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_PUPT.epf -i ../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 20:39:00,170 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 20:39:00,172 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 20:39:00,185 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 20:39:00,186 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 20:39:00,187 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 20:39:00,188 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 20:39:00,190 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 20:39:00,192 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 20:39:00,192 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 20:39:00,193 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 20:39:00,217 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-09-30 20:39:00,232 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 20:39:00,232 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 20:39:00,233 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 20:39:00,233 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 20:39:00,234 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 20:39:00,234 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 20:39:00,234 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 20:39:00,234 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 20:39:00,234 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 20:39:00,235 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 20:39:00,235 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 20:39:00,235 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 20:39:00,235 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 20:39:00,235 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 20:39:00,236 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 20:39:00,236 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 20:39:00,236 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 20:39:00,236 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 20:39:00,236 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 20:39:00,237 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 20:39:00,237 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 20:39:00,237 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 20:39:00,237 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:39:00,237 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 20:39:00,238 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 20:39:00,238 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 20:39:00,238 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 20:39:00,238 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 20:39:00,239 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 20:39:00,239 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 20:39:00,239 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-30 20:39:00,290 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 20:39:00,306 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 20:39:00,312 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 20:39:00,313 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 20:39:00,314 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 20:39:00,315 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl [2018-09-30 20:39:00,315 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl' [2018-09-30 20:39:00,376 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 20:39:00,379 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 20:39:00,380 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 20:39:00,382 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 20:39:00,382 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 20:39:00,404 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 08:39:00" (1/1) ... [2018-09-30 20:39:00,417 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 08:39:00" (1/1) ... [2018-09-30 20:39:00,426 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 20:39:00,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 20:39:00,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 20:39:00,427 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 20:39:00,440 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 08:39:00" (1/1) ... [2018-09-30 20:39:00,440 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 08:39:00" (1/1) ... [2018-09-30 20:39:00,441 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 08:39:00" (1/1) ... [2018-09-30 20:39:00,441 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 08:39:00" (1/1) ... [2018-09-30 20:39:00,444 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 08:39:00" (1/1) ... [2018-09-30 20:39:00,446 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 08:39:00" (1/1) ... [2018-09-30 20:39:00,446 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 08:39:00" (1/1) ... [2018-09-30 20:39:00,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 20:39:00,448 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 20:39:00,448 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 20:39:00,449 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 20:39:00,450 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 08:39:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:39:00,522 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-30 20:39:00,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 20:39:00,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 20:39:00,732 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 20:39:00,732 INFO L202 PluginConnector]: Adding new model overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:39:00 BoogieIcfgContainer [2018-09-30 20:39:00,733 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 20:39:00,734 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 20:39:00,734 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 20:39:00,737 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 20:39:00,738 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 08:39:00" (1/2) ... [2018-09-30 20:39:00,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@345ebd7e and model type overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 08:39:00, skipping insertion in model container [2018-09-30 20:39:00,739 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 08:39:00" (2/2) ... [2018-09-30 20:39:00,741 INFO L112 eAbstractionObserver]: Analyzing ICFG overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl [2018-09-30 20:39:00,751 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 20:39:00,759 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 20:39:00,817 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 20:39:00,818 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 20:39:00,818 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 20:39:00,819 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 20:39:00,819 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 20:39:00,819 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 20:39:00,819 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 20:39:00,819 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 20:39:00,820 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 20:39:00,839 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-30 20:39:00,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 20:39:00,855 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:00,857 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 20:39:00,858 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:00,866 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:00,867 INFO L82 PathProgramCache]: Analyzing trace with hash 30017, now seen corresponding path program 1 times [2018-09-30 20:39:00,872 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:00,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:00,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:00,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:00,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:00,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:01,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:01,047 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:39:01,047 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 20:39:01,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 20:39:01,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 20:39:01,065 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:01,067 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-30 20:39:01,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:01,178 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-09-30 20:39:01,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 20:39:01,181 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-30 20:39:01,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:01,203 INFO L225 Difference]: With dead ends: 9 [2018-09-30 20:39:01,203 INFO L226 Difference]: Without dead ends: 5 [2018-09-30 20:39:01,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 20:39:01,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-30 20:39:01,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-30 20:39:01,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-30 20:39:01,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-30 20:39:01,300 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-30 20:39:01,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:01,301 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-30 20:39:01,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 20:39:01,301 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-30 20:39:01,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 20:39:01,302 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:01,302 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 20:39:01,302 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:01,302 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:01,303 INFO L82 PathProgramCache]: Analyzing trace with hash 928552, now seen corresponding path program 1 times [2018-09-30 20:39:01,303 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:01,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:01,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:01,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:01,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:01,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:01,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:01,361 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:01,361 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:39:01,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:01,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:01,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:01,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:01,467 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:01,468 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 20:39:01,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 20:39:01,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 20:39:01,469 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:01,469 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-09-30 20:39:01,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:01,536 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-30 20:39:01,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 20:39:01,537 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-09-30 20:39:01,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:01,537 INFO L225 Difference]: With dead ends: 8 [2018-09-30 20:39:01,537 INFO L226 Difference]: Without dead ends: 6 [2018-09-30 20:39:01,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 20:39:01,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-30 20:39:01,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-30 20:39:01,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 20:39:01,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-30 20:39:01,540 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-30 20:39:01,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:01,541 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-30 20:39:01,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 20:39:01,541 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-30 20:39:01,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 20:39:01,542 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:01,542 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-30 20:39:01,542 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:01,542 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:01,542 INFO L82 PathProgramCache]: Analyzing trace with hash 28783137, now seen corresponding path program 2 times [2018-09-30 20:39:01,542 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:01,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:01,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:01,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:01,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:01,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:01,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:01,599 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:01,600 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:01,609 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:39:01,625 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:39:01,625 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:01,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:01,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:01,695 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:01,695 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 20:39:01,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 20:39:01,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 20:39:01,696 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:01,696 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-09-30 20:39:01,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:01,840 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 20:39:01,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:39:01,840 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-30 20:39:01,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:01,841 INFO L225 Difference]: With dead ends: 9 [2018-09-30 20:39:01,841 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 20:39:01,842 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 20:39:01,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 20:39:01,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 20:39:01,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 20:39:01,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 20:39:01,845 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-30 20:39:01,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:01,845 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 20:39:01,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 20:39:01,846 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 20:39:01,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 20:39:01,846 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:01,847 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-30 20:39:01,847 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:01,847 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:01,848 INFO L82 PathProgramCache]: Analyzing trace with hash 892275272, now seen corresponding path program 3 times [2018-09-30 20:39:01,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:01,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:01,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:01,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:01,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:01,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:02,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:02,083 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:02,083 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:02,097 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:39:02,116 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 20:39:02,117 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:02,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:02,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:02,200 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:02,200 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 20:39:02,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 20:39:02,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 20:39:02,201 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:02,201 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-09-30 20:39:02,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:02,306 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-30 20:39:02,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:39:02,308 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-09-30 20:39:02,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:02,309 INFO L225 Difference]: With dead ends: 10 [2018-09-30 20:39:02,309 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 20:39:02,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:39:02,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 20:39:02,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 20:39:02,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 20:39:02,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-30 20:39:02,313 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-30 20:39:02,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:02,314 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-30 20:39:02,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 20:39:02,314 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-30 20:39:02,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 20:39:02,315 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:02,315 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-09-30 20:39:02,315 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:02,315 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:02,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1890727681, now seen corresponding path program 4 times [2018-09-30 20:39:02,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:02,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:02,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:02,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:02,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:02,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:02,422 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:02,422 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:02,422 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:02,431 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:39:02,442 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:39:02,442 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:02,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:02,493 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:02,526 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:02,527 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 20:39:02,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:39:02,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:39:02,528 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:02,528 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-09-30 20:39:02,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:02,645 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 20:39:02,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:39:02,651 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-30 20:39:02,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:02,651 INFO L225 Difference]: With dead ends: 11 [2018-09-30 20:39:02,652 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 20:39:02,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:39:02,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 20:39:02,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 20:39:02,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 20:39:02,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 20:39:02,657 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-30 20:39:02,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:02,658 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 20:39:02,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:39:02,658 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 20:39:02,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 20:39:02,658 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:02,659 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-30 20:39:02,659 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:02,659 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:02,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1516986008, now seen corresponding path program 5 times [2018-09-30 20:39:02,660 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:02,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:02,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:02,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:02,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:02,800 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:02,801 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:02,801 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:02,812 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:39:02,822 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 20:39:02,822 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:02,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:02,852 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:02,873 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:02,874 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:39:02,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:39:02,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:39:02,874 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:02,874 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-09-30 20:39:03,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:03,264 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-30 20:39:03,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:39:03,265 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-30 20:39:03,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:03,266 INFO L225 Difference]: With dead ends: 12 [2018-09-30 20:39:03,266 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 20:39:03,266 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:39:03,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 20:39:03,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 20:39:03,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 20:39:03,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-30 20:39:03,269 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-30 20:39:03,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:03,270 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-30 20:39:03,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:39:03,270 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-30 20:39:03,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 20:39:03,271 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:03,271 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-09-30 20:39:03,271 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:03,272 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:03,272 INFO L82 PathProgramCache]: Analyzing trace with hash 218072033, now seen corresponding path program 6 times [2018-09-30 20:39:03,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:03,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:03,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:03,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:03,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:03,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:03,575 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:03,576 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:03,576 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:03,585 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:39:03,595 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-30 20:39:03,595 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:03,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:03,666 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:03,688 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:03,688 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:39:03,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:39:03,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:39:03,689 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:03,689 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-09-30 20:39:03,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:03,771 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 20:39:03,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:39:03,773 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-09-30 20:39:03,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:03,774 INFO L225 Difference]: With dead ends: 13 [2018-09-30 20:39:03,774 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 20:39:03,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:39:03,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 20:39:03,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 20:39:03,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 20:39:03,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 20:39:03,777 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-30 20:39:03,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:03,778 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 20:39:03,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:39:03,778 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 20:39:03,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:39:03,779 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:03,779 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-30 20:39:03,779 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:03,779 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:03,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1829703544, now seen corresponding path program 7 times [2018-09-30 20:39:03,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:03,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:03,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:03,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:03,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:03,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:03,954 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:03,954 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:03,955 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:03,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:03,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:03,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:04,039 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:04,060 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:04,061 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:39:04,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:39:04,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:39:04,062 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:04,062 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-09-30 20:39:04,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:04,156 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-30 20:39:04,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:39:04,157 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-09-30 20:39:04,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:04,158 INFO L225 Difference]: With dead ends: 14 [2018-09-30 20:39:04,158 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 20:39:04,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:39:04,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 20:39:04,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 20:39:04,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 20:39:04,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-30 20:39:04,161 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-30 20:39:04,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:04,162 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-30 20:39:04,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:39:04,162 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-30 20:39:04,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 20:39:04,163 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:04,163 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-09-30 20:39:04,163 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:04,163 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:04,163 INFO L82 PathProgramCache]: Analyzing trace with hash -886236991, now seen corresponding path program 8 times [2018-09-30 20:39:04,163 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:04,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:04,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:04,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:04,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:04,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:04,296 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:04,296 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:04,297 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:04,307 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:39:04,331 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:39:04,332 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:04,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:04,387 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:04,408 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:04,408 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:39:04,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:39:04,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:39:04,409 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:04,409 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-09-30 20:39:04,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:04,558 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 20:39:04,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:39:04,559 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-09-30 20:39:04,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:04,560 INFO L225 Difference]: With dead ends: 15 [2018-09-30 20:39:04,560 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 20:39:04,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:39:04,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 20:39:04,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 20:39:04,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 20:39:04,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 20:39:04,564 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-30 20:39:04,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:04,564 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 20:39:04,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:39:04,565 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 20:39:04,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 20:39:04,565 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:04,565 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-30 20:39:04,566 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:04,566 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:04,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1703544920, now seen corresponding path program 9 times [2018-09-30 20:39:04,566 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:04,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:04,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:04,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:04,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:04,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:04,877 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:04,877 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:04,878 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:04,888 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:39:04,909 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 20:39:04,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:04,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:04,971 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:04,992 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:04,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 20:39:04,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:39:04,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:39:04,994 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:04,994 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-09-30 20:39:05,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:05,086 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-30 20:39:05,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 20:39:05,087 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-09-30 20:39:05,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:05,088 INFO L225 Difference]: With dead ends: 16 [2018-09-30 20:39:05,088 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 20:39:05,088 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:39:05,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 20:39:05,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 20:39:05,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 20:39:05,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-30 20:39:05,092 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-30 20:39:05,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:05,093 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-30 20:39:05,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:39:05,093 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-30 20:39:05,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:39:05,093 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:05,093 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-09-30 20:39:05,094 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:05,094 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:05,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1270286943, now seen corresponding path program 10 times [2018-09-30 20:39:05,094 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:05,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:05,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:05,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:05,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:05,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:05,236 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:05,237 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:05,237 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:05,246 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:39:05,257 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:39:05,257 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:05,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:05,335 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:05,356 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:05,357 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 20:39:05,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:39:05,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:39:05,357 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:05,358 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-09-30 20:39:05,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:05,459 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 20:39:05,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 20:39:05,460 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-30 20:39:05,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:05,460 INFO L225 Difference]: With dead ends: 17 [2018-09-30 20:39:05,460 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 20:39:05,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:39:05,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 20:39:05,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 20:39:05,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 20:39:05,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 20:39:05,466 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-30 20:39:05,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:05,466 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 20:39:05,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:39:05,466 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 20:39:05,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 20:39:05,467 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:05,467 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-30 20:39:05,467 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:05,468 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:05,468 INFO L82 PathProgramCache]: Analyzing trace with hash -724191544, now seen corresponding path program 11 times [2018-09-30 20:39:05,468 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:05,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:05,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:05,469 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:05,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:05,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:05,652 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:05,652 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:05,653 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:05,661 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:39:05,674 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 20:39:05,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:05,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:05,753 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:05,775 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:05,775 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 20:39:05,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:39:05,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:39:05,776 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:05,776 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-09-30 20:39:05,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:05,880 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-30 20:39:05,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 20:39:05,880 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-30 20:39:05,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:05,881 INFO L225 Difference]: With dead ends: 18 [2018-09-30 20:39:05,882 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 20:39:05,882 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:39:05,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 20:39:05,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 20:39:05,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 20:39:05,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-30 20:39:05,886 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-30 20:39:05,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:05,886 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-30 20:39:05,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:39:05,887 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-30 20:39:05,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:39:05,887 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:05,888 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-09-30 20:39:05,888 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:05,888 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:05,888 INFO L82 PathProgramCache]: Analyzing trace with hash -975103359, now seen corresponding path program 12 times [2018-09-30 20:39:05,888 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:05,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:05,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:05,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:05,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:05,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:06,027 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:06,028 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:06,028 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:06,037 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:39:06,051 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 20:39:06,051 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:06,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:06,101 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:06,126 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:06,126 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 20:39:06,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:39:06,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:39:06,127 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:06,127 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-09-30 20:39:06,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:06,261 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 20:39:06,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 20:39:06,262 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-30 20:39:06,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:06,263 INFO L225 Difference]: With dead ends: 19 [2018-09-30 20:39:06,263 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 20:39:06,264 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:39:06,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 20:39:06,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 20:39:06,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 20:39:06,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 20:39:06,268 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-30 20:39:06,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:06,268 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 20:39:06,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:39:06,268 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 20:39:06,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 20:39:06,269 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:06,269 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-30 20:39:06,269 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:06,270 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:06,270 INFO L82 PathProgramCache]: Analyzing trace with hash -163435032, now seen corresponding path program 13 times [2018-09-30 20:39:06,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:06,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:06,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:06,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:06,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:06,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:06,406 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:06,407 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:06,407 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:06,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:06,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:06,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:06,561 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:06,583 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:06,584 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 20:39:06,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:39:06,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:39:06,585 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:06,585 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-09-30 20:39:06,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:06,867 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-30 20:39:06,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 20:39:06,867 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-09-30 20:39:06,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:06,868 INFO L225 Difference]: With dead ends: 20 [2018-09-30 20:39:06,868 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 20:39:06,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:39:06,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 20:39:06,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-30 20:39:06,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 20:39:06,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-30 20:39:06,873 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-30 20:39:06,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:06,873 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-30 20:39:06,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:39:06,874 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-30 20:39:06,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:39:06,874 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:06,874 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-09-30 20:39:06,874 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:06,875 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:06,875 INFO L82 PathProgramCache]: Analyzing trace with hash -771520671, now seen corresponding path program 14 times [2018-09-30 20:39:06,875 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:06,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:06,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:06,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:06,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:06,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:07,033 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:07,034 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:07,060 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:39:07,073 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:39:07,073 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:07,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:07,129 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:07,151 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:07,152 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 20:39:07,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 20:39:07,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 20:39:07,153 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:07,153 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-09-30 20:39:07,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:07,295 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 20:39:07,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 20:39:07,296 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-09-30 20:39:07,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:07,297 INFO L225 Difference]: With dead ends: 21 [2018-09-30 20:39:07,297 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 20:39:07,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:39:07,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 20:39:07,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 20:39:07,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 20:39:07,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 20:39:07,302 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-30 20:39:07,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:07,303 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 20:39:07,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 20:39:07,303 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 20:39:07,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:39:07,304 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:07,304 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-30 20:39:07,304 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:07,304 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:07,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1852661000, now seen corresponding path program 15 times [2018-09-30 20:39:07,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:07,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:07,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:07,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:07,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:07,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:07,763 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:07,764 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:07,764 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:07,776 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:39:07,830 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 20:39:07,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:07,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:07,944 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:07,969 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:07,969 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 20:39:07,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 20:39:07,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 20:39:07,969 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:07,970 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-09-30 20:39:08,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:08,118 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-30 20:39:08,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 20:39:08,119 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-30 20:39:08,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:08,120 INFO L225 Difference]: With dead ends: 22 [2018-09-30 20:39:08,120 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 20:39:08,121 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:39:08,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 20:39:08,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 20:39:08,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 20:39:08,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-30 20:39:08,125 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-30 20:39:08,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:08,125 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-30 20:39:08,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 20:39:08,126 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-30 20:39:08,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:39:08,126 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:08,126 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-09-30 20:39:08,127 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:08,127 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:08,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1597914177, now seen corresponding path program 16 times [2018-09-30 20:39:08,127 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:08,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:08,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:08,128 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:08,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:08,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:08,253 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:08,253 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:08,253 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:08,262 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:39:08,289 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:39:08,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:08,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:08,481 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:08,513 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:08,514 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 20:39:08,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 20:39:08,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 20:39:08,515 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:08,515 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-09-30 20:39:08,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:08,868 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 20:39:08,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 20:39:08,870 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-09-30 20:39:08,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:08,870 INFO L225 Difference]: With dead ends: 23 [2018-09-30 20:39:08,870 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 20:39:08,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:39:08,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 20:39:08,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 20:39:08,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 20:39:08,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 20:39:08,874 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-30 20:39:08,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:08,875 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 20:39:08,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 20:39:08,875 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 20:39:08,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 20:39:08,875 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:08,876 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-30 20:39:08,876 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:08,876 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:08,876 INFO L82 PathProgramCache]: Analyzing trace with hash -2004270040, now seen corresponding path program 17 times [2018-09-30 20:39:08,876 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:08,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:08,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:08,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:08,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:08,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:08,995 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:08,996 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:08,996 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 20:39:09,003 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:39:09,037 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 20:39:09,037 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:09,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:09,105 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:09,126 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:09,127 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 20:39:09,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 20:39:09,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 20:39:09,127 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:09,128 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-09-30 20:39:09,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:09,373 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-30 20:39:09,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 20:39:09,373 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-09-30 20:39:09,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:09,374 INFO L225 Difference]: With dead ends: 24 [2018-09-30 20:39:09,374 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 20:39:09,375 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:39:09,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 20:39:09,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 20:39:09,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 20:39:09,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-30 20:39:09,379 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-30 20:39:09,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:09,380 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-30 20:39:09,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 20:39:09,380 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-30 20:39:09,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 20:39:09,380 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:09,381 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-09-30 20:39:09,381 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:09,381 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:09,381 INFO L82 PathProgramCache]: Analyzing trace with hash -2002831071, now seen corresponding path program 18 times [2018-09-30 20:39:09,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:09,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:09,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:09,383 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:09,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:09,533 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:09,534 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:09,534 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:09,544 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:39:09,662 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-30 20:39:09,663 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:09,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:09,897 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:09,927 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:09,928 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 20:39:09,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 20:39:09,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 20:39:09,929 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:09,929 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-09-30 20:39:10,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:10,077 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 20:39:10,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 20:39:10,077 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-09-30 20:39:10,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:10,078 INFO L225 Difference]: With dead ends: 25 [2018-09-30 20:39:10,078 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 20:39:10,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:39:10,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 20:39:10,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 20:39:10,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 20:39:10,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 20:39:10,083 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-30 20:39:10,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:10,083 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 20:39:10,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 20:39:10,084 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 20:39:10,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 20:39:10,084 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:10,084 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-30 20:39:10,085 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:10,085 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:10,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1958223032, now seen corresponding path program 19 times [2018-09-30 20:39:10,085 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:10,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:10,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:10,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:10,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:10,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:10,450 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:10,451 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:10,451 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:10,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:10,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:10,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:10,585 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:10,607 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:10,608 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 20:39:10,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 20:39:10,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 20:39:10,608 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:10,608 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-09-30 20:39:10,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:10,785 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-30 20:39:10,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 20:39:10,786 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-09-30 20:39:10,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:10,787 INFO L225 Difference]: With dead ends: 26 [2018-09-30 20:39:10,787 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 20:39:10,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:39:10,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 20:39:10,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-30 20:39:10,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:39:10,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-30 20:39:10,791 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-30 20:39:10,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:10,791 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-30 20:39:10,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 20:39:10,791 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-30 20:39:10,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 20:39:10,792 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:10,792 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-09-30 20:39:10,792 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:10,793 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:10,793 INFO L82 PathProgramCache]: Analyzing trace with hash -575373823, now seen corresponding path program 20 times [2018-09-30 20:39:10,793 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:10,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:10,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:10,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:10,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:10,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:11,080 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:11,081 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:11,081 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:11,088 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:39:11,103 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:39:11,103 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:11,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:11,235 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:11,256 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:11,257 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 20:39:11,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 20:39:11,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 20:39:11,257 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:11,258 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-09-30 20:39:11,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:11,394 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 20:39:11,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:39:11,394 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-09-30 20:39:11,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:11,395 INFO L225 Difference]: With dead ends: 27 [2018-09-30 20:39:11,395 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 20:39:11,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:39:11,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 20:39:11,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 20:39:11,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 20:39:11,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 20:39:11,399 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-30 20:39:11,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:11,399 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 20:39:11,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 20:39:11,400 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 20:39:11,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 20:39:11,400 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:11,400 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-30 20:39:11,401 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:11,401 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:11,401 INFO L82 PathProgramCache]: Analyzing trace with hash -656721304, now seen corresponding path program 21 times [2018-09-30 20:39:11,401 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:11,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:11,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:11,402 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:11,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:11,608 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:11,608 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:11,608 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:11,615 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:39:11,632 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 20:39:11,632 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:11,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:11,856 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:11,895 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:11,895 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 20:39:11,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 20:39:11,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 20:39:11,896 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:11,896 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-09-30 20:39:12,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:12,167 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-30 20:39:12,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 20:39:12,173 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-09-30 20:39:12,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:12,173 INFO L225 Difference]: With dead ends: 28 [2018-09-30 20:39:12,173 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 20:39:12,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:39:12,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 20:39:12,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 20:39:12,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:39:12,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-30 20:39:12,176 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-30 20:39:12,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:12,177 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-30 20:39:12,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 20:39:12,177 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-30 20:39:12,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 20:39:12,177 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:12,177 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-09-30 20:39:12,178 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:12,178 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:12,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1116474081, now seen corresponding path program 22 times [2018-09-30 20:39:12,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:12,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:12,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:12,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:12,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:12,392 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:12,392 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:12,392 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:12,401 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:39:12,417 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:39:12,418 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:12,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:12,548 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:12,580 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:12,581 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 20:39:12,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 20:39:12,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 20:39:12,582 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:12,582 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-09-30 20:39:12,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:12,733 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 20:39:12,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 20:39:12,734 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-09-30 20:39:12,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:12,734 INFO L225 Difference]: With dead ends: 29 [2018-09-30 20:39:12,734 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 20:39:12,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:39:12,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 20:39:12,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 20:39:12,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 20:39:12,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 20:39:12,738 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-30 20:39:12,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:12,738 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 20:39:12,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 20:39:12,739 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 20:39:12,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 20:39:12,740 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:12,740 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-30 20:39:12,740 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:12,740 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:12,740 INFO L82 PathProgramCache]: Analyzing trace with hash 250956168, now seen corresponding path program 23 times [2018-09-30 20:39:12,740 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:12,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:12,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:12,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:12,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:12,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:12,897 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:12,898 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:12,898 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:12,909 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:39:12,965 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-30 20:39:12,966 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:12,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:13,061 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:13,084 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:13,084 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 20:39:13,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 20:39:13,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 20:39:13,085 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:13,085 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-09-30 20:39:13,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:13,220 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-30 20:39:13,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 20:39:13,227 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-09-30 20:39:13,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:13,227 INFO L225 Difference]: With dead ends: 30 [2018-09-30 20:39:13,227 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 20:39:13,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:39:13,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 20:39:13,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 20:39:13,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:39:13,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-30 20:39:13,232 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-30 20:39:13,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:13,232 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-30 20:39:13,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 20:39:13,232 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-30 20:39:13,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 20:39:13,233 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:13,233 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-09-30 20:39:13,234 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:13,235 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:13,235 INFO L82 PathProgramCache]: Analyzing trace with hash -810295359, now seen corresponding path program 24 times [2018-09-30 20:39:13,235 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:13,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:13,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:13,236 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:13,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:13,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:13,425 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:13,425 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:13,425 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:13,432 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:39:13,455 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 20:39:13,456 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:13,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:13,622 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:13,642 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:13,643 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 20:39:13,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 20:39:13,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 20:39:13,644 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:13,644 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-09-30 20:39:13,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:13,860 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 20:39:13,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 20:39:13,861 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-09-30 20:39:13,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:13,862 INFO L225 Difference]: With dead ends: 31 [2018-09-30 20:39:13,862 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 20:39:13,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:39:13,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 20:39:13,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 20:39:13,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 20:39:13,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 20:39:13,867 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-30 20:39:13,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:13,867 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 20:39:13,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 20:39:13,867 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 20:39:13,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 20:39:13,868 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:13,868 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-30 20:39:13,869 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:13,869 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:13,869 INFO L82 PathProgramCache]: Analyzing trace with hash 650645672, now seen corresponding path program 25 times [2018-09-30 20:39:13,869 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:13,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:13,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:13,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:13,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:13,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:14,032 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:14,032 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:14,033 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:14,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:14,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:14,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:14,136 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:14,155 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:14,156 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 20:39:14,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 20:39:14,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 20:39:14,156 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:14,156 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-09-30 20:39:14,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:14,332 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-30 20:39:14,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 20:39:14,333 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-09-30 20:39:14,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:14,333 INFO L225 Difference]: With dead ends: 32 [2018-09-30 20:39:14,333 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 20:39:14,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:39:14,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 20:39:14,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-30 20:39:14,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:39:14,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-30 20:39:14,338 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-30 20:39:14,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:14,338 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-30 20:39:14,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 20:39:14,338 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-30 20:39:14,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 20:39:14,339 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:14,339 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-09-30 20:39:14,339 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:14,339 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:14,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1304822623, now seen corresponding path program 26 times [2018-09-30 20:39:14,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:14,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:14,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:14,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:14,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:14,490 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:14,490 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:14,491 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:14,500 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:39:14,519 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:39:14,519 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:14,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:14,574 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:14,595 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:14,596 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 20:39:14,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 20:39:14,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 20:39:14,596 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:14,596 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-09-30 20:39:14,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:14,825 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 20:39:14,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 20:39:14,826 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-09-30 20:39:14,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:14,827 INFO L225 Difference]: With dead ends: 33 [2018-09-30 20:39:14,827 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 20:39:14,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:39:14,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 20:39:14,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 20:39:14,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 20:39:14,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 20:39:14,830 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-30 20:39:14,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:14,830 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 20:39:14,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 20:39:14,831 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 20:39:14,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 20:39:14,831 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:14,831 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-30 20:39:14,831 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:14,832 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:14,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1794797624, now seen corresponding path program 27 times [2018-09-30 20:39:14,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:14,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:14,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:14,833 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:14,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:14,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:15,807 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:15,807 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:15,807 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:15,816 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:39:15,837 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-30 20:39:15,837 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:15,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:15,937 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:15,959 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:15,959 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 20:39:15,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 20:39:15,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 20:39:15,960 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:15,960 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-09-30 20:39:16,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:16,137 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-30 20:39:16,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 20:39:16,137 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-09-30 20:39:16,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:16,138 INFO L225 Difference]: With dead ends: 34 [2018-09-30 20:39:16,138 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 20:39:16,138 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:39:16,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 20:39:16,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 20:39:16,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:39:16,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-30 20:39:16,143 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-30 20:39:16,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:16,143 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-30 20:39:16,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 20:39:16,144 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-30 20:39:16,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 20:39:16,144 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:16,144 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-09-30 20:39:16,144 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:16,145 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:16,145 INFO L82 PathProgramCache]: Analyzing trace with hash 195846529, now seen corresponding path program 28 times [2018-09-30 20:39:16,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:16,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:16,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:16,146 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:16,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:16,335 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:16,336 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:16,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:16,350 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:39:16,368 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:39:16,368 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:16,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:16,422 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:16,444 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:16,444 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 20:39:16,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 20:39:16,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 20:39:16,444 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:16,445 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-09-30 20:39:16,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:16,584 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 20:39:16,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 20:39:16,585 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-09-30 20:39:16,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:16,586 INFO L225 Difference]: With dead ends: 35 [2018-09-30 20:39:16,586 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 20:39:16,586 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:39:16,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 20:39:16,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 20:39:16,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 20:39:16,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 20:39:16,590 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-30 20:39:16,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:16,590 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 20:39:16,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 20:39:16,591 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 20:39:16,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 20:39:16,591 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:16,591 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-30 20:39:16,591 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:16,592 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:16,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1776273128, now seen corresponding path program 29 times [2018-09-30 20:39:16,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:16,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:16,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:16,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:16,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:16,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:16,806 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:16,807 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:16,807 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:16,814 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:39:16,891 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-30 20:39:16,891 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:16,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:16,973 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:16,995 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:16,995 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 20:39:16,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 20:39:16,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 20:39:16,996 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:16,996 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-09-30 20:39:17,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:17,142 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-30 20:39:17,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 20:39:17,142 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-09-30 20:39:17,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:17,143 INFO L225 Difference]: With dead ends: 36 [2018-09-30 20:39:17,143 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 20:39:17,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:39:17,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 20:39:17,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 20:39:17,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:39:17,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-30 20:39:17,147 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-30 20:39:17,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:17,148 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-30 20:39:17,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 20:39:17,148 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-30 20:39:17,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 20:39:17,148 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:17,148 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-09-30 20:39:17,148 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:17,149 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:17,149 INFO L82 PathProgramCache]: Analyzing trace with hash -770109855, now seen corresponding path program 30 times [2018-09-30 20:39:17,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:17,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:17,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:17,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:17,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:17,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:17,504 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:17,505 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:17,505 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:17,515 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:39:17,542 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-30 20:39:17,542 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:17,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:17,690 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:17,710 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:17,711 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 20:39:17,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 20:39:17,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 20:39:17,711 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:17,711 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-09-30 20:39:17,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:17,969 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 20:39:17,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 20:39:17,969 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-09-30 20:39:17,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:17,970 INFO L225 Difference]: With dead ends: 37 [2018-09-30 20:39:17,970 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 20:39:17,971 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:39:17,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 20:39:17,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 20:39:17,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 20:39:17,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 20:39:17,974 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-30 20:39:17,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:17,974 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 20:39:17,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 20:39:17,975 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 20:39:17,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 20:39:17,975 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:17,975 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-09-30 20:39:17,975 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:17,975 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:17,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1896396296, now seen corresponding path program 31 times [2018-09-30 20:39:17,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:17,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:17,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:17,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:17,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:17,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:18,169 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:18,169 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:18,169 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:18,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:18,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:18,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:18,256 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:18,279 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:18,279 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 20:39:18,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 20:39:18,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 20:39:18,280 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:18,280 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-09-30 20:39:18,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:18,476 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-30 20:39:18,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 20:39:18,477 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-09-30 20:39:18,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:18,477 INFO L225 Difference]: With dead ends: 38 [2018-09-30 20:39:18,478 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 20:39:18,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:39:18,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 20:39:18,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-30 20:39:18,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 20:39:18,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-30 20:39:18,483 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-30 20:39:18,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:18,483 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-30 20:39:18,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 20:39:18,483 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-30 20:39:18,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 20:39:18,484 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:18,484 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-09-30 20:39:18,484 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:18,484 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:18,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1341258943, now seen corresponding path program 32 times [2018-09-30 20:39:18,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:18,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:18,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:18,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:18,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:19,033 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:19,034 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:19,034 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:19,041 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:39:19,061 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:39:19,061 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:19,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:19,132 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:19,153 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:19,154 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 20:39:19,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 20:39:19,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 20:39:19,154 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:19,154 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-09-30 20:39:19,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:19,382 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 20:39:19,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 20:39:19,383 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-09-30 20:39:19,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:19,384 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:39:19,384 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 20:39:19,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:39:19,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 20:39:19,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 20:39:19,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 20:39:19,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 20:39:19,389 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-30 20:39:19,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:19,389 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 20:39:19,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 20:39:19,389 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 20:39:19,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 20:39:19,390 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:19,390 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-09-30 20:39:19,390 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:19,390 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:19,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1370643752, now seen corresponding path program 33 times [2018-09-30 20:39:19,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:19,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:19,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:19,391 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:19,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:19,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:19,630 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:19,631 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:19,631 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:19,638 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:39:19,675 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-30 20:39:19,676 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:19,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:19,772 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:19,792 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:19,792 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 20:39:19,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 20:39:19,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 20:39:19,793 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:19,793 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-09-30 20:39:19,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:19,954 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-30 20:39:19,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 20:39:19,954 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-09-30 20:39:19,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:19,955 INFO L225 Difference]: With dead ends: 40 [2018-09-30 20:39:19,955 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 20:39:19,956 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:39:19,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 20:39:19,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-30 20:39:19,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 20:39:19,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-30 20:39:19,958 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-30 20:39:19,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:19,958 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-30 20:39:19,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 20:39:19,959 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-30 20:39:19,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 20:39:19,959 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:19,959 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-09-30 20:39:19,959 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:19,959 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:19,959 INFO L82 PathProgramCache]: Analyzing trace with hash -459718623, now seen corresponding path program 34 times [2018-09-30 20:39:19,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:19,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:19,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:19,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:19,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:19,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:20,799 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:20,800 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:20,800 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:20,809 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:39:20,831 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:39:20,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:20,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:21,047 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:21,068 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:21,068 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 20:39:21,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 20:39:21,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 20:39:21,069 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:21,069 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-09-30 20:39:21,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:21,309 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 20:39:21,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 20:39:21,309 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-09-30 20:39:21,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:21,310 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:39:21,310 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:39:21,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:39:21,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:39:21,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 20:39:21,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 20:39:21,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 20:39:21,314 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-30 20:39:21,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:21,314 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 20:39:21,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 20:39:21,315 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 20:39:21,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 20:39:21,315 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:21,315 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-09-30 20:39:21,315 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:21,316 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:21,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1366377400, now seen corresponding path program 35 times [2018-09-30 20:39:21,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:21,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:21,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:21,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:21,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:21,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:21,539 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:21,540 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:21,540 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:21,549 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:39:21,575 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 20:39:21,576 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:21,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:21,645 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:21,666 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:21,667 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 20:39:21,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 20:39:21,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 20:39:21,667 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:21,667 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-09-30 20:39:21,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:21,939 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-30 20:39:21,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 20:39:21,940 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-09-30 20:39:21,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:21,941 INFO L225 Difference]: With dead ends: 42 [2018-09-30 20:39:21,941 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 20:39:21,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:39:21,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 20:39:21,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 20:39:21,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 20:39:21,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-30 20:39:21,944 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-30 20:39:21,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:21,944 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-30 20:39:21,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 20:39:21,944 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-30 20:39:21,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 20:39:21,945 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:21,945 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-09-30 20:39:21,945 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:21,945 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:21,945 INFO L82 PathProgramCache]: Analyzing trace with hash 591971585, now seen corresponding path program 36 times [2018-09-30 20:39:21,945 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:21,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:21,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:21,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:21,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:21,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:22,178 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:22,179 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:22,179 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:22,186 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:39:22,215 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 20:39:22,215 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:22,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:23,178 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:23,218 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:23,218 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 20:39:23,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 20:39:23,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 20:39:23,219 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:23,219 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-09-30 20:39:24,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:24,001 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 20:39:24,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 20:39:24,002 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-09-30 20:39:24,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:24,002 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:39:24,002 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:39:24,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:39:24,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:39:24,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 20:39:24,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 20:39:24,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 20:39:24,004 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-30 20:39:24,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:24,004 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 20:39:24,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 20:39:24,005 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 20:39:24,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 20:39:24,005 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:24,005 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-09-30 20:39:24,005 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:24,006 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:24,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1171247976, now seen corresponding path program 37 times [2018-09-30 20:39:24,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:24,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:24,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:24,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:24,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:24,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:24,241 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:24,241 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:24,241 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:24,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:24,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:24,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:24,347 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:24,368 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:24,368 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 20:39:24,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 20:39:24,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 20:39:24,369 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:24,369 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-09-30 20:39:24,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:24,658 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-30 20:39:24,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 20:39:24,658 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-09-30 20:39:24,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:24,659 INFO L225 Difference]: With dead ends: 44 [2018-09-30 20:39:24,659 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 20:39:24,659 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:39:24,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 20:39:24,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-30 20:39:24,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 20:39:24,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-30 20:39:24,662 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-30 20:39:24,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:24,663 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-30 20:39:24,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 20:39:24,663 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-30 20:39:24,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 20:39:24,664 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:24,664 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-09-30 20:39:24,664 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:24,664 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:24,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1948946913, now seen corresponding path program 38 times [2018-09-30 20:39:24,664 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:24,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:24,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:24,665 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:24,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:24,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:25,098 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:25,099 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:25,099 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:25,106 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:39:25,130 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:39:25,130 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:25,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:25,210 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:25,230 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:25,230 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 20:39:25,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 20:39:25,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 20:39:25,231 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:25,231 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-09-30 20:39:25,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:25,510 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 20:39:25,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 20:39:25,511 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-09-30 20:39:25,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:25,511 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:39:25,512 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:39:25,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:39:25,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:39:25,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 20:39:25,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 20:39:25,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 20:39:25,515 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-30 20:39:25,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:25,515 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 20:39:25,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 20:39:25,515 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 20:39:25,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 20:39:25,516 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:25,516 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-09-30 20:39:25,516 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:25,516 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:25,517 INFO L82 PathProgramCache]: Analyzing trace with hash 287810184, now seen corresponding path program 39 times [2018-09-30 20:39:25,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:25,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:25,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:25,517 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:25,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:25,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:25,822 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:25,822 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:25,822 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:25,830 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:39:25,861 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-30 20:39:25,862 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:25,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:25,941 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:25,962 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:25,962 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 20:39:25,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 20:39:25,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 20:39:25,963 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:25,963 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-09-30 20:39:26,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:26,173 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-30 20:39:26,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 20:39:26,174 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-09-30 20:39:26,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:26,175 INFO L225 Difference]: With dead ends: 46 [2018-09-30 20:39:26,175 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 20:39:26,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:39:26,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 20:39:26,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-30 20:39:26,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-30 20:39:26,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-30 20:39:26,177 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-30 20:39:26,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:26,177 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-30 20:39:26,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 20:39:26,178 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-30 20:39:26,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-30 20:39:26,178 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:26,178 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-09-30 20:39:26,178 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:26,178 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:26,178 INFO L82 PathProgramCache]: Analyzing trace with hash 332179137, now seen corresponding path program 40 times [2018-09-30 20:39:26,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:26,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:26,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:26,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:26,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:26,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:26,483 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:26,484 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:26,484 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:26,491 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:39:26,519 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:39:26,520 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:26,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:26,622 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:26,643 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:26,643 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 20:39:26,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 20:39:26,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 20:39:26,644 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:26,644 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-09-30 20:39:26,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:26,973 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 20:39:26,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 20:39:26,974 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-09-30 20:39:26,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:26,975 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:39:26,975 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:39:26,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:39:26,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:39:26,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 20:39:26,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 20:39:26,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 20:39:26,978 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-30 20:39:26,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:26,979 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 20:39:26,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 20:39:26,979 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 20:39:26,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 20:39:26,979 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:26,979 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-09-30 20:39:26,980 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:26,980 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:26,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1707616680, now seen corresponding path program 41 times [2018-09-30 20:39:26,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:26,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:26,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:26,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:26,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:26,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:27,498 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:27,498 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:27,498 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:27,508 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:39:27,543 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-30 20:39:27,543 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:27,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:27,651 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:27,675 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:27,676 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 20:39:27,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 20:39:27,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 20:39:27,676 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:27,676 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-09-30 20:39:28,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:28,160 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-30 20:39:28,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 20:39:28,160 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-09-30 20:39:28,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:28,161 INFO L225 Difference]: With dead ends: 48 [2018-09-30 20:39:28,161 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 20:39:28,161 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:39:28,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 20:39:28,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 20:39:28,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 20:39:28,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-30 20:39:28,164 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-30 20:39:28,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:28,164 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-30 20:39:28,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 20:39:28,164 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-30 20:39:28,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-30 20:39:28,165 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:28,165 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-09-30 20:39:28,165 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:28,165 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:28,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1396507553, now seen corresponding path program 42 times [2018-09-30 20:39:28,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:28,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:28,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:28,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:28,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:28,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:28,450 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:28,450 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:28,450 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:28,459 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:39:28,498 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-30 20:39:28,498 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:28,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:28,600 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:28,620 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:28,621 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-30 20:39:28,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 20:39:28,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 20:39:28,621 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:28,621 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-09-30 20:39:29,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:29,085 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 20:39:29,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 20:39:29,085 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-09-30 20:39:29,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:29,086 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:39:29,086 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:39:29,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:39:29,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:39:29,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 20:39:29,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 20:39:29,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 20:39:29,089 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-30 20:39:29,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:29,089 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 20:39:29,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 20:39:29,090 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 20:39:29,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 20:39:29,090 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:29,090 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-09-30 20:39:29,090 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:29,091 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:29,091 INFO L82 PathProgramCache]: Analyzing trace with hash 342059208, now seen corresponding path program 43 times [2018-09-30 20:39:29,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:29,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:29,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:29,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:29,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:29,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:29,433 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:29,433 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:29,433 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:29,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:29,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:29,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:29,577 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:29,597 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:29,598 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 20:39:29,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 20:39:29,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 20:39:29,598 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:29,598 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-09-30 20:39:29,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:29,958 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-30 20:39:29,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 20:39:29,958 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-09-30 20:39:29,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:29,959 INFO L225 Difference]: With dead ends: 50 [2018-09-30 20:39:29,959 INFO L226 Difference]: Without dead ends: 48 [2018-09-30 20:39:29,959 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:39:29,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-30 20:39:29,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-30 20:39:29,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 20:39:29,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-30 20:39:29,962 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-30 20:39:29,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:29,962 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-30 20:39:29,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 20:39:29,962 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-30 20:39:29,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 20:39:29,963 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:29,963 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-09-30 20:39:29,963 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:29,963 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:29,963 INFO L82 PathProgramCache]: Analyzing trace with hash 2013898881, now seen corresponding path program 44 times [2018-09-30 20:39:29,964 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:29,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:29,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:29,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:29,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:29,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:30,335 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:30,335 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:30,335 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:30,344 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:39:30,371 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:39:30,371 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:30,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:30,460 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:30,481 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:30,481 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 20:39:30,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 20:39:30,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 20:39:30,481 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:30,482 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-09-30 20:39:30,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:30,771 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 20:39:30,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 20:39:30,771 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-09-30 20:39:30,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:30,772 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:39:30,772 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:39:30,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:39:30,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:39:30,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 20:39:30,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 20:39:30,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-30 20:39:30,776 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-30 20:39:30,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:30,776 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-30 20:39:30,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 20:39:30,776 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-30 20:39:30,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 20:39:30,777 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:30,777 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-09-30 20:39:30,777 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:30,777 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:30,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1993646104, now seen corresponding path program 45 times [2018-09-30 20:39:30,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:30,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:30,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:30,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:30,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:30,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:31,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:31,038 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:31,038 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:31,046 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:39:31,081 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-30 20:39:31,081 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:31,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:31,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:31,205 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:31,206 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 20:39:31,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 20:39:31,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 20:39:31,206 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:31,206 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-09-30 20:39:31,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:31,657 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-30 20:39:31,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 20:39:31,657 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-09-30 20:39:31,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:31,658 INFO L225 Difference]: With dead ends: 52 [2018-09-30 20:39:31,658 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 20:39:31,659 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:39:31,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 20:39:31,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-30 20:39:31,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 20:39:31,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-30 20:39:31,661 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-30 20:39:31,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:31,662 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-30 20:39:31,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 20:39:31,662 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-30 20:39:31,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-30 20:39:31,662 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:31,662 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-09-30 20:39:31,662 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:31,662 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:31,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1673489055, now seen corresponding path program 46 times [2018-09-30 20:39:31,663 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:31,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:31,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:31,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:31,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:31,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:32,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:32,607 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:32,607 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:32,615 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:39:32,644 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:39:32,644 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:32,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:32,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:32,764 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:32,765 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-30 20:39:32,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 20:39:32,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 20:39:32,765 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:32,766 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-09-30 20:39:33,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:33,086 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 20:39:33,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 20:39:33,086 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-09-30 20:39:33,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:33,087 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:39:33,087 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:39:33,087 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:39:33,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:39:33,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 20:39:33,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 20:39:33,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 20:39:33,090 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-30 20:39:33,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:33,090 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 20:39:33,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 20:39:33,090 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 20:39:33,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 20:39:33,091 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:33,091 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-09-30 20:39:33,091 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:33,091 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:33,091 INFO L82 PathProgramCache]: Analyzing trace with hash -338555128, now seen corresponding path program 47 times [2018-09-30 20:39:33,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:33,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:33,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:33,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:33,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:33,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:33,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:33,533 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:33,533 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:33,542 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:39:33,582 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-30 20:39:33,582 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:33,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:33,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:33,707 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:33,707 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 20:39:33,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 20:39:33,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 20:39:33,708 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:33,708 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-09-30 20:39:34,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:34,092 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-30 20:39:34,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 20:39:34,092 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-09-30 20:39:34,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:34,093 INFO L225 Difference]: With dead ends: 54 [2018-09-30 20:39:34,093 INFO L226 Difference]: Without dead ends: 52 [2018-09-30 20:39:34,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:39:34,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-30 20:39:34,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-30 20:39:34,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 20:39:34,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-30 20:39:34,096 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-30 20:39:34,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:34,096 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-30 20:39:34,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 20:39:34,097 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-30 20:39:34,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-30 20:39:34,097 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:34,097 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-09-30 20:39:34,097 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:34,098 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:34,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1905276351, now seen corresponding path program 48 times [2018-09-30 20:39:34,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:34,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:34,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:34,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:34,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:34,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:34,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:34,488 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:34,488 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:34,495 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:39:34,541 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 20:39:34,541 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:34,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:34,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:34,686 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:34,686 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-30 20:39:34,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 20:39:34,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 20:39:34,687 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:34,687 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-09-30 20:39:34,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:34,919 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 20:39:34,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 20:39:34,919 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-09-30 20:39:34,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:34,920 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:39:34,920 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:39:34,920 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:39:34,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:39:34,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 20:39:34,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 20:39:34,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-30 20:39:34,923 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-30 20:39:34,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:34,924 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-30 20:39:34,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 20:39:34,924 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-30 20:39:34,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 20:39:34,924 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:34,924 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-09-30 20:39:34,925 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:34,925 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:34,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1065973288, now seen corresponding path program 49 times [2018-09-30 20:39:34,925 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:34,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:34,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:34,926 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:34,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:34,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:35,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:35,204 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:35,204 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:35,213 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:35,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:35,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:35,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:35,345 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:35,346 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 20:39:35,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 20:39:35,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 20:39:35,346 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:35,346 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-09-30 20:39:35,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:35,606 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-30 20:39:35,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 20:39:35,606 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-09-30 20:39:35,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:35,607 INFO L225 Difference]: With dead ends: 56 [2018-09-30 20:39:35,607 INFO L226 Difference]: Without dead ends: 54 [2018-09-30 20:39:35,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:39:35,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-30 20:39:35,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-30 20:39:35,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 20:39:35,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-30 20:39:35,610 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-30 20:39:35,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:35,610 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-30 20:39:35,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 20:39:35,610 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-30 20:39:35,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 20:39:35,611 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:35,611 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-09-30 20:39:35,611 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:35,611 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:35,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1314568415, now seen corresponding path program 50 times [2018-09-30 20:39:35,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:35,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:35,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:35,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:35,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:35,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:35,955 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:35,955 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:35,965 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:39:35,992 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:39:35,992 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:35,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:36,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:36,111 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:36,111 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 20:39:36,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 20:39:36,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 20:39:36,112 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:36,112 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-09-30 20:39:36,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:36,391 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 20:39:36,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 20:39:36,392 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-09-30 20:39:36,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:36,393 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:39:36,393 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 20:39:36,394 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:39:36,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 20:39:36,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 20:39:36,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 20:39:36,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-30 20:39:36,396 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-30 20:39:36,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:36,396 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-30 20:39:36,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 20:39:36,397 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-30 20:39:36,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 20:39:36,397 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:36,397 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-09-30 20:39:36,397 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:36,398 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:36,398 INFO L82 PathProgramCache]: Analyzing trace with hash -2096917176, now seen corresponding path program 51 times [2018-09-30 20:39:36,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:36,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:36,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:36,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:36,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:36,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:36,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:36,927 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:36,927 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:36,935 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:39:36,975 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-30 20:39:36,975 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:36,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:37,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:37,396 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:37,396 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 20:39:37,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 20:39:37,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 20:39:37,397 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:37,397 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-09-30 20:39:37,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:37,735 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-30 20:39:37,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 20:39:37,736 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-09-30 20:39:37,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:37,737 INFO L225 Difference]: With dead ends: 58 [2018-09-30 20:39:37,737 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 20:39:37,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:39:37,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 20:39:37,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-30 20:39:37,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 20:39:37,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-30 20:39:37,740 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-30 20:39:37,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:37,741 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-30 20:39:37,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 20:39:37,741 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-30 20:39:37,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-30 20:39:37,742 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:37,742 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-09-30 20:39:37,742 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:37,742 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:37,742 INFO L82 PathProgramCache]: Analyzing trace with hash -579924991, now seen corresponding path program 52 times [2018-09-30 20:39:37,743 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:37,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:37,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:37,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:37,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:37,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:38,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:38,022 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:38,022 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:38,029 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:39:38,060 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:39:38,060 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:38,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:38,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:38,175 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:38,176 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 20:39:38,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 20:39:38,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 20:39:38,176 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:38,176 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-09-30 20:39:38,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:38,517 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 20:39:38,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 20:39:38,517 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-09-30 20:39:38,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:38,518 INFO L225 Difference]: With dead ends: 59 [2018-09-30 20:39:38,518 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 20:39:38,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:39:38,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 20:39:38,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 20:39:38,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 20:39:38,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-30 20:39:38,521 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-30 20:39:38,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:38,521 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-30 20:39:38,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 20:39:38,522 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-30 20:39:38,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 20:39:38,522 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:38,522 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-09-30 20:39:38,522 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:38,522 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:38,523 INFO L82 PathProgramCache]: Analyzing trace with hash -797807512, now seen corresponding path program 53 times [2018-09-30 20:39:38,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:38,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:38,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:38,523 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:38,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:38,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:38,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:38,815 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:38,815 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:38,823 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:39:38,868 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-30 20:39:38,868 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:38,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:39,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:39,046 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:39,046 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 20:39:39,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 20:39:39,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 20:39:39,047 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:39,047 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-09-30 20:39:39,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:39,562 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-30 20:39:39,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 20:39:39,563 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-09-30 20:39:39,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:39,564 INFO L225 Difference]: With dead ends: 60 [2018-09-30 20:39:39,564 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 20:39:39,564 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:39:39,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 20:39:39,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-30 20:39:39,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 20:39:39,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-30 20:39:39,568 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-30 20:39:39,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:39,568 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-30 20:39:39,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 20:39:39,568 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-30 20:39:39,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-30 20:39:39,569 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:39,569 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-09-30 20:39:39,569 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:39,569 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:39,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1037768929, now seen corresponding path program 54 times [2018-09-30 20:39:39,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:39,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:39,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:39,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:39,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:39,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:40,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:40,074 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:40,074 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:40,081 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:39:40,121 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-30 20:39:40,121 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:40,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:40,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:40,344 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:40,345 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-30 20:39:40,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 20:39:40,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 20:39:40,345 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:40,345 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-09-30 20:39:40,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:40,682 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 20:39:40,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 20:39:40,683 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-09-30 20:39:40,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:40,683 INFO L225 Difference]: With dead ends: 61 [2018-09-30 20:39:40,684 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 20:39:40,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:39:40,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 20:39:40,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 20:39:40,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 20:39:40,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-30 20:39:40,686 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-30 20:39:40,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:40,687 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-30 20:39:40,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 20:39:40,687 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-30 20:39:40,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 20:39:40,687 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:40,688 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-09-30 20:39:40,688 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:40,688 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:40,689 INFO L82 PathProgramCache]: Analyzing trace with hash 2106063752, now seen corresponding path program 55 times [2018-09-30 20:39:40,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:40,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:40,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:40,689 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:40,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:40,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:41,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:41,139 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:41,139 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:41,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:41,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:41,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:41,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:41,292 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:41,292 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 20:39:41,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 20:39:41,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 20:39:41,293 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:41,293 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-09-30 20:39:41,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:41,677 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-30 20:39:41,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 20:39:41,678 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-09-30 20:39:41,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:41,679 INFO L225 Difference]: With dead ends: 62 [2018-09-30 20:39:41,679 INFO L226 Difference]: Without dead ends: 60 [2018-09-30 20:39:41,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:39:41,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-30 20:39:41,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-30 20:39:41,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-30 20:39:41,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-30 20:39:41,682 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-30 20:39:41,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:41,682 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-30 20:39:41,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 20:39:41,683 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-30 20:39:41,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-30 20:39:41,683 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:41,683 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-09-30 20:39:41,683 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:41,683 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:41,683 INFO L82 PathProgramCache]: Analyzing trace with hash 863464897, now seen corresponding path program 56 times [2018-09-30 20:39:41,684 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:41,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:41,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:41,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:41,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:41,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:42,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:42,115 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:42,115 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:42,123 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:39:42,156 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:39:42,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:42,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:42,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:42,270 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:42,270 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 20:39:42,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 20:39:42,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 20:39:42,271 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:42,271 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-09-30 20:39:42,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:42,611 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-30 20:39:42,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 20:39:42,612 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-09-30 20:39:42,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:42,613 INFO L225 Difference]: With dead ends: 63 [2018-09-30 20:39:42,613 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 20:39:42,613 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:39:42,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 20:39:42,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 20:39:42,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 20:39:42,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-30 20:39:42,617 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-30 20:39:42,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:42,617 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-30 20:39:42,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 20:39:42,617 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-30 20:39:42,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 20:39:42,618 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:42,618 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-09-30 20:39:42,618 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:42,618 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:42,618 INFO L82 PathProgramCache]: Analyzing trace with hash 997606056, now seen corresponding path program 57 times [2018-09-30 20:39:42,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:42,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:42,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:42,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:42,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:42,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:42,988 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:42,988 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:42,994 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:39:43,038 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-30 20:39:43,038 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:43,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:43,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:43,462 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:43,463 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-30 20:39:43,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 20:39:43,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 20:39:43,463 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:43,464 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-09-30 20:39:43,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:43,844 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-30 20:39:43,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 20:39:43,844 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-09-30 20:39:43,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:43,845 INFO L225 Difference]: With dead ends: 64 [2018-09-30 20:39:43,845 INFO L226 Difference]: Without dead ends: 62 [2018-09-30 20:39:43,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:39:43,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-30 20:39:43,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-30 20:39:43,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-30 20:39:43,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-30 20:39:43,849 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-30 20:39:43,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:43,849 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-30 20:39:43,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 20:39:43,849 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-30 20:39:43,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-30 20:39:43,849 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:43,849 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-09-30 20:39:43,850 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:43,850 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:43,850 INFO L82 PathProgramCache]: Analyzing trace with hash 861014689, now seen corresponding path program 58 times [2018-09-30 20:39:43,850 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:43,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:43,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:43,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:43,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:43,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:44,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:44,698 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:44,698 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:44,707 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:39:44,739 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:39:44,739 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:44,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:44,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:44,868 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:44,869 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-30 20:39:44,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 20:39:44,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 20:39:44,869 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:44,869 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-09-30 20:39:45,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:45,253 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 20:39:45,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 20:39:45,254 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-09-30 20:39:45,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:45,255 INFO L225 Difference]: With dead ends: 65 [2018-09-30 20:39:45,255 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 20:39:45,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:39:45,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 20:39:45,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 20:39:45,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 20:39:45,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-30 20:39:45,258 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-30 20:39:45,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:45,258 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-30 20:39:45,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 20:39:45,258 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-30 20:39:45,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 20:39:45,259 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:45,259 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-09-30 20:39:45,259 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:45,259 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:45,259 INFO L82 PathProgramCache]: Analyzing trace with hash 921649608, now seen corresponding path program 59 times [2018-09-30 20:39:45,259 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:45,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:45,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:45,260 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:45,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:45,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:45,645 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:45,645 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:45,653 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:39:45,700 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-30 20:39:45,701 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:45,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:45,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:45,929 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:45,929 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 20:39:45,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 20:39:45,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 20:39:45,930 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:45,930 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-09-30 20:39:46,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:46,348 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-30 20:39:46,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 20:39:46,348 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-09-30 20:39:46,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:46,349 INFO L225 Difference]: With dead ends: 66 [2018-09-30 20:39:46,349 INFO L226 Difference]: Without dead ends: 64 [2018-09-30 20:39:46,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:39:46,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-30 20:39:46,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-30 20:39:46,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-30 20:39:46,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-30 20:39:46,352 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-30 20:39:46,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:46,352 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-30 20:39:46,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 20:39:46,352 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-30 20:39:46,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-30 20:39:46,353 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:46,353 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-09-30 20:39:46,353 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:46,353 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:46,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1493635199, now seen corresponding path program 60 times [2018-09-30 20:39:46,353 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:46,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:46,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:46,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:46,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:46,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:46,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:46,909 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:46,909 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:46,916 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:39:46,963 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 20:39:46,963 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:46,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:47,106 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:47,106 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-30 20:39:47,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 20:39:47,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 20:39:47,107 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:47,107 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-09-30 20:39:47,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:47,442 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-30 20:39:47,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 20:39:47,443 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-09-30 20:39:47,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:47,444 INFO L225 Difference]: With dead ends: 67 [2018-09-30 20:39:47,444 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 20:39:47,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:39:47,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 20:39:47,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 20:39:47,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 20:39:47,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-30 20:39:47,447 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-30 20:39:47,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:47,447 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-30 20:39:47,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 20:39:47,447 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-30 20:39:47,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 20:39:47,447 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:47,448 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-09-30 20:39:47,448 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:47,448 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:47,448 INFO L82 PathProgramCache]: Analyzing trace with hash 941947112, now seen corresponding path program 61 times [2018-09-30 20:39:47,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:47,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:47,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:47,449 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:47,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:47,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:47,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:47,790 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:47,790 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:47,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:47,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:47,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:47,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:47,954 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:47,955 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 20:39:47,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 20:39:47,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 20:39:47,955 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:47,956 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-09-30 20:39:48,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:48,266 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-30 20:39:48,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 20:39:48,267 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-09-30 20:39:48,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:48,267 INFO L225 Difference]: With dead ends: 68 [2018-09-30 20:39:48,268 INFO L226 Difference]: Without dead ends: 66 [2018-09-30 20:39:48,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:39:48,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-30 20:39:48,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-30 20:39:48,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 20:39:48,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-30 20:39:48,269 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-30 20:39:48,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:48,270 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-30 20:39:48,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 20:39:48,270 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-30 20:39:48,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 20:39:48,270 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:48,270 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-09-30 20:39:48,270 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:48,270 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:48,271 INFO L82 PathProgramCache]: Analyzing trace with hash -864412575, now seen corresponding path program 62 times [2018-09-30 20:39:48,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:48,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:48,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:48,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:48,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:48,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:48,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:48,589 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:48,589 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:48,596 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:39:48,631 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:39:48,631 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:48,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:48,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:48,769 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:48,770 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-30 20:39:48,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 20:39:48,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 20:39:48,771 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:48,771 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-09-30 20:39:49,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:49,201 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 20:39:49,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 20:39:49,202 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-09-30 20:39:49,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:49,203 INFO L225 Difference]: With dead ends: 69 [2018-09-30 20:39:49,203 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 20:39:49,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:39:49,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 20:39:49,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 20:39:49,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 20:39:49,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-30 20:39:49,206 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-30 20:39:49,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:49,206 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-30 20:39:49,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 20:39:49,207 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-30 20:39:49,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 20:39:49,207 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:49,207 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-09-30 20:39:49,208 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:49,208 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:49,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1026988024, now seen corresponding path program 63 times [2018-09-30 20:39:49,208 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:49,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:49,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:49,209 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:49,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:49,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:49,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:49,784 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:49,784 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:49,793 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:39:49,843 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-30 20:39:49,843 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:49,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:49,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:49,979 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:49,979 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-30 20:39:49,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 20:39:49,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 20:39:49,980 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:49,980 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-09-30 20:39:50,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:50,451 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-30 20:39:50,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 20:39:50,452 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-09-30 20:39:50,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:50,452 INFO L225 Difference]: With dead ends: 70 [2018-09-30 20:39:50,452 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 20:39:50,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:39:50,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 20:39:50,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-30 20:39:50,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-30 20:39:50,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-30 20:39:50,455 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-30 20:39:50,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:50,455 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-30 20:39:50,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 20:39:50,455 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-30 20:39:50,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-30 20:39:50,456 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:50,456 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-09-30 20:39:50,456 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:50,456 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:50,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1771859647, now seen corresponding path program 64 times [2018-09-30 20:39:50,456 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:50,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:50,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:50,457 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:50,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:50,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:50,781 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:50,781 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:50,800 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:39:50,858 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:39:50,859 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:50,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:50,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:51,001 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:51,002 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-30 20:39:51,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 20:39:51,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 20:39:51,003 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:51,003 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-09-30 20:39:51,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:51,451 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-30 20:39:51,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 20:39:51,451 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-09-30 20:39:51,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:51,452 INFO L225 Difference]: With dead ends: 71 [2018-09-30 20:39:51,452 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 20:39:51,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:39:51,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 20:39:51,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 20:39:51,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 20:39:51,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-30 20:39:51,456 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-30 20:39:51,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:51,456 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-30 20:39:51,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 20:39:51,457 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-30 20:39:51,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 20:39:51,469 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:51,470 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-09-30 20:39:51,470 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:51,470 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:51,471 INFO L82 PathProgramCache]: Analyzing trace with hash 906923816, now seen corresponding path program 65 times [2018-09-30 20:39:51,471 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:51,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:51,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:51,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:51,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:51,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:52,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:52,190 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:52,190 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:52,197 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:39:52,251 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-30 20:39:52,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:52,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:52,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:52,434 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:52,434 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 20:39:52,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 20:39:52,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 20:39:52,435 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:52,435 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-09-30 20:39:52,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:52,856 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-30 20:39:52,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 20:39:52,856 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-09-30 20:39:52,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:52,857 INFO L225 Difference]: With dead ends: 72 [2018-09-30 20:39:52,857 INFO L226 Difference]: Without dead ends: 70 [2018-09-30 20:39:52,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:39:52,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-30 20:39:52,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-30 20:39:52,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 20:39:52,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-30 20:39:52,860 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-30 20:39:52,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:52,861 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-30 20:39:52,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 20:39:52,861 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-30 20:39:52,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-30 20:39:52,861 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:52,861 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-09-30 20:39:52,861 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:52,861 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:52,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1950134751, now seen corresponding path program 66 times [2018-09-30 20:39:52,862 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:52,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:52,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:52,862 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:52,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:52,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:53,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:53,204 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:53,204 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:53,211 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:39:53,261 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-30 20:39:53,261 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:53,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:53,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:53,408 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:53,409 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-30 20:39:53,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 20:39:53,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 20:39:53,410 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:53,410 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-09-30 20:39:53,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:53,691 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-30 20:39:53,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 20:39:53,692 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-09-30 20:39:53,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:53,692 INFO L225 Difference]: With dead ends: 73 [2018-09-30 20:39:53,693 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 20:39:53,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:39:53,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 20:39:53,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 20:39:53,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 20:39:53,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-30 20:39:53,695 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-30 20:39:53,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:53,696 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-30 20:39:53,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 20:39:53,696 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-30 20:39:53,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 20:39:53,696 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:53,697 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-09-30 20:39:53,697 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:53,697 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:53,697 INFO L82 PathProgramCache]: Analyzing trace with hash -324637112, now seen corresponding path program 67 times [2018-09-30 20:39:53,697 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:53,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:53,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:53,698 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:53,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:53,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:54,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:54,023 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:54,023 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:54,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:54,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:54,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:54,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:54,206 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:54,207 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 20:39:54,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 20:39:54,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 20:39:54,208 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:54,208 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-09-30 20:39:54,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:54,843 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-30 20:39:54,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 20:39:54,844 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-09-30 20:39:54,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:54,845 INFO L225 Difference]: With dead ends: 74 [2018-09-30 20:39:54,845 INFO L226 Difference]: Without dead ends: 72 [2018-09-30 20:39:54,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:39:54,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-30 20:39:54,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-30 20:39:54,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-30 20:39:54,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-30 20:39:54,848 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-30 20:39:54,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:54,849 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-30 20:39:54,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 20:39:54,849 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-30 20:39:54,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-30 20:39:54,849 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:54,849 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-09-30 20:39:54,849 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:54,849 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:54,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1473817855, now seen corresponding path program 68 times [2018-09-30 20:39:54,850 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:54,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:54,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:54,850 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:54,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:54,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:55,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:55,178 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:55,178 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:55,185 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:39:55,224 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:39:55,224 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:55,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:55,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:55,373 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:55,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-30 20:39:55,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 20:39:55,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 20:39:55,375 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:55,375 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-09-30 20:39:55,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:55,687 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-30 20:39:55,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 20:39:55,688 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-09-30 20:39:55,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:55,689 INFO L225 Difference]: With dead ends: 75 [2018-09-30 20:39:55,689 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 20:39:55,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:39:55,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 20:39:55,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 20:39:55,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 20:39:55,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-30 20:39:55,692 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-30 20:39:55,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:55,692 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-30 20:39:55,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 20:39:55,693 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-30 20:39:55,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 20:39:55,693 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:55,693 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-09-30 20:39:55,693 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:55,693 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:55,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1556284776, now seen corresponding path program 69 times [2018-09-30 20:39:55,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:55,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:55,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:55,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:55,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:55,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:56,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:56,096 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:56,096 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:56,103 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:39:56,457 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-30 20:39:56,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:56,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:56,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:56,867 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:56,867 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-30 20:39:56,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 20:39:56,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 20:39:56,868 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:56,868 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-09-30 20:39:57,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:57,384 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-30 20:39:57,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 20:39:57,384 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-09-30 20:39:57,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:57,385 INFO L225 Difference]: With dead ends: 76 [2018-09-30 20:39:57,385 INFO L226 Difference]: Without dead ends: 74 [2018-09-30 20:39:57,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:39:57,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-30 20:39:57,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-30 20:39:57,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-30 20:39:57,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-30 20:39:57,388 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-30 20:39:57,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:57,389 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-30 20:39:57,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 20:39:57,389 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-30 20:39:57,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-30 20:39:57,389 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:57,389 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-09-30 20:39:57,390 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:57,390 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:57,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1000185825, now seen corresponding path program 70 times [2018-09-30 20:39:57,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:57,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:57,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:57,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:57,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:57,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:57,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:57,754 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:57,754 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:57,761 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:39:57,810 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:39:57,810 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:57,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:57,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:57,987 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:57,987 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-30 20:39:57,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 20:39:57,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 20:39:57,988 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:57,988 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-09-30 20:39:58,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:58,362 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-30 20:39:58,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 20:39:58,363 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-09-30 20:39:58,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:58,364 INFO L225 Difference]: With dead ends: 77 [2018-09-30 20:39:58,364 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 20:39:58,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:39:58,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 20:39:58,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 20:39:58,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 20:39:58,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-30 20:39:58,367 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-30 20:39:58,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:58,367 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-30 20:39:58,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 20:39:58,367 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-30 20:39:58,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 20:39:58,368 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:58,368 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-09-30 20:39:58,368 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:58,368 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:58,369 INFO L82 PathProgramCache]: Analyzing trace with hash 940987528, now seen corresponding path program 71 times [2018-09-30 20:39:58,369 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:58,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:58,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:58,369 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:58,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:58,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:58,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:58,744 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:58,744 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:58,751 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:39:58,812 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-30 20:39:58,812 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:58,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:59,216 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:59,216 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-30 20:39:59,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 20:39:59,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 20:39:59,217 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:59,217 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-09-30 20:39:59,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:59,865 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-30 20:39:59,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 20:39:59,866 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-09-30 20:39:59,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:59,867 INFO L225 Difference]: With dead ends: 78 [2018-09-30 20:39:59,867 INFO L226 Difference]: Without dead ends: 76 [2018-09-30 20:39:59,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:39:59,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-30 20:39:59,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-30 20:39:59,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-30 20:39:59,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-30 20:39:59,871 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-30 20:39:59,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:59,872 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-30 20:39:59,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 20:39:59,872 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-30 20:39:59,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-30 20:39:59,873 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:59,873 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-09-30 20:39:59,873 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:59,873 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:59,873 INFO L82 PathProgramCache]: Analyzing trace with hash -894159679, now seen corresponding path program 72 times [2018-09-30 20:39:59,873 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:59,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:59,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:59,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:59,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:59,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:00,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:00,337 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:00,337 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:00,344 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:40:00,406 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 20:40:00,406 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:00,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:00,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:00,575 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:00,575 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-30 20:40:00,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 20:40:00,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 20:40:00,576 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:00,576 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-09-30 20:40:01,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:01,075 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-30 20:40:01,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 20:40:01,075 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-09-30 20:40:01,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:01,076 INFO L225 Difference]: With dead ends: 79 [2018-09-30 20:40:01,076 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 20:40:01,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:40:01,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 20:40:01,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 20:40:01,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 20:40:01,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-30 20:40:01,080 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-09-30 20:40:01,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:01,080 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-30 20:40:01,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 20:40:01,081 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-30 20:40:01,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 20:40:01,081 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:01,081 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-09-30 20:40:01,081 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:01,082 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:01,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1949148248, now seen corresponding path program 73 times [2018-09-30 20:40:01,082 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:01,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:01,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:01,083 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:01,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:01,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:02,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:02,589 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:02,589 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:02,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:02,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:02,644 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:02,824 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:02,825 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-30 20:40:02,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 20:40:02,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 20:40:02,826 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:02,826 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-09-30 20:40:03,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:03,347 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-09-30 20:40:03,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 20:40:03,348 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-09-30 20:40:03,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:03,348 INFO L225 Difference]: With dead ends: 80 [2018-09-30 20:40:03,349 INFO L226 Difference]: Without dead ends: 78 [2018-09-30 20:40:03,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time [2018-09-30 20:40:03,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-30 20:40:03,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-30 20:40:03,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-30 20:40:03,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-30 20:40:03,351 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-09-30 20:40:03,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:03,351 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-30 20:40:03,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 20:40:03,352 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-30 20:40:03,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-30 20:40:03,352 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:03,352 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-09-30 20:40:03,353 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:03,353 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:03,353 INFO L82 PathProgramCache]: Analyzing trace with hash -294055519, now seen corresponding path program 74 times [2018-09-30 20:40:03,353 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:03,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:03,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:03,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:03,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:03,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:03,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:03,755 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:03,755 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:03,762 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:40:03,810 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:40:03,810 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:03,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:03,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:04,004 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:04,004 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-30 20:40:04,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 20:40:04,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 20:40:04,005 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:04,005 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-09-30 20:40:04,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:04,517 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-30 20:40:04,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 20:40:04,518 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-09-30 20:40:04,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:04,518 INFO L225 Difference]: With dead ends: 81 [2018-09-30 20:40:04,519 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 20:40:04,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:40:04,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 20:40:04,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 20:40:04,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 20:40:04,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-30 20:40:04,522 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-09-30 20:40:04,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:04,523 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-30 20:40:04,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 20:40:04,523 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-30 20:40:04,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 20:40:04,523 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:04,523 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-09-30 20:40:04,523 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:04,524 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:04,524 INFO L82 PathProgramCache]: Analyzing trace with hash -525788472, now seen corresponding path program 75 times [2018-09-30 20:40:04,524 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:04,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:04,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:04,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:04,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:05,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:05,659 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:05,659 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:05,665 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:40:05,725 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-30 20:40:05,725 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:05,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:05,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:05,886 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:05,886 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-30 20:40:05,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 20:40:05,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 20:40:05,887 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:05,887 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-09-30 20:40:07,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:07,458 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-09-30 20:40:07,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 20:40:07,459 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-09-30 20:40:07,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:07,459 INFO L225 Difference]: With dead ends: 82 [2018-09-30 20:40:07,459 INFO L226 Difference]: Without dead ends: 80 [2018-09-30 20:40:07,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-09-30 20:40:07,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-30 20:40:07,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-30 20:40:07,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-30 20:40:07,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-30 20:40:07,463 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-09-30 20:40:07,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:07,463 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-30 20:40:07,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 20:40:07,463 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-30 20:40:07,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-30 20:40:07,464 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:07,464 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-09-30 20:40:07,464 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:07,464 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:07,464 INFO L82 PathProgramCache]: Analyzing trace with hash 880424577, now seen corresponding path program 76 times [2018-09-30 20:40:07,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:07,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:07,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:07,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:07,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:07,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:08,025 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:08,025 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:08,031 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:40:08,084 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:40:08,085 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:08,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:08,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:08,305 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:08,305 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-30 20:40:08,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 20:40:08,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 20:40:08,306 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:08,306 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-09-30 20:40:09,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:09,337 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-30 20:40:09,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 20:40:09,337 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-09-30 20:40:09,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:09,338 INFO L225 Difference]: With dead ends: 83 [2018-09-30 20:40:09,338 INFO L226 Difference]: Without dead ends: 81 [2018-09-30 20:40:09,338 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:40:09,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-30 20:40:09,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-30 20:40:09,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 20:40:09,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-30 20:40:09,340 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-09-30 20:40:09,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:09,341 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-30 20:40:09,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-30 20:40:09,341 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-30 20:40:09,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 20:40:09,341 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:09,341 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-09-30 20:40:09,342 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:09,342 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:09,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1523356136, now seen corresponding path program 77 times [2018-09-30 20:40:09,342 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:09,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:09,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:09,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:09,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:09,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:09,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:09,845 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:09,845 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:09,852 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:40:09,968 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-30 20:40:09,968 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:09,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:10,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:10,237 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:10,237 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-30 20:40:10,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 20:40:10,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 20:40:10,238 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:10,238 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-09-30 20:40:10,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:10,811 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-09-30 20:40:10,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 20:40:10,812 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-09-30 20:40:10,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:10,813 INFO L225 Difference]: With dead ends: 84 [2018-09-30 20:40:10,813 INFO L226 Difference]: Without dead ends: 82 [2018-09-30 20:40:10,813 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:40:10,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-30 20:40:10,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-30 20:40:10,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-30 20:40:10,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-30 20:40:10,816 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-09-30 20:40:10,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:10,816 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-30 20:40:10,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 20:40:10,816 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-30 20:40:10,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-30 20:40:10,817 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:10,817 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-09-30 20:40:10,817 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:10,817 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:10,818 INFO L82 PathProgramCache]: Analyzing trace with hash -20602015, now seen corresponding path program 78 times [2018-09-30 20:40:10,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:10,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:10,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:10,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:10,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:10,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:11,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:11,834 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:11,834 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:11,844 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:40:12,095 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-30 20:40:12,095 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:12,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:12,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:12,280 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:12,280 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-30 20:40:12,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-30 20:40:12,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-30 20:40:12,281 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:12,282 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-09-30 20:40:12,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:12,667 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-30 20:40:12,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 20:40:12,668 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-09-30 20:40:12,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:12,668 INFO L225 Difference]: With dead ends: 85 [2018-09-30 20:40:12,669 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 20:40:12,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:40:12,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 20:40:12,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 20:40:12,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 20:40:12,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-30 20:40:12,671 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-09-30 20:40:12,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:12,671 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-30 20:40:12,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-30 20:40:12,672 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-30 20:40:12,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 20:40:12,672 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:12,672 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-09-30 20:40:12,672 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:12,672 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:12,673 INFO L82 PathProgramCache]: Analyzing trace with hash -638664440, now seen corresponding path program 79 times [2018-09-30 20:40:12,673 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:12,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:12,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:12,673 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:12,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:12,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:13,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:13,728 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:13,728 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:13,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:13,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:13,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:13,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:13,938 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:13,939 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-30 20:40:13,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 20:40:13,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 20:40:13,940 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:13,940 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-09-30 20:40:14,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:14,456 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-09-30 20:40:14,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 20:40:14,456 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-09-30 20:40:14,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:14,457 INFO L225 Difference]: With dead ends: 86 [2018-09-30 20:40:14,457 INFO L226 Difference]: Without dead ends: 84 [2018-09-30 20:40:14,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:40:14,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-30 20:40:14,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-30 20:40:14,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-30 20:40:14,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-30 20:40:14,460 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-09-30 20:40:14,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:14,460 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-30 20:40:14,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 20:40:14,460 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-30 20:40:14,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-30 20:40:14,461 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:14,461 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-09-30 20:40:14,461 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:14,461 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:14,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1676236865, now seen corresponding path program 80 times [2018-09-30 20:40:14,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:14,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:14,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:14,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:14,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:14,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:14,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:14,975 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:14,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:14,982 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:40:15,027 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:40:15,027 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:15,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:16,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:16,510 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:16,510 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-30 20:40:16,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 20:40:16,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 20:40:16,511 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:16,511 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-09-30 20:40:17,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:17,090 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-30 20:40:17,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 20:40:17,090 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-09-30 20:40:17,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:17,091 INFO L225 Difference]: With dead ends: 87 [2018-09-30 20:40:17,091 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 20:40:17,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time [2018-09-30 20:40:17,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 20:40:17,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 20:40:17,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 20:40:17,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-30 20:40:17,093 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-09-30 20:40:17,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:17,094 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-30 20:40:17,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 20:40:17,094 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-30 20:40:17,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-30 20:40:17,094 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:17,094 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-09-30 20:40:17,094 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:17,094 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:17,095 INFO L82 PathProgramCache]: Analyzing trace with hash 423733288, now seen corresponding path program 81 times [2018-09-30 20:40:17,095 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:17,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:17,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:17,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:17,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:17,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:17,810 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:17,810 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:17,818 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:40:17,883 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-30 20:40:17,883 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:17,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:18,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:18,141 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:18,141 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-30 20:40:18,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 20:40:18,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 20:40:18,142 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:18,142 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-09-30 20:40:18,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:18,607 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-09-30 20:40:18,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 20:40:18,608 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-09-30 20:40:18,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:18,609 INFO L225 Difference]: With dead ends: 88 [2018-09-30 20:40:18,609 INFO L226 Difference]: Without dead ends: 86 [2018-09-30 20:40:18,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:40:18,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-30 20:40:18,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-30 20:40:18,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-30 20:40:18,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-30 20:40:18,611 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-09-30 20:40:18,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:18,611 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-30 20:40:18,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 20:40:18,611 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-30 20:40:18,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-30 20:40:18,612 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:18,612 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-09-30 20:40:18,612 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:18,612 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:18,612 INFO L82 PathProgramCache]: Analyzing trace with hash 250828065, now seen corresponding path program 82 times [2018-09-30 20:40:18,612 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:18,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:18,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:18,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:18,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:18,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:19,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:19,170 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:19,170 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:19,178 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:40:19,232 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:40:19,233 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:19,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:20,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:20,494 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:20,494 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-30 20:40:20,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-30 20:40:20,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-30 20:40:20,495 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:20,495 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-09-30 20:40:21,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:21,148 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-30 20:40:21,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 20:40:21,149 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-09-30 20:40:21,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:21,149 INFO L225 Difference]: With dead ends: 89 [2018-09-30 20:40:21,149 INFO L226 Difference]: Without dead ends: 87 [2018-09-30 20:40:21,150 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time [2018-09-30 20:40:21,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-30 20:40:21,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-30 20:40:21,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-30 20:40:21,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-30 20:40:21,152 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-09-30 20:40:21,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:21,152 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-30 20:40:21,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-30 20:40:21,152 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-30 20:40:21,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 20:40:21,153 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:21,153 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-09-30 20:40:21,154 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:21,154 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:21,154 INFO L82 PathProgramCache]: Analyzing trace with hash -814266552, now seen corresponding path program 83 times [2018-09-30 20:40:21,154 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:21,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:21,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:21,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:21,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:21,600 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:21,600 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:21,607 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:40:21,681 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-30 20:40:21,681 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:21,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:21,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:21,859 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:21,860 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-30 20:40:21,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 20:40:21,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 20:40:21,861 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:21,861 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-09-30 20:40:22,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:22,454 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-09-30 20:40:22,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 20:40:22,455 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-09-30 20:40:22,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:22,456 INFO L225 Difference]: With dead ends: 90 [2018-09-30 20:40:22,456 INFO L226 Difference]: Without dead ends: 88 [2018-09-30 20:40:22,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:40:22,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-30 20:40:22,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-30 20:40:22,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-30 20:40:22,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-30 20:40:22,459 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-09-30 20:40:22,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:22,459 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-30 20:40:22,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 20:40:22,459 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-30 20:40:22,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-30 20:40:22,460 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:22,460 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-09-30 20:40:22,460 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:22,461 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:22,461 INFO L82 PathProgramCache]: Analyzing trace with hash 527538689, now seen corresponding path program 84 times [2018-09-30 20:40:22,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:22,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:22,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:22,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:22,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:23,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:23,182 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:23,182 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:23,190 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:40:23,261 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-30 20:40:23,261 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:23,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:23,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:23,435 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:23,436 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-30 20:40:23,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-30 20:40:23,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-30 20:40:23,437 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:23,437 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-09-30 20:40:23,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:23,898 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-30 20:40:23,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 20:40:23,899 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-09-30 20:40:23,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:23,899 INFO L225 Difference]: With dead ends: 91 [2018-09-30 20:40:23,899 INFO L226 Difference]: Without dead ends: 89 [2018-09-30 20:40:23,900 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:40:23,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-30 20:40:23,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-30 20:40:23,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-30 20:40:23,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-30 20:40:23,902 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-09-30 20:40:23,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:23,902 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-30 20:40:23,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-30 20:40:23,902 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-30 20:40:23,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-30 20:40:23,903 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:23,903 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-09-30 20:40:23,904 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:23,904 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:23,904 INFO L82 PathProgramCache]: Analyzing trace with hash -826171800, now seen corresponding path program 85 times [2018-09-30 20:40:23,904 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:23,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:23,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:23,905 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:23,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:24,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:24,494 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:24,494 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:24,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:24,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:24,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:24,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:24,718 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:24,718 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-30 20:40:24,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 20:40:24,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 20:40:24,719 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:24,720 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-09-30 20:40:25,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:25,141 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-09-30 20:40:25,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-30 20:40:25,141 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-09-30 20:40:25,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:25,142 INFO L225 Difference]: With dead ends: 92 [2018-09-30 20:40:25,142 INFO L226 Difference]: Without dead ends: 90 [2018-09-30 20:40:25,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:40:25,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-30 20:40:25,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-30 20:40:25,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-30 20:40:25,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-30 20:40:25,144 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-09-30 20:40:25,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:25,145 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-30 20:40:25,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 20:40:25,145 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-30 20:40:25,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-30 20:40:25,146 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:25,146 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-09-30 20:40:25,146 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:25,146 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:25,146 INFO L82 PathProgramCache]: Analyzing trace with hash 158476001, now seen corresponding path program 86 times [2018-09-30 20:40:25,146 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:25,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:25,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:25,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:25,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:25,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:25,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:25,783 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:25,783 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:25,791 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:40:25,839 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:40:25,839 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:25,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:26,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:26,025 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:26,025 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-30 20:40:26,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 20:40:26,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 20:40:26,027 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:26,027 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-09-30 20:40:26,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:26,407 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-30 20:40:26,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 20:40:26,407 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-09-30 20:40:26,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:26,408 INFO L225 Difference]: With dead ends: 93 [2018-09-30 20:40:26,408 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 20:40:26,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:40:26,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 20:40:26,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 20:40:26,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 20:40:26,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-30 20:40:26,410 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-09-30 20:40:26,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:26,410 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-30 20:40:26,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 20:40:26,411 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-30 20:40:26,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 20:40:26,411 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:26,411 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-09-30 20:40:26,411 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:26,411 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:26,412 INFO L82 PathProgramCache]: Analyzing trace with hash 617786760, now seen corresponding path program 87 times [2018-09-30 20:40:26,412 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:26,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:26,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:26,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:26,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:26,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:26,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:26,979 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:26,979 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:26,986 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:40:27,061 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-30 20:40:27,061 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:27,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:27,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:27,239 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:27,240 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-30 20:40:27,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 20:40:27,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 20:40:27,241 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:27,241 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-09-30 20:40:27,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:27,612 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-09-30 20:40:27,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 20:40:27,613 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-09-30 20:40:27,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:27,614 INFO L225 Difference]: With dead ends: 94 [2018-09-30 20:40:27,614 INFO L226 Difference]: Without dead ends: 92 [2018-09-30 20:40:27,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:40:27,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-30 20:40:27,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-30 20:40:27,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-30 20:40:27,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-30 20:40:27,617 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-09-30 20:40:27,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:27,617 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-30 20:40:27,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 20:40:27,617 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-30 20:40:27,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-30 20:40:27,618 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:27,618 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-09-30 20:40:27,618 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:27,618 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:27,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1971518401, now seen corresponding path program 88 times [2018-09-30 20:40:27,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:27,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:27,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:27,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:27,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:27,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:28,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:28,232 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:28,232 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:28,239 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:40:28,286 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:40:28,286 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:28,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:28,469 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:28,469 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-30 20:40:28,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-30 20:40:28,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-30 20:40:28,470 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:28,470 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-09-30 20:40:28,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:28,863 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-30 20:40:28,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 20:40:28,863 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-09-30 20:40:28,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:28,864 INFO L225 Difference]: With dead ends: 95 [2018-09-30 20:40:28,864 INFO L226 Difference]: Without dead ends: 93 [2018-09-30 20:40:28,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:40:28,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-30 20:40:28,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-30 20:40:28,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-30 20:40:28,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-30 20:40:28,866 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-09-30 20:40:28,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:28,867 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-30 20:40:28,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-30 20:40:28,867 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-30 20:40:28,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 20:40:28,867 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:28,867 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-09-30 20:40:28,868 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:28,868 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:28,868 INFO L82 PathProgramCache]: Analyzing trace with hash 987526312, now seen corresponding path program 89 times [2018-09-30 20:40:28,868 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:28,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:28,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:28,868 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:28,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:28,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:29,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:29,343 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:29,343 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:29,350 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:40:29,429 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-30 20:40:29,429 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:29,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:29,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:29,619 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:29,619 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-30 20:40:29,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 20:40:29,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 20:40:29,621 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:29,621 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-09-30 20:40:30,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:30,039 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-09-30 20:40:30,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-30 20:40:30,039 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-09-30 20:40:30,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:30,040 INFO L225 Difference]: With dead ends: 96 [2018-09-30 20:40:30,040 INFO L226 Difference]: Without dead ends: 94 [2018-09-30 20:40:30,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:40:30,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-30 20:40:30,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-30 20:40:30,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-30 20:40:30,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-30 20:40:30,042 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-09-30 20:40:30,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:30,042 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-30 20:40:30,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 20:40:30,043 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-30 20:40:30,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-30 20:40:30,043 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:30,043 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-09-30 20:40:30,043 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:30,043 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:30,043 INFO L82 PathProgramCache]: Analyzing trace with hash 548542625, now seen corresponding path program 90 times [2018-09-30 20:40:30,044 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:30,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:30,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:30,045 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:30,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:30,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:30,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:30,780 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:30,780 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:30,787 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:40:30,881 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-30 20:40:30,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:30,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:31,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:31,062 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:31,063 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-30 20:40:31,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-30 20:40:31,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-30 20:40:31,064 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:31,064 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-09-30 20:40:31,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:31,561 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-30 20:40:31,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 20:40:31,562 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-09-30 20:40:31,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:31,562 INFO L225 Difference]: With dead ends: 97 [2018-09-30 20:40:31,563 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 20:40:31,563 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:40:31,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 20:40:31,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-30 20:40:31,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 20:40:31,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-30 20:40:31,566 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-09-30 20:40:31,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:31,566 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-30 20:40:31,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-30 20:40:31,566 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-30 20:40:31,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-30 20:40:31,567 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:31,567 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-09-30 20:40:31,567 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:31,568 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:31,568 INFO L82 PathProgramCache]: Analyzing trace with hash -175049784, now seen corresponding path program 91 times [2018-09-30 20:40:31,568 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:31,568 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:31,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:31,569 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:31,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:31,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:32,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:32,266 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:32,266 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:32,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:32,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:32,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:32,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:32,506 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:32,507 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-30 20:40:32,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 20:40:32,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 20:40:32,508 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:32,508 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-09-30 20:40:33,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:33,189 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-09-30 20:40:33,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 20:40:33,189 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-09-30 20:40:33,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:33,190 INFO L225 Difference]: With dead ends: 98 [2018-09-30 20:40:33,190 INFO L226 Difference]: Without dead ends: 96 [2018-09-30 20:40:33,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:40:33,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-30 20:40:33,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-30 20:40:33,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-30 20:40:33,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-30 20:40:33,193 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-09-30 20:40:33,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:33,193 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-30 20:40:33,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 20:40:33,194 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-30 20:40:33,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-30 20:40:33,194 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:33,194 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-09-30 20:40:33,194 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:33,195 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:33,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1131577983, now seen corresponding path program 92 times [2018-09-30 20:40:33,195 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:33,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:33,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:33,195 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:33,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:33,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:33,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:33,677 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:33,677 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:33,684 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:40:33,734 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:40:33,734 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:33,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:33,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:33,922 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:33,923 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-30 20:40:33,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-30 20:40:33,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-30 20:40:33,924 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:33,924 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-09-30 20:40:34,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:34,354 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-30 20:40:34,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 20:40:34,354 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-09-30 20:40:34,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:34,355 INFO L225 Difference]: With dead ends: 99 [2018-09-30 20:40:34,355 INFO L226 Difference]: Without dead ends: 97 [2018-09-30 20:40:34,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:40:34,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-30 20:40:34,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-30 20:40:34,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 20:40:34,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-30 20:40:34,357 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-09-30 20:40:34,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:34,357 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-30 20:40:34,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-30 20:40:34,357 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-30 20:40:34,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-30 20:40:34,357 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:34,358 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-09-30 20:40:34,358 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:34,358 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:34,358 INFO L82 PathProgramCache]: Analyzing trace with hash -719181080, now seen corresponding path program 93 times [2018-09-30 20:40:34,358 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:34,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:34,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:34,359 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:34,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:34,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:35,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:35,026 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:35,026 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:35,033 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:40:35,114 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-30 20:40:35,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:35,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:35,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:35,740 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:35,740 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-30 20:40:35,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 20:40:35,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 20:40:35,741 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:35,741 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-09-30 20:40:36,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:36,329 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-09-30 20:40:36,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 20:40:36,329 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-09-30 20:40:36,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:36,330 INFO L225 Difference]: With dead ends: 100 [2018-09-30 20:40:36,330 INFO L226 Difference]: Without dead ends: 98 [2018-09-30 20:40:36,330 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-09-30 20:40:36,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-30 20:40:36,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-30 20:40:36,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-30 20:40:36,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-30 20:40:36,332 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-09-30 20:40:36,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:36,332 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-30 20:40:36,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 20:40:36,333 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-30 20:40:36,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-30 20:40:36,333 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:36,333 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-09-30 20:40:36,333 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:36,333 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:36,333 INFO L82 PathProgramCache]: Analyzing trace with hash -819778975, now seen corresponding path program 94 times [2018-09-30 20:40:36,334 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:36,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:36,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:36,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:36,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:36,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:36,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:36,836 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:36,836 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:36,844 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:40:36,896 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:40:36,896 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:36,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:37,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:37,221 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:37,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-30 20:40:37,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-30 20:40:37,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-30 20:40:37,223 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:37,223 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-09-30 20:40:37,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:37,645 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-30 20:40:37,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 20:40:37,645 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-09-30 20:40:37,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:37,646 INFO L225 Difference]: With dead ends: 101 [2018-09-30 20:40:37,646 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 20:40:37,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:40:37,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 20:40:37,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-30 20:40:37,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-30 20:40:37,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-30 20:40:37,648 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-09-30 20:40:37,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:37,648 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-30 20:40:37,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-30 20:40:37,648 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-30 20:40:37,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 20:40:37,649 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:37,649 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-09-30 20:40:37,649 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:37,649 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:37,649 INFO L82 PathProgramCache]: Analyzing trace with hash 356653576, now seen corresponding path program 95 times [2018-09-30 20:40:37,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:37,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:37,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:37,650 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:37,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:37,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:38,163 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:38,163 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:38,171 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:40:38,261 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-30 20:40:38,261 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:38,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:38,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:38,460 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:38,460 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-30 20:40:38,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 20:40:38,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 20:40:38,462 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:38,462 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-09-30 20:40:39,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:39,113 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-09-30 20:40:39,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-30 20:40:39,113 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-09-30 20:40:39,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:39,114 INFO L225 Difference]: With dead ends: 102 [2018-09-30 20:40:39,114 INFO L226 Difference]: Without dead ends: 100 [2018-09-30 20:40:39,114 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:40:39,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-30 20:40:39,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-30 20:40:39,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-30 20:40:39,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-30 20:40:39,117 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-09-30 20:40:39,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:39,117 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-30 20:40:39,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 20:40:39,117 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-30 20:40:39,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-30 20:40:39,117 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:39,117 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-09-30 20:40:39,118 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:39,118 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:39,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1828643007, now seen corresponding path program 96 times [2018-09-30 20:40:39,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:39,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:39,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:39,119 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:39,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:39,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:39,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:39,668 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:39,668 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:39,675 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:40:39,760 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-30 20:40:39,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:39,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:39,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:39,956 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:39,957 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-30 20:40:39,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-30 20:40:39,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-30 20:40:39,958 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:39,958 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-09-30 20:40:40,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:40,491 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-30 20:40:40,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 20:40:40,491 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-09-30 20:40:40,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:40,492 INFO L225 Difference]: With dead ends: 103 [2018-09-30 20:40:40,492 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 20:40:40,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:40:40,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 20:40:40,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 20:40:40,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 20:40:40,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-30 20:40:40,496 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-09-30 20:40:40,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:40,496 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-30 20:40:40,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-30 20:40:40,496 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-30 20:40:40,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 20:40:40,496 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:40,497 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-09-30 20:40:40,497 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:40,497 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:40,497 INFO L82 PathProgramCache]: Analyzing trace with hash -853360344, now seen corresponding path program 97 times [2018-09-30 20:40:40,497 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:40,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:40,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:40,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:40,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:40,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:41,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:41,197 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:41,197 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:41,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:41,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:41,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:41,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:41,452 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:41,452 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-30 20:40:41,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 20:40:41,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 20:40:41,454 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:41,454 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-09-30 20:40:41,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:41,902 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-09-30 20:40:41,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-30 20:40:41,902 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-09-30 20:40:41,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:41,903 INFO L225 Difference]: With dead ends: 104 [2018-09-30 20:40:41,903 INFO L226 Difference]: Without dead ends: 102 [2018-09-30 20:40:41,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:40:41,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-30 20:40:41,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-30 20:40:41,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-30 20:40:41,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-30 20:40:41,906 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-09-30 20:40:41,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:41,906 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-30 20:40:41,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 20:40:41,906 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-30 20:40:41,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-30 20:40:41,907 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:41,907 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-09-30 20:40:41,907 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:41,907 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:41,907 INFO L82 PathProgramCache]: Analyzing trace with hash -684368863, now seen corresponding path program 98 times [2018-09-30 20:40:41,907 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:41,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:41,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:41,908 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:41,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:41,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:42,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:42,439 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:42,439 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:42,447 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:40:42,498 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:40:42,498 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:42,501 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:42,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:42,703 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:42,703 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-30 20:40:42,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-30 20:40:42,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-30 20:40:42,705 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:42,705 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-09-30 20:40:43,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:43,463 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-30 20:40:43,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-30 20:40:43,463 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-09-30 20:40:43,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:43,464 INFO L225 Difference]: With dead ends: 105 [2018-09-30 20:40:43,464 INFO L226 Difference]: Without dead ends: 103 [2018-09-30 20:40:43,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:40:43,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-30 20:40:43,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-30 20:40:43,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-30 20:40:43,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-30 20:40:43,467 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-09-30 20:40:43,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:43,468 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-30 20:40:43,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-30 20:40:43,468 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-30 20:40:43,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-30 20:40:43,468 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:43,468 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-09-30 20:40:43,468 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:43,469 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:43,469 INFO L82 PathProgramCache]: Analyzing trace with hash 259399752, now seen corresponding path program 99 times [2018-09-30 20:40:43,469 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:43,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:43,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:43,469 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:43,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:43,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:44,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:44,033 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:44,033 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:44,040 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:40:44,127 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-09-30 20:40:44,127 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:44,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:44,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:44,335 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:44,336 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-30 20:40:44,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 20:40:44,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 20:40:44,337 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:44,337 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-09-30 20:40:45,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:45,107 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-09-30 20:40:45,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-30 20:40:45,107 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-09-30 20:40:45,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:45,108 INFO L225 Difference]: With dead ends: 106 [2018-09-30 20:40:45,109 INFO L226 Difference]: Without dead ends: 104 [2018-09-30 20:40:45,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:40:45,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-30 20:40:45,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-30 20:40:45,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-30 20:40:45,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-30 20:40:45,112 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-09-30 20:40:45,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:45,112 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-30 20:40:45,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 20:40:45,112 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-30 20:40:45,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-30 20:40:45,113 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:45,113 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-09-30 20:40:45,113 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:45,113 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:45,114 INFO L82 PathProgramCache]: Analyzing trace with hash -548544255, now seen corresponding path program 100 times [2018-09-30 20:40:45,114 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:45,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:45,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:45,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:45,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:45,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:45,802 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:45,802 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:45,809 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:40:45,862 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:40:45,863 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:45,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:46,110 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:46,111 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-30 20:40:46,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-30 20:40:46,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-30 20:40:46,112 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:46,112 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-09-30 20:40:46,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:46,899 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-30 20:40:46,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 20:40:46,899 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-09-30 20:40:46,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:46,900 INFO L225 Difference]: With dead ends: 107 [2018-09-30 20:40:46,900 INFO L226 Difference]: Without dead ends: 105 [2018-09-30 20:40:46,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:40:46,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-30 20:40:46,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-30 20:40:46,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-30 20:40:46,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-30 20:40:46,903 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-09-30 20:40:46,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:46,903 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-30 20:40:46,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-30 20:40:46,904 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-30 20:40:46,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 20:40:46,904 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:46,904 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-09-30 20:40:46,905 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:46,905 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:46,905 INFO L82 PathProgramCache]: Analyzing trace with hash 174995304, now seen corresponding path program 101 times [2018-09-30 20:40:46,905 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:46,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:46,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:46,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:46,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:46,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:47,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:47,516 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:47,516 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:47,523 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:40:47,625 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-09-30 20:40:47,625 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:47,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:47,832 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:47,832 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-30 20:40:47,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 20:40:47,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 20:40:47,834 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:47,834 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-09-30 20:40:48,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:48,661 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-09-30 20:40:48,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-30 20:40:48,661 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-09-30 20:40:48,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:48,662 INFO L225 Difference]: With dead ends: 108 [2018-09-30 20:40:48,663 INFO L226 Difference]: Without dead ends: 106 [2018-09-30 20:40:48,663 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:40:48,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-30 20:40:48,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-30 20:40:48,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-30 20:40:48,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-30 20:40:48,666 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-09-30 20:40:48,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:48,666 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-30 20:40:48,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 20:40:48,666 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-30 20:40:48,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-30 20:40:48,667 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:48,667 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-09-30 20:40:48,667 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:48,667 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:48,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1129885153, now seen corresponding path program 102 times [2018-09-30 20:40:48,667 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:48,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:48,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:48,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:48,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:48,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:49,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:49,303 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:49,303 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:49,310 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:40:49,400 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-09-30 20:40:49,400 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:49,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:49,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:49,638 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:49,638 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-30 20:40:49,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-30 20:40:49,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-30 20:40:49,640 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:49,640 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-09-30 20:40:50,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:50,424 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-30 20:40:50,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-30 20:40:50,425 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-09-30 20:40:50,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:50,426 INFO L225 Difference]: With dead ends: 109 [2018-09-30 20:40:50,426 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 20:40:50,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:40:50,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 20:40:50,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-30 20:40:50,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 20:40:50,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-30 20:40:50,428 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-09-30 20:40:50,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:50,429 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-30 20:40:50,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-30 20:40:50,429 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-30 20:40:50,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-30 20:40:50,429 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:50,430 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-09-30 20:40:50,430 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:50,430 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:50,430 INFO L82 PathProgramCache]: Analyzing trace with hash 666699400, now seen corresponding path program 103 times [2018-09-30 20:40:50,430 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:50,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:50,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:50,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:50,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:50,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:51,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:51,256 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:51,256 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:51,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:51,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:51,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:51,548 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:51,549 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-30 20:40:51,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 20:40:51,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 20:40:51,550 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:51,550 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-09-30 20:40:52,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:52,055 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-09-30 20:40:52,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-30 20:40:52,055 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-09-30 20:40:52,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:52,056 INFO L225 Difference]: With dead ends: 110 [2018-09-30 20:40:52,056 INFO L226 Difference]: Without dead ends: 108 [2018-09-30 20:40:52,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:40:52,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-30 20:40:52,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-30 20:40:52,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-30 20:40:52,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-30 20:40:52,058 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-09-30 20:40:52,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:52,058 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-30 20:40:52,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 20:40:52,058 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-30 20:40:52,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-30 20:40:52,059 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:52,059 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-09-30 20:40:52,059 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:52,059 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:52,059 INFO L82 PathProgramCache]: Analyzing trace with hash -807157055, now seen corresponding path program 104 times [2018-09-30 20:40:52,059 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:52,060 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:52,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:52,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:52,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:52,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:52,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:52,640 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:52,640 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:52,647 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:40:52,702 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:40:52,702 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:52,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:52,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:52,981 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:52,981 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-30 20:40:52,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-30 20:40:52,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-30 20:40:52,983 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:52,983 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-09-30 20:40:53,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:53,609 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-30 20:40:53,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-30 20:40:53,609 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-09-30 20:40:53,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:53,610 INFO L225 Difference]: With dead ends: 111 [2018-09-30 20:40:53,610 INFO L226 Difference]: Without dead ends: 109 [2018-09-30 20:40:53,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:40:53,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-30 20:40:53,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-30 20:40:53,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-30 20:40:53,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-30 20:40:53,612 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-09-30 20:40:53,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:53,612 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-30 20:40:53,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-30 20:40:53,612 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-30 20:40:53,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-30 20:40:53,613 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:53,613 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-09-30 20:40:53,613 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:53,613 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:53,613 INFO L82 PathProgramCache]: Analyzing trace with hash 747933096, now seen corresponding path program 105 times [2018-09-30 20:40:53,613 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:53,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:53,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:53,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:53,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:53,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:54,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:54,177 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:54,177 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:54,186 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:40:54,305 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-09-30 20:40:54,306 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:54,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:54,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:54,522 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:54,522 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-30 20:40:54,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 20:40:54,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 20:40:54,523 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:54,523 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states. [2018-09-30 20:40:55,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:55,396 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-09-30 20:40:55,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-30 20:40:55,397 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 108 [2018-09-30 20:40:55,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:55,397 INFO L225 Difference]: With dead ends: 112 [2018-09-30 20:40:55,397 INFO L226 Difference]: Without dead ends: 110 [2018-09-30 20:40:55,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:40:55,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-30 20:40:55,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-30 20:40:55,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-30 20:40:55,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-30 20:40:55,399 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-09-30 20:40:55,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:55,399 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-30 20:40:55,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 20:40:55,400 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-30 20:40:55,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-30 20:40:55,400 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:55,400 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-09-30 20:40:55,400 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:55,401 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:55,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1711087521, now seen corresponding path program 106 times [2018-09-30 20:40:55,401 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:55,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:55,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:55,402 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:55,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:55,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:56,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:56,184 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:56,184 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:56,191 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:40:56,246 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:40:56,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:56,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:56,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:56,459 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:56,459 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-30 20:40:56,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-30 20:40:56,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-30 20:40:56,460 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:56,460 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 109 states. [2018-09-30 20:40:57,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:57,271 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-30 20:40:57,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-30 20:40:57,272 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 109 [2018-09-30 20:40:57,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:57,272 INFO L225 Difference]: With dead ends: 113 [2018-09-30 20:40:57,272 INFO L226 Difference]: Without dead ends: 111 [2018-09-30 20:40:57,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:40:57,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-30 20:40:57,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-30 20:40:57,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-30 20:40:57,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-30 20:40:57,275 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-09-30 20:40:57,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:57,275 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-30 20:40:57,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-30 20:40:57,276 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-30 20:40:57,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 20:40:57,276 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:57,277 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-09-30 20:40:57,277 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:57,277 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:57,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1504103624, now seen corresponding path program 107 times [2018-09-30 20:40:57,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:57,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:57,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:57,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:57,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:57,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:57,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:57,876 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:57,876 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:57,883 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:40:57,993 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-30 20:40:57,993 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:57,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:58,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:58,209 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:58,209 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-30 20:40:58,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-30 20:40:58,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-30 20:40:58,210 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:58,210 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 110 states. [2018-09-30 20:40:59,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:59,109 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-09-30 20:40:59,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-30 20:40:59,109 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-09-30 20:40:59,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:59,110 INFO L225 Difference]: With dead ends: 114 [2018-09-30 20:40:59,110 INFO L226 Difference]: Without dead ends: 112 [2018-09-30 20:40:59,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:40:59,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-30 20:40:59,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-30 20:40:59,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-30 20:40:59,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-30 20:40:59,112 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-09-30 20:40:59,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:59,113 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-30 20:40:59,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-30 20:40:59,113 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-30 20:40:59,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-30 20:40:59,113 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:59,113 INFO L375 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-09-30 20:40:59,114 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:59,114 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:59,114 INFO L82 PathProgramCache]: Analyzing trace with hash -617429887, now seen corresponding path program 108 times [2018-09-30 20:40:59,114 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:59,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:59,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:59,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:59,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:59,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:59,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:59,707 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:59,707 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:59,715 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:40:59,811 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-30 20:40:59,812 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:59,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:00,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:00,035 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:00,036 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-09-30 20:41:00,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-30 20:41:00,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-30 20:41:00,037 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:00,037 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 111 states. [2018-09-30 20:41:00,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:00,643 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-30 20:41:00,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-30 20:41:00,644 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 111 [2018-09-30 20:41:00,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:00,645 INFO L225 Difference]: With dead ends: 115 [2018-09-30 20:41:00,645 INFO L226 Difference]: Without dead ends: 113 [2018-09-30 20:41:00,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:41:00,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-30 20:41:00,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-30 20:41:00,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-30 20:41:00,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-30 20:41:00,649 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-09-30 20:41:00,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:00,649 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-30 20:41:00,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-09-30 20:41:00,649 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-30 20:41:00,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-30 20:41:00,650 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:00,650 INFO L375 BasicCegarLoop]: trace histogram [109, 1, 1, 1] [2018-09-30 20:41:00,650 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:00,650 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:00,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1960459288, now seen corresponding path program 109 times [2018-09-30 20:41:00,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:00,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:00,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:00,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:00,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:00,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:01,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:01,518 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:01,518 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:01,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:41:01,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:01,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:01,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:01,808 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:01,809 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-09-30 20:41:01,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-30 20:41:01,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-30 20:41:01,810 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:01,810 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 112 states. [2018-09-30 20:41:02,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:02,693 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-09-30 20:41:02,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-09-30 20:41:02,694 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 112 [2018-09-30 20:41:02,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:02,694 INFO L225 Difference]: With dead ends: 116 [2018-09-30 20:41:02,694 INFO L226 Difference]: Without dead ends: 114 [2018-09-30 20:41:02,694 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:41:02,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-30 20:41:02,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-30 20:41:02,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-30 20:41:02,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-30 20:41:02,697 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2018-09-30 20:41:02,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:02,697 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-30 20:41:02,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-30 20:41:02,697 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-30 20:41:02,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-30 20:41:02,698 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:02,698 INFO L375 BasicCegarLoop]: trace histogram [110, 1, 1, 1] [2018-09-30 20:41:02,698 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:02,698 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:02,698 INFO L82 PathProgramCache]: Analyzing trace with hash -644697759, now seen corresponding path program 110 times [2018-09-30 20:41:02,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:02,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:02,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:02,699 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:41:02,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:02,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:03,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:03,341 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:03,341 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:03,348 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:41:03,403 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:41:03,403 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:03,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:03,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:03,623 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:03,624 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-09-30 20:41:03,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-30 20:41:03,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-30 20:41:03,625 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:03,626 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 113 states. [2018-09-30 20:41:04,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:04,573 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-30 20:41:04,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-30 20:41:04,573 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 113 [2018-09-30 20:41:04,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:04,574 INFO L225 Difference]: With dead ends: 117 [2018-09-30 20:41:04,574 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 20:41:04,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:41:04,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 20:41:04,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-30 20:41:04,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 20:41:04,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-30 20:41:04,577 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2018-09-30 20:41:04,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:04,577 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-30 20:41:04,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-30 20:41:04,578 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-30 20:41:04,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 20:41:04,578 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:04,578 INFO L375 BasicCegarLoop]: trace histogram [111, 1, 1, 1] [2018-09-30 20:41:04,578 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:04,579 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:04,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1489203976, now seen corresponding path program 111 times [2018-09-30 20:41:04,579 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:04,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:04,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:04,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:04,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:05,243 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 20:41:05,243 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:05,243 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 20:41:05,250 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:41:05,404 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2018-09-30 20:41:05,404 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:05,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:05,609 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 20:41:05,629 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:05,629 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 113 [2018-09-30 20:41:05,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-30 20:41:05,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-30 20:41:05,631 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:05,631 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 114 states. [2018-09-30 20:41:06,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:06,622 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-09-30 20:41:06,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-09-30 20:41:06,622 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 114 [2018-09-30 20:41:06,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:06,623 INFO L225 Difference]: With dead ends: 118 [2018-09-30 20:41:06,623 INFO L226 Difference]: Without dead ends: 116 [2018-09-30 20:41:06,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:41:06,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-30 20:41:06,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-30 20:41:06,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-30 20:41:06,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-09-30 20:41:06,626 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 114 [2018-09-30 20:41:06,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:06,626 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-09-30 20:41:06,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-30 20:41:06,626 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-09-30 20:41:06,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-30 20:41:06,627 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:06,627 INFO L375 BasicCegarLoop]: trace histogram [112, 1, 1, 1] [2018-09-30 20:41:06,627 INFO L423 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:06,627 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:06,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1079318975, now seen corresponding path program 112 times [2018-09-30 20:41:06,627 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:06,627 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:06,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:06,628 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:06,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:06,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:07,260 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 20:41:07,260 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:07,260 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:41:07,267 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:41:07,324 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:41:07,325 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:07,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:07,639 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 20:41:07,659 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:07,659 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114] total 114 [2018-09-30 20:41:07,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-09-30 20:41:07,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-09-30 20:41:07,661 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:07,661 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 115 states. [2018-09-30 20:41:08,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:08,447 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-30 20:41:08,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-09-30 20:41:08,448 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 115 [2018-09-30 20:41:08,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:08,448 INFO L225 Difference]: With dead ends: 119 [2018-09-30 20:41:08,448 INFO L226 Difference]: Without dead ends: 117 [2018-09-30 20:41:08,449 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:41:08,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-30 20:41:08,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-30 20:41:08,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-30 20:41:08,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-09-30 20:41:08,452 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 115 [2018-09-30 20:41:08,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:08,452 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-09-30 20:41:08,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-09-30 20:41:08,452 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-09-30 20:41:08,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 20:41:08,453 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:08,453 INFO L375 BasicCegarLoop]: trace histogram [113, 1, 1, 1] [2018-09-30 20:41:08,453 INFO L423 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:08,453 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:08,453 INFO L82 PathProgramCache]: Analyzing trace with hash 900848168, now seen corresponding path program 113 times [2018-09-30 20:41:08,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:08,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:08,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:08,454 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:08,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:08,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:09,256 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 20:41:09,256 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:09,257 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 20:41:09,263 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:41:09,382 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2018-09-30 20:41:09,383 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:09,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:09,717 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 20:41:09,737 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:09,737 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 115 [2018-09-30 20:41:09,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-30 20:41:09,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-30 20:41:09,738 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:09,738 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 116 states. [2018-09-30 20:41:10,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:10,397 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2018-09-30 20:41:10,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-09-30 20:41:10,397 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 116 [2018-09-30 20:41:10,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:10,398 INFO L225 Difference]: With dead ends: 120 [2018-09-30 20:41:10,398 INFO L226 Difference]: Without dead ends: 118 [2018-09-30 20:41:10,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:41:10,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-30 20:41:10,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-30 20:41:10,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-30 20:41:10,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-09-30 20:41:10,401 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 116 [2018-09-30 20:41:10,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:10,401 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-09-30 20:41:10,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-30 20:41:10,401 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-09-30 20:41:10,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-30 20:41:10,401 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:10,401 INFO L375 BasicCegarLoop]: trace histogram [114, 1, 1, 1] [2018-09-30 20:41:10,401 INFO L423 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:10,402 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:10,402 INFO L82 PathProgramCache]: Analyzing trace with hash -2138479839, now seen corresponding path program 114 times [2018-09-30 20:41:10,402 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:10,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:10,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:10,402 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:10,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:10,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:11,065 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 20:41:11,065 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:11,065 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 20:41:11,072 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:41:11,187 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 58 check-sat command(s) [2018-09-30 20:41:11,187 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:11,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:11,591 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 20:41:11,611 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:11,611 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 116 [2018-09-30 20:41:11,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-09-30 20:41:11,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-09-30 20:41:11,613 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:11,613 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 117 states. [2018-09-30 20:41:12,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:12,479 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-30 20:41:12,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-09-30 20:41:12,479 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 117 [2018-09-30 20:41:12,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:12,479 INFO L225 Difference]: With dead ends: 121 [2018-09-30 20:41:12,479 INFO L226 Difference]: Without dead ends: 119 [2018-09-30 20:41:12,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:41:12,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-30 20:41:12,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-30 20:41:12,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-30 20:41:12,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-30 20:41:12,482 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 117 [2018-09-30 20:41:12,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:12,482 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-30 20:41:12,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-09-30 20:41:12,482 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-30 20:41:12,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-30 20:41:12,483 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:12,483 INFO L375 BasicCegarLoop]: trace histogram [115, 1, 1, 1] [2018-09-30 20:41:12,483 INFO L423 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:12,483 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:12,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1868367544, now seen corresponding path program 115 times [2018-09-30 20:41:12,483 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:12,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:12,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:12,484 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:12,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:12,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:13,137 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 20:41:13,137 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:13,138 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:41:13,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:41:13,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:13,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:13,412 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 20:41:13,432 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:13,432 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117] total 117 [2018-09-30 20:41:13,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-30 20:41:13,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-30 20:41:13,434 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:13,434 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 118 states. [2018-09-30 20:41:14,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:14,286 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-09-30 20:41:14,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-09-30 20:41:14,286 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 118 [2018-09-30 20:41:14,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:14,287 INFO L225 Difference]: With dead ends: 122 [2018-09-30 20:41:14,287 INFO L226 Difference]: Without dead ends: 120 [2018-09-30 20:41:14,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:41:14,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-30 20:41:14,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-09-30 20:41:14,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-30 20:41:14,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-09-30 20:41:14,289 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 118 [2018-09-30 20:41:14,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:14,289 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-09-30 20:41:14,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-30 20:41:14,289 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-09-30 20:41:14,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-30 20:41:14,290 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:14,290 INFO L375 BasicCegarLoop]: trace histogram [116, 1, 1, 1] [2018-09-30 20:41:14,290 INFO L423 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:14,290 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:14,290 INFO L82 PathProgramCache]: Analyzing trace with hash -2084820991, now seen corresponding path program 116 times [2018-09-30 20:41:14,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:14,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:14,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:14,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:41:14,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:14,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:14,930 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 20:41:14,930 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:14,930 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 20:41:14,938 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:41:14,998 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:41:14,998 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:15,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:15,214 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 20:41:15,234 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:15,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118] total 118 [2018-09-30 20:41:15,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-09-30 20:41:15,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-09-30 20:41:15,235 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:15,236 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 119 states. [2018-09-30 20:41:15,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:15,871 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-30 20:41:15,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-09-30 20:41:15,871 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 119 [2018-09-30 20:41:15,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:15,872 INFO L225 Difference]: With dead ends: 123 [2018-09-30 20:41:15,872 INFO L226 Difference]: Without dead ends: 121 [2018-09-30 20:41:15,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:41:15,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-30 20:41:15,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-30 20:41:15,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-30 20:41:15,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-09-30 20:41:15,874 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 119 [2018-09-30 20:41:15,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:15,874 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-09-30 20:41:15,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-09-30 20:41:15,874 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-09-30 20:41:15,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-30 20:41:15,874 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:15,875 INFO L375 BasicCegarLoop]: trace histogram [117, 1, 1, 1] [2018-09-30 20:41:15,875 INFO L423 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:15,875 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:15,875 INFO L82 PathProgramCache]: Analyzing trace with hash -204943256, now seen corresponding path program 117 times [2018-09-30 20:41:15,875 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:15,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:15,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:15,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:15,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:15,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:16,770 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 20:41:16,771 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:16,771 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:41:16,777 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:41:16,887 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2018-09-30 20:41:16,887 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:16,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:17,102 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 20:41:17,123 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:17,124 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119] total 119 [2018-09-30 20:41:17,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-30 20:41:17,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-30 20:41:17,125 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:17,125 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 120 states. [2018-09-30 20:41:17,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:17,902 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2018-09-30 20:41:17,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-09-30 20:41:17,903 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 120 [2018-09-30 20:41:17,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:17,903 INFO L225 Difference]: With dead ends: 124 [2018-09-30 20:41:17,903 INFO L226 Difference]: Without dead ends: 122 [2018-09-30 20:41:17,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:41:17,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-30 20:41:17,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-09-30 20:41:17,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-30 20:41:17,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-09-30 20:41:17,906 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 120 [2018-09-30 20:41:17,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:17,906 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-09-30 20:41:17,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-30 20:41:17,906 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-09-30 20:41:17,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-30 20:41:17,907 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:17,907 INFO L375 BasicCegarLoop]: trace histogram [118, 1, 1, 1] [2018-09-30 20:41:17,907 INFO L423 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:17,907 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:17,907 INFO L82 PathProgramCache]: Analyzing trace with hash -2058275615, now seen corresponding path program 118 times [2018-09-30 20:41:17,908 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:17,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:17,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:17,908 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:17,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:18,563 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 20:41:18,563 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:18,564 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:41:18,570 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:41:18,629 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:41:18,630 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:18,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:18,850 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 20:41:18,869 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:18,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120] total 120 [2018-09-30 20:41:18,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-09-30 20:41:18,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-09-30 20:41:18,871 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:18,871 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 121 states. [2018-09-30 20:41:19,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:19,747 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-30 20:41:19,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-30 20:41:19,747 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 121 [2018-09-30 20:41:19,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:19,748 INFO L225 Difference]: With dead ends: 125 [2018-09-30 20:41:19,748 INFO L226 Difference]: Without dead ends: 123 [2018-09-30 20:41:19,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:41:19,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-30 20:41:19,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-30 20:41:19,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-30 20:41:19,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-30 20:41:19,751 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 121 [2018-09-30 20:41:19,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:19,751 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-30 20:41:19,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-09-30 20:41:19,751 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-30 20:41:19,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-30 20:41:19,752 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:19,752 INFO L375 BasicCegarLoop]: trace histogram [119, 1, 1, 1] [2018-09-30 20:41:19,752 INFO L423 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:19,752 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:19,752 INFO L82 PathProgramCache]: Analyzing trace with hash 617963400, now seen corresponding path program 119 times [2018-09-30 20:41:19,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:19,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:19,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:19,753 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:19,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:19,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:20,447 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 20:41:20,448 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:20,448 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:41:20,455 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:41:20,580 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-09-30 20:41:20,580 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:20,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:20,800 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 20:41:20,821 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:20,821 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121] total 121 [2018-09-30 20:41:20,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-30 20:41:20,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-30 20:41:20,823 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:20,823 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 122 states. [2018-09-30 20:41:21,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:21,427 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2018-09-30 20:41:21,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-09-30 20:41:21,428 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 122 [2018-09-30 20:41:21,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:21,428 INFO L225 Difference]: With dead ends: 126 [2018-09-30 20:41:21,429 INFO L226 Difference]: Without dead ends: 124 [2018-09-30 20:41:21,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:41:21,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-30 20:41:21,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-09-30 20:41:21,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-30 20:41:21,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-09-30 20:41:21,432 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 122 [2018-09-30 20:41:21,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:21,432 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-09-30 20:41:21,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-30 20:41:21,432 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-09-30 20:41:21,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-30 20:41:21,433 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:21,433 INFO L375 BasicCegarLoop]: trace histogram [120, 1, 1, 1] [2018-09-30 20:41:21,433 INFO L423 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:21,433 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:21,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1976994241, now seen corresponding path program 120 times [2018-09-30 20:41:21,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:21,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:21,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:21,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:21,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:21,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:22,349 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 20:41:22,349 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:22,349 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 20:41:22,356 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:41:22,469 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-30 20:41:22,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:22,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:22,703 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 20:41:22,723 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:22,723 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122] total 122 [2018-09-30 20:41:22,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-09-30 20:41:22,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-09-30 20:41:22,725 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:22,725 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 123 states. [2018-09-30 20:41:23,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:23,628 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-30 20:41:23,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-09-30 20:41:23,628 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 123 [2018-09-30 20:41:23,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:23,629 INFO L225 Difference]: With dead ends: 127 [2018-09-30 20:41:23,629 INFO L226 Difference]: Without dead ends: 125 [2018-09-30 20:41:23,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:41:23,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-30 20:41:23,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-30 20:41:23,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-30 20:41:23,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-09-30 20:41:23,631 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 123 [2018-09-30 20:41:23,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:23,631 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-09-30 20:41:23,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-09-30 20:41:23,631 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-09-30 20:41:23,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-30 20:41:23,632 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:23,632 INFO L375 BasicCegarLoop]: trace histogram [121, 1, 1, 1] [2018-09-30 20:41:23,632 INFO L423 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:23,632 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:23,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1157277352, now seen corresponding path program 121 times [2018-09-30 20:41:23,632 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:23,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:23,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:23,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:23,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:23,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:24,313 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 20:41:24,313 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:24,313 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 20:41:24,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:41:24,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:24,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:24,608 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 20:41:24,628 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:24,628 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123] total 123 [2018-09-30 20:41:24,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-30 20:41:24,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-30 20:41:24,630 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:24,630 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 124 states. [2018-09-30 20:41:25,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:25,545 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2018-09-30 20:41:25,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-09-30 20:41:25,545 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 124 [2018-09-30 20:41:25,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:25,546 INFO L225 Difference]: With dead ends: 128 [2018-09-30 20:41:25,546 INFO L226 Difference]: Without dead ends: 126 [2018-09-30 20:41:25,546 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:41:25,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-09-30 20:41:25,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-09-30 20:41:25,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-09-30 20:41:25,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-09-30 20:41:25,548 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 124 [2018-09-30 20:41:25,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:25,548 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-09-30 20:41:25,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-30 20:41:25,549 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-09-30 20:41:25,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-30 20:41:25,549 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:25,549 INFO L375 BasicCegarLoop]: trace histogram [122, 1, 1, 1] [2018-09-30 20:41:25,549 INFO L423 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:25,549 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:25,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1515857569, now seen corresponding path program 122 times [2018-09-30 20:41:25,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:25,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:25,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:25,550 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:41:25,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:25,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:26,254 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 20:41:26,254 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:26,254 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:41:26,262 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:41:26,324 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:41:26,324 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:26,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:26,571 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 20:41:26,591 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:26,591 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124] total 124 [2018-09-30 20:41:26,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-09-30 20:41:26,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-09-30 20:41:26,593 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:26,593 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 125 states. [2018-09-30 20:41:27,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:27,689 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-30 20:41:27,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-09-30 20:41:27,690 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 125 [2018-09-30 20:41:27,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:27,690 INFO L225 Difference]: With dead ends: 129 [2018-09-30 20:41:27,690 INFO L226 Difference]: Without dead ends: 127 [2018-09-30 20:41:27,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:41:27,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-30 20:41:27,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-30 20:41:27,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-30 20:41:27,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-09-30 20:41:27,693 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 125 [2018-09-30 20:41:27,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:27,693 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-09-30 20:41:27,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-09-30 20:41:27,694 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-09-30 20:41:27,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-30 20:41:27,694 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:27,694 INFO L375 BasicCegarLoop]: trace histogram [123, 1, 1, 1] [2018-09-30 20:41:27,695 INFO L423 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:27,695 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:27,695 INFO L82 PathProgramCache]: Analyzing trace with hash -253057592, now seen corresponding path program 123 times [2018-09-30 20:41:27,695 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:27,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:27,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:27,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:27,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:27,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:28,395 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 20:41:28,395 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:28,395 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 20:41:28,401 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:41:28,528 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2018-09-30 20:41:28,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:28,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:28,751 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 20:41:28,771 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:28,771 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125] total 125 [2018-09-30 20:41:28,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-30 20:41:28,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-30 20:41:28,773 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:28,773 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 126 states. [2018-09-30 20:41:29,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:29,680 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2018-09-30 20:41:29,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-09-30 20:41:29,680 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 126 [2018-09-30 20:41:29,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:29,681 INFO L225 Difference]: With dead ends: 130 [2018-09-30 20:41:29,681 INFO L226 Difference]: Without dead ends: 128 [2018-09-30 20:41:29,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:41:29,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-30 20:41:29,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-09-30 20:41:29,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-09-30 20:41:29,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-09-30 20:41:29,683 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 126 [2018-09-30 20:41:29,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:29,683 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-09-30 20:41:29,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-30 20:41:29,684 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-09-30 20:41:29,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-30 20:41:29,684 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:29,684 INFO L375 BasicCegarLoop]: trace histogram [124, 1, 1, 1] [2018-09-30 20:41:29,684 INFO L423 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:29,684 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:29,684 INFO L82 PathProgramCache]: Analyzing trace with hash 745147265, now seen corresponding path program 124 times [2018-09-30 20:41:29,684 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:29,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:29,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:29,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:29,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:29,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:30,374 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 20:41:30,375 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:30,375 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 20:41:30,382 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:41:30,447 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:41:30,448 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:30,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:30,690 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 20:41:30,711 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:30,711 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 126] total 126 [2018-09-30 20:41:30,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-09-30 20:41:30,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-09-30 20:41:30,713 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:30,713 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 127 states. [2018-09-30 20:41:31,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:31,725 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-30 20:41:31,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-09-30 20:41:31,725 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 127 [2018-09-30 20:41:31,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:31,725 INFO L225 Difference]: With dead ends: 131 [2018-09-30 20:41:31,726 INFO L226 Difference]: Without dead ends: 129 [2018-09-30 20:41:31,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:41:31,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-30 20:41:31,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-30 20:41:31,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-30 20:41:31,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-09-30 20:41:31,728 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 127 [2018-09-30 20:41:31,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:31,728 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-09-30 20:41:31,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-09-30 20:41:31,728 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-09-30 20:41:31,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-30 20:41:31,729 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:31,729 INFO L375 BasicCegarLoop]: trace histogram [125, 1, 1, 1] [2018-09-30 20:41:31,729 INFO L423 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:31,729 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:31,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1624726760, now seen corresponding path program 125 times [2018-09-30 20:41:31,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:31,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:31,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:31,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:31,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:31,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:32,611 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 20:41:32,612 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:32,612 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:41:32,622 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:41:32,760 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2018-09-30 20:41:32,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:32,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:33,041 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 20:41:33,062 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:33,062 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 127] total 127 [2018-09-30 20:41:33,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-30 20:41:33,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-30 20:41:33,064 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:33,064 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 128 states. [2018-09-30 20:41:33,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:33,926 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2018-09-30 20:41:33,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-09-30 20:41:33,926 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 128 [2018-09-30 20:41:33,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:33,927 INFO L225 Difference]: With dead ends: 132 [2018-09-30 20:41:33,927 INFO L226 Difference]: Without dead ends: 130 [2018-09-30 20:41:33,927 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:41:33,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-30 20:41:33,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-09-30 20:41:33,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-30 20:41:33,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-09-30 20:41:33,929 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 128 [2018-09-30 20:41:33,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:33,929 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-09-30 20:41:33,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-30 20:41:33,930 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-09-30 20:41:33,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-09-30 20:41:33,930 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:33,930 INFO L375 BasicCegarLoop]: trace histogram [126, 1, 1, 1] [2018-09-30 20:41:33,930 INFO L423 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:33,930 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:33,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1173079967, now seen corresponding path program 126 times [2018-09-30 20:41:33,931 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:33,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:33,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:33,931 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:33,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:33,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:34,636 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 20:41:34,637 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:34,637 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:41:34,643 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:41:34,765 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 64 check-sat command(s) [2018-09-30 20:41:34,765 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:34,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:34,997 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 20:41:35,018 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:35,019 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128] total 128 [2018-09-30 20:41:35,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-09-30 20:41:35,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-09-30 20:41:35,021 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:35,021 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 129 states. [2018-09-30 20:41:35,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:35,907 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-30 20:41:35,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-09-30 20:41:35,907 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 129 [2018-09-30 20:41:35,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:35,908 INFO L225 Difference]: With dead ends: 133 [2018-09-30 20:41:35,908 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 20:41:35,908 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:41:35,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 20:41:35,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-30 20:41:35,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-30 20:41:35,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-09-30 20:41:35,911 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 129 [2018-09-30 20:41:35,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:35,911 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-09-30 20:41:35,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-09-30 20:41:35,911 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-09-30 20:41:35,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-30 20:41:35,912 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:35,912 INFO L375 BasicCegarLoop]: trace histogram [127, 1, 1, 1] [2018-09-30 20:41:35,913 INFO L423 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:35,913 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:35,913 INFO L82 PathProgramCache]: Analyzing trace with hash -2005742584, now seen corresponding path program 127 times [2018-09-30 20:41:35,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:35,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:35,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:35,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:35,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:35,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:36,650 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 20:41:36,650 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:36,651 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 20:41:36,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:41:36,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:36,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:37,143 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 20:41:37,163 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:37,164 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129] total 129 [2018-09-30 20:41:37,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-30 20:41:37,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-30 20:41:37,166 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:37,166 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 130 states. [2018-09-30 20:41:38,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:38,237 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-09-30 20:41:38,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-09-30 20:41:38,238 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 130 [2018-09-30 20:41:38,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:38,238 INFO L225 Difference]: With dead ends: 134 [2018-09-30 20:41:38,239 INFO L226 Difference]: Without dead ends: 132 [2018-09-30 20:41:38,239 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:41:38,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-09-30 20:41:38,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-09-30 20:41:38,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-09-30 20:41:38,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-09-30 20:41:38,242 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 130 [2018-09-30 20:41:38,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:38,242 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-09-30 20:41:38,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-30 20:41:38,242 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-09-30 20:41:38,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-30 20:41:38,243 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:38,243 INFO L375 BasicCegarLoop]: trace histogram [128, 1, 1, 1] [2018-09-30 20:41:38,243 INFO L423 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:38,243 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:38,244 INFO L82 PathProgramCache]: Analyzing trace with hash -2048479935, now seen corresponding path program 128 times [2018-09-30 20:41:38,244 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:38,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:38,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:38,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:41:38,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:38,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:39,016 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 20:41:39,016 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:39,016 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 20:41:39,026 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:41:39,094 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:41:39,095 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:39,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:39,329 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 20:41:39,350 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:39,351 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 130] total 130 [2018-09-30 20:41:39,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-09-30 20:41:39,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-09-30 20:41:39,353 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:39,353 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 131 states. [2018-09-30 20:41:40,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:40,503 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-30 20:41:40,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-09-30 20:41:40,503 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 131 [2018-09-30 20:41:40,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:40,503 INFO L225 Difference]: With dead ends: 135 [2018-09-30 20:41:40,504 INFO L226 Difference]: Without dead ends: 133 [2018-09-30 20:41:40,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:41:40,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-30 20:41:40,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-30 20:41:40,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-30 20:41:40,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-09-30 20:41:40,507 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 131 [2018-09-30 20:41:40,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:40,507 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-09-30 20:41:40,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-09-30 20:41:40,508 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-09-30 20:41:40,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-30 20:41:40,508 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:40,508 INFO L375 BasicCegarLoop]: trace histogram [129, 1, 1, 1] [2018-09-30 20:41:40,509 INFO L423 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:40,509 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:40,509 INFO L82 PathProgramCache]: Analyzing trace with hash 921629480, now seen corresponding path program 129 times [2018-09-30 20:41:40,509 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:40,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:40,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:40,510 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:40,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:41,391 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 20:41:41,392 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:41,392 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:41:41,399 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:41:41,564 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2018-09-30 20:41:41,564 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:41,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:41,792 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 20:41:41,813 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:41,813 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131] total 131 [2018-09-30 20:41:41,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-30 20:41:41,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-30 20:41:41,814 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:41,814 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 132 states. [2018-09-30 20:41:43,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:43,038 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2018-09-30 20:41:43,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-09-30 20:41:43,039 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 132 [2018-09-30 20:41:43,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:43,039 INFO L225 Difference]: With dead ends: 136 [2018-09-30 20:41:43,039 INFO L226 Difference]: Without dead ends: 134 [2018-09-30 20:41:43,039 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:41:43,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-30 20:41:43,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-09-30 20:41:43,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-09-30 20:41:43,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-09-30 20:41:43,042 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 132 [2018-09-30 20:41:43,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:43,042 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-09-30 20:41:43,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-30 20:41:43,042 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-09-30 20:41:43,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-30 20:41:43,044 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:43,044 INFO L375 BasicCegarLoop]: trace histogram [130, 1, 1, 1] [2018-09-30 20:41:43,044 INFO L423 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:43,044 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:43,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1494259167, now seen corresponding path program 130 times [2018-09-30 20:41:43,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:43,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:43,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:43,045 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:43,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:43,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:43,815 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 20:41:43,815 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:43,815 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 20:41:43,822 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:41:43,889 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:41:43,889 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:43,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:44,158 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 20:41:44,178 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:44,179 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 132] total 132 [2018-09-30 20:41:44,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 133 states [2018-09-30 20:41:44,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2018-09-30 20:41:44,180 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:44,180 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 133 states. [2018-09-30 20:41:45,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:45,187 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-30 20:41:45,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-09-30 20:41:45,188 INFO L78 Accepts]: Start accepts. Automaton has 133 states. Word has length 133 [2018-09-30 20:41:45,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:45,188 INFO L225 Difference]: With dead ends: 137 [2018-09-30 20:41:45,188 INFO L226 Difference]: Without dead ends: 135 [2018-09-30 20:41:45,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:41:45,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-30 20:41:45,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-30 20:41:45,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-30 20:41:45,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-09-30 20:41:45,191 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 133 [2018-09-30 20:41:45,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:45,191 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-09-30 20:41:45,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 133 states. [2018-09-30 20:41:45,191 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-09-30 20:41:45,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-30 20:41:45,192 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:45,192 INFO L375 BasicCegarLoop]: trace histogram [131, 1, 1, 1] [2018-09-30 20:41:45,192 INFO L423 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:45,192 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:45,193 INFO L82 PathProgramCache]: Analyzing trace with hash 922604104, now seen corresponding path program 131 times [2018-09-30 20:41:45,193 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:45,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:45,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:45,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:45,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:45,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:45,945 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 20:41:45,945 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:45,945 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:41:45,955 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:41:46,103 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-09-30 20:41:46,104 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:46,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:46,348 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 20:41:46,370 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:46,370 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133] total 133 [2018-09-30 20:41:46,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-30 20:41:46,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-30 20:41:46,372 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:46,372 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 134 states. [2018-09-30 20:41:47,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:47,251 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2018-09-30 20:41:47,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-09-30 20:41:47,251 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 134 [2018-09-30 20:41:47,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:47,252 INFO L225 Difference]: With dead ends: 138 [2018-09-30 20:41:47,252 INFO L226 Difference]: Without dead ends: 136 [2018-09-30 20:41:47,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:41:47,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-30 20:41:47,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-30 20:41:47,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-30 20:41:47,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-09-30 20:41:47,254 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 134 [2018-09-30 20:41:47,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:47,254 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-09-30 20:41:47,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-30 20:41:47,254 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-09-30 20:41:47,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-30 20:41:47,254 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:47,254 INFO L375 BasicCegarLoop]: trace histogram [132, 1, 1, 1] [2018-09-30 20:41:47,255 INFO L423 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:47,255 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:47,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1464045823, now seen corresponding path program 132 times [2018-09-30 20:41:47,255 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:47,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:47,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:47,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:47,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:47,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:48,086 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 20:41:48,086 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:48,086 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:41:48,093 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:41:48,219 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-30 20:41:48,220 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:48,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:48,492 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 20:41:48,512 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:48,512 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 134] total 134 [2018-09-30 20:41:48,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 135 states [2018-09-30 20:41:48,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2018-09-30 20:41:48,514 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:48,514 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 135 states. [2018-09-30 20:41:49,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:49,216 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-30 20:41:49,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-09-30 20:41:49,217 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 135 [2018-09-30 20:41:49,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:49,217 INFO L225 Difference]: With dead ends: 139 [2018-09-30 20:41:49,217 INFO L226 Difference]: Without dead ends: 137 [2018-09-30 20:41:49,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:41:49,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-30 20:41:49,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-30 20:41:49,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-30 20:41:49,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-09-30 20:41:49,219 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 135 [2018-09-30 20:41:49,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:49,220 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-09-30 20:41:49,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 135 states. [2018-09-30 20:41:49,220 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-09-30 20:41:49,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-30 20:41:49,220 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:49,220 INFO L375 BasicCegarLoop]: trace histogram [133, 1, 1, 1] [2018-09-30 20:41:49,220 INFO L423 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:49,220 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:49,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1859217768, now seen corresponding path program 133 times [2018-09-30 20:41:49,221 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:49,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:49,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:49,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:49,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:50,009 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 20:41:50,009 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:50,009 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 20:41:50,017 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:41:50,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:50,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:50,348 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 20:41:50,368 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:50,368 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 135] total 135 [2018-09-30 20:41:50,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-30 20:41:50,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-30 20:41:50,370 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:50,370 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 136 states. [2018-09-30 20:41:51,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:51,655 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2018-09-30 20:41:51,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-09-30 20:41:51,655 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 136 [2018-09-30 20:41:51,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:51,655 INFO L225 Difference]: With dead ends: 140 [2018-09-30 20:41:51,655 INFO L226 Difference]: Without dead ends: 138 [2018-09-30 20:41:51,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:41:51,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-30 20:41:51,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-09-30 20:41:51,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-09-30 20:41:51,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-09-30 20:41:51,658 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 136 [2018-09-30 20:41:51,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:51,658 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-09-30 20:41:51,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-30 20:41:51,658 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-09-30 20:41:51,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-30 20:41:51,658 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:51,658 INFO L375 BasicCegarLoop]: trace histogram [134, 1, 1, 1] [2018-09-30 20:41:51,659 INFO L423 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:51,659 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:51,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1801173985, now seen corresponding path program 134 times [2018-09-30 20:41:51,659 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:51,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:51,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:51,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:41:51,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:51,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:52,641 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 20:41:52,641 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:52,641 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 20:41:52,649 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:41:52,720 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:41:52,720 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:52,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:52,972 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 20:41:52,991 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:52,992 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [136, 136] total 136 [2018-09-30 20:41:52,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-09-30 20:41:52,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-09-30 20:41:52,993 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:52,994 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 137 states. [2018-09-30 20:41:54,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:54,124 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-30 20:41:54,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-09-30 20:41:54,125 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 137 [2018-09-30 20:41:54,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:54,125 INFO L225 Difference]: With dead ends: 141 [2018-09-30 20:41:54,125 INFO L226 Difference]: Without dead ends: 139 [2018-09-30 20:41:54,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:41:54,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-30 20:41:54,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-30 20:41:54,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-30 20:41:54,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-09-30 20:41:54,128 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 137 [2018-09-30 20:41:54,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:54,129 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-09-30 20:41:54,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-09-30 20:41:54,129 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-09-30 20:41:54,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-30 20:41:54,129 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:54,129 INFO L375 BasicCegarLoop]: trace histogram [135, 1, 1, 1] [2018-09-30 20:41:54,130 INFO L423 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:54,130 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:54,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1816712, now seen corresponding path program 135 times [2018-09-30 20:41:54,130 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:54,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:54,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:54,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:54,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:54,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:54,951 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 20:41:54,951 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:54,951 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:41:54,959 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:41:55,099 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2018-09-30 20:41:55,099 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:55,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:55,352 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 20:41:55,374 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:55,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 137] total 137 [2018-09-30 20:41:55,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-30 20:41:55,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-30 20:41:55,376 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:55,376 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 138 states. [2018-09-30 20:41:56,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:56,071 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-09-30 20:41:56,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-09-30 20:41:56,071 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 138 [2018-09-30 20:41:56,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:56,071 INFO L225 Difference]: With dead ends: 142 [2018-09-30 20:41:56,072 INFO L226 Difference]: Without dead ends: 140 [2018-09-30 20:41:56,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:41:56,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-30 20:41:56,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-09-30 20:41:56,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-30 20:41:56,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-09-30 20:41:56,074 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 138 [2018-09-30 20:41:56,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:56,074 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-09-30 20:41:56,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-30 20:41:56,074 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-09-30 20:41:56,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-09-30 20:41:56,076 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:56,076 INFO L375 BasicCegarLoop]: trace histogram [136, 1, 1, 1] [2018-09-30 20:41:56,076 INFO L423 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:56,076 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:56,076 INFO L82 PathProgramCache]: Analyzing trace with hash 56316097, now seen corresponding path program 136 times [2018-09-30 20:41:56,076 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:56,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:56,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:56,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:56,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:56,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:57,000 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 20:41:57,000 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:57,000 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 20:41:57,007 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:41:57,078 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:41:57,078 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:57,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:57,388 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 20:41:57,408 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:57,408 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [138, 138] total 138 [2018-09-30 20:41:57,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 139 states [2018-09-30 20:41:57,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2018-09-30 20:41:57,410 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:57,410 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 139 states. [2018-09-30 20:41:58,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:58,776 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-30 20:41:58,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2018-09-30 20:41:58,777 INFO L78 Accepts]: Start accepts. Automaton has 139 states. Word has length 139 [2018-09-30 20:41:58,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:58,777 INFO L225 Difference]: With dead ends: 143 [2018-09-30 20:41:58,777 INFO L226 Difference]: Without dead ends: 141 [2018-09-30 20:41:58,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:41:58,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-30 20:41:58,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-30 20:41:58,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-30 20:41:58,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-09-30 20:41:58,780 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 139 [2018-09-30 20:41:58,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:58,780 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-09-30 20:41:58,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 139 states. [2018-09-30 20:41:58,780 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-09-30 20:41:58,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-30 20:41:58,780 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:58,780 INFO L375 BasicCegarLoop]: trace histogram [137, 1, 1, 1] [2018-09-30 20:41:58,781 INFO L423 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:58,781 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:58,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1745797032, now seen corresponding path program 137 times [2018-09-30 20:41:58,781 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:58,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:58,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:58,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:58,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:59,622 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 20:41:59,623 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:59,623 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 20:41:59,630 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:41:59,788 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 70 check-sat command(s) [2018-09-30 20:41:59,789 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:59,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:00,039 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 20:42:00,059 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:00,059 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139] total 139 [2018-09-30 20:42:00,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-09-30 20:42:00,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-09-30 20:42:00,061 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:00,061 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 140 states. [2018-09-30 20:42:01,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:01,022 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2018-09-30 20:42:01,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2018-09-30 20:42:01,022 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 140 [2018-09-30 20:42:01,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:01,023 INFO L225 Difference]: With dead ends: 144 [2018-09-30 20:42:01,023 INFO L226 Difference]: Without dead ends: 142 [2018-09-30 20:42:01,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:42:01,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-09-30 20:42:01,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-09-30 20:42:01,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-09-30 20:42:01,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-09-30 20:42:01,025 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 140 [2018-09-30 20:42:01,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:01,025 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-09-30 20:42:01,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-09-30 20:42:01,025 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-09-30 20:42:01,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-09-30 20:42:01,026 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:01,026 INFO L375 BasicCegarLoop]: trace histogram [138, 1, 1, 1] [2018-09-30 20:42:01,026 INFO L423 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:01,026 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:01,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1714868831, now seen corresponding path program 138 times [2018-09-30 20:42:01,026 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:01,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:01,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:01,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:01,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:01,835 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 20:42:01,836 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:01,836 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 20:42:01,842 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:42:02,001 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 70 check-sat command(s) [2018-09-30 20:42:02,001 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:02,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:02,251 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 20:42:02,271 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:02,271 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 140] total 140 [2018-09-30 20:42:02,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 141 states [2018-09-30 20:42:02,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2018-09-30 20:42:02,273 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:02,273 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 141 states. [2018-09-30 20:42:03,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:03,727 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-30 20:42:03,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2018-09-30 20:42:03,728 INFO L78 Accepts]: Start accepts. Automaton has 141 states. Word has length 141 [2018-09-30 20:42:03,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:03,728 INFO L225 Difference]: With dead ends: 145 [2018-09-30 20:42:03,728 INFO L226 Difference]: Without dead ends: 143 [2018-09-30 20:42:03,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:42:03,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-30 20:42:03,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-30 20:42:03,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-30 20:42:03,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-09-30 20:42:03,731 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 141 [2018-09-30 20:42:03,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:03,732 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-09-30 20:42:03,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 141 states. [2018-09-30 20:42:03,732 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-09-30 20:42:03,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-30 20:42:03,732 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:03,733 INFO L375 BasicCegarLoop]: trace histogram [139, 1, 1, 1] [2018-09-30 20:42:03,733 INFO L423 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:03,733 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:03,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1621328184, now seen corresponding path program 139 times [2018-09-30 20:42:03,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:03,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:03,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:03,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:03,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:03,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:04,549 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 20:42:04,549 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:04,549 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 20:42:04,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:42:04,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:04,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:04,895 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 20:42:04,915 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:04,915 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [141, 141] total 141 [2018-09-30 20:42:04,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-30 20:42:04,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-30 20:42:04,917 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:04,917 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 142 states. [2018-09-30 20:42:05,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:05,964 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2018-09-30 20:42:05,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2018-09-30 20:42:05,964 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 142 [2018-09-30 20:42:05,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:05,965 INFO L225 Difference]: With dead ends: 146 [2018-09-30 20:42:05,965 INFO L226 Difference]: Without dead ends: 144 [2018-09-30 20:42:05,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:42:05,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-09-30 20:42:05,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-09-30 20:42:05,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-09-30 20:42:05,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-09-30 20:42:05,967 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 142 [2018-09-30 20:42:05,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:05,967 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-09-30 20:42:05,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-30 20:42:05,967 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-09-30 20:42:05,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-30 20:42:05,968 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:05,968 INFO L375 BasicCegarLoop]: trace histogram [140, 1, 1, 1] [2018-09-30 20:42:05,968 INFO L423 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:05,968 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:05,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1278431873, now seen corresponding path program 140 times [2018-09-30 20:42:05,968 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:05,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:05,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:05,969 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:42:05,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:05,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:06,802 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 20:42:06,803 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:06,803 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 20:42:06,809 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:42:06,884 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:42:06,884 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:06,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:07,182 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 20:42:07,201 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:07,202 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [142, 142] total 142 [2018-09-30 20:42:07,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 143 states [2018-09-30 20:42:07,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2018-09-30 20:42:07,203 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:07,204 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 143 states. [2018-09-30 20:42:08,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:08,613 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-30 20:42:08,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2018-09-30 20:42:08,614 INFO L78 Accepts]: Start accepts. Automaton has 143 states. Word has length 143 [2018-09-30 20:42:08,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:08,614 INFO L225 Difference]: With dead ends: 147 [2018-09-30 20:42:08,614 INFO L226 Difference]: Without dead ends: 145 [2018-09-30 20:42:08,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:42:08,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-30 20:42:08,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-30 20:42:08,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-30 20:42:08,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-09-30 20:42:08,617 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 143 [2018-09-30 20:42:08,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:08,617 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-09-30 20:42:08,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 143 states. [2018-09-30 20:42:08,617 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-09-30 20:42:08,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-30 20:42:08,618 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:08,618 INFO L375 BasicCegarLoop]: trace histogram [141, 1, 1, 1] [2018-09-30 20:42:08,618 INFO L423 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:08,618 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:08,618 INFO L82 PathProgramCache]: Analyzing trace with hash 976680424, now seen corresponding path program 141 times [2018-09-30 20:42:08,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:08,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:08,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:08,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:08,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:08,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:09,442 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 20:42:09,442 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:09,443 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 20:42:09,449 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:42:09,594 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 72 check-sat command(s) [2018-09-30 20:42:09,594 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:09,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:09,879 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 20:42:09,899 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:09,899 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [143, 143] total 143 [2018-09-30 20:42:09,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-30 20:42:09,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-30 20:42:09,901 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:09,901 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 144 states. [2018-09-30 20:42:10,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:10,668 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2018-09-30 20:42:10,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-09-30 20:42:10,669 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 144 [2018-09-30 20:42:10,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:10,669 INFO L225 Difference]: With dead ends: 148 [2018-09-30 20:42:10,669 INFO L226 Difference]: Without dead ends: 146 [2018-09-30 20:42:10,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:42:10,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-30 20:42:10,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-09-30 20:42:10,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-09-30 20:42:10,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-09-30 20:42:10,672 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 144 [2018-09-30 20:42:10,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:10,672 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-09-30 20:42:10,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-30 20:42:10,673 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-09-30 20:42:10,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-09-30 20:42:10,673 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:10,673 INFO L375 BasicCegarLoop]: trace histogram [142, 1, 1, 1] [2018-09-30 20:42:10,673 INFO L423 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:10,673 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:10,673 INFO L82 PathProgramCache]: Analyzing trace with hash 212320097, now seen corresponding path program 142 times [2018-09-30 20:42:10,674 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:10,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:10,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:10,674 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:10,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:10,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:11,515 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 20:42:11,515 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:11,515 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:42:11,522 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:42:11,607 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:42:11,608 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:11,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:11,930 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 20:42:11,950 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:11,950 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [144, 144] total 144 [2018-09-30 20:42:11,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 145 states [2018-09-30 20:42:11,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2018-09-30 20:42:11,952 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:11,952 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 145 states. [2018-09-30 20:42:13,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:13,161 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-30 20:42:13,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2018-09-30 20:42:13,162 INFO L78 Accepts]: Start accepts. Automaton has 145 states. Word has length 145 [2018-09-30 20:42:13,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:13,162 INFO L225 Difference]: With dead ends: 149 [2018-09-30 20:42:13,162 INFO L226 Difference]: Without dead ends: 147 [2018-09-30 20:42:13,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:42:13,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-30 20:42:13,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-30 20:42:13,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-30 20:42:13,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-09-30 20:42:13,165 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 145 [2018-09-30 20:42:13,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:13,165 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-09-30 20:42:13,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 145 states. [2018-09-30 20:42:13,165 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-09-30 20:42:13,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-30 20:42:13,166 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:13,166 INFO L375 BasicCegarLoop]: trace histogram [143, 1, 1, 1] [2018-09-30 20:42:13,166 INFO L423 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:13,166 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:13,166 INFO L82 PathProgramCache]: Analyzing trace with hash -2008013560, now seen corresponding path program 143 times [2018-09-30 20:42:13,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:13,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:13,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:13,167 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:13,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:13,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:14,017 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 20:42:14,018 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:14,018 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 20:42:14,024 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:42:14,196 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2018-09-30 20:42:14,196 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:14,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:14,463 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 20:42:14,483 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:14,483 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [145, 145] total 145 [2018-09-30 20:42:14,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-09-30 20:42:14,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-09-30 20:42:14,485 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:14,485 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 146 states. [2018-09-30 20:42:15,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:15,886 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2018-09-30 20:42:15,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2018-09-30 20:42:15,886 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 146 [2018-09-30 20:42:15,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:15,886 INFO L225 Difference]: With dead ends: 150 [2018-09-30 20:42:15,886 INFO L226 Difference]: Without dead ends: 148 [2018-09-30 20:42:15,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:42:15,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-30 20:42:15,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-09-30 20:42:15,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-30 20:42:15,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-09-30 20:42:15,889 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 146 [2018-09-30 20:42:15,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:15,889 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-09-30 20:42:15,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-09-30 20:42:15,890 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-09-30 20:42:15,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-09-30 20:42:15,890 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:15,890 INFO L375 BasicCegarLoop]: trace histogram [144, 1, 1, 1] [2018-09-30 20:42:15,890 INFO L423 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:15,890 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:15,891 INFO L82 PathProgramCache]: Analyzing trace with hash -2118880191, now seen corresponding path program 144 times [2018-09-30 20:42:15,891 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:15,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:15,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:15,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:15,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:15,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:16,744 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 20:42:16,744 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:16,745 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 20:42:16,752 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:42:16,902 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-30 20:42:16,902 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:16,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:17,170 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 20:42:17,190 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:17,190 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [146, 146] total 146 [2018-09-30 20:42:17,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 147 states [2018-09-30 20:42:17,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2018-09-30 20:42:17,192 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:17,192 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 147 states. [2018-09-30 20:42:18,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:18,222 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-30 20:42:18,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2018-09-30 20:42:18,222 INFO L78 Accepts]: Start accepts. Automaton has 147 states. Word has length 147 [2018-09-30 20:42:18,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:18,223 INFO L225 Difference]: With dead ends: 151 [2018-09-30 20:42:18,223 INFO L226 Difference]: Without dead ends: 149 [2018-09-30 20:42:18,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:42:18,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-30 20:42:18,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-30 20:42:18,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-30 20:42:18,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-09-30 20:42:18,225 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 147 [2018-09-30 20:42:18,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:18,226 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-09-30 20:42:18,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 147 states. [2018-09-30 20:42:18,226 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-09-30 20:42:18,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-30 20:42:18,226 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:18,226 INFO L375 BasicCegarLoop]: trace histogram [145, 1, 1, 1] [2018-09-30 20:42:18,226 INFO L423 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:18,227 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:18,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1260778456, now seen corresponding path program 145 times [2018-09-30 20:42:18,227 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:18,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:18,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:18,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:18,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:18,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:19,151 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 20:42:19,151 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:19,151 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:42:19,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:42:19,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:19,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:19,509 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 20:42:19,530 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:19,530 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [147, 147] total 147 [2018-09-30 20:42:19,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-09-30 20:42:19,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-09-30 20:42:19,532 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:19,532 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 148 states. [2018-09-30 20:42:21,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:21,094 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2018-09-30 20:42:21,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2018-09-30 20:42:21,094 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 148 [2018-09-30 20:42:21,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:21,095 INFO L225 Difference]: With dead ends: 152 [2018-09-30 20:42:21,095 INFO L226 Difference]: Without dead ends: 150 [2018-09-30 20:42:21,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:42:21,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-09-30 20:42:21,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-09-30 20:42:21,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-09-30 20:42:21,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-09-30 20:42:21,097 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 148 [2018-09-30 20:42:21,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:21,097 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-09-30 20:42:21,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-09-30 20:42:21,098 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-09-30 20:42:21,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-09-30 20:42:21,098 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:21,098 INFO L375 BasicCegarLoop]: trace histogram [146, 1, 1, 1] [2018-09-30 20:42:21,098 INFO L423 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:21,098 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:21,098 INFO L82 PathProgramCache]: Analyzing trace with hash -429428447, now seen corresponding path program 146 times [2018-09-30 20:42:21,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:21,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:21,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:21,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:42:21,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:21,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:21,997 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 20:42:21,997 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:21,997 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 20:42:22,005 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:42:22,084 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:42:22,085 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:22,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:22,360 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 20:42:22,380 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:22,381 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [148, 148] total 148 [2018-09-30 20:42:22,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 149 states [2018-09-30 20:42:22,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2018-09-30 20:42:22,382 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:22,382 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 149 states. [2018-09-30 20:42:23,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:23,833 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-30 20:42:23,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-09-30 20:42:23,833 INFO L78 Accepts]: Start accepts. Automaton has 149 states. Word has length 149 [2018-09-30 20:42:23,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:23,834 INFO L225 Difference]: With dead ends: 153 [2018-09-30 20:42:23,834 INFO L226 Difference]: Without dead ends: 151 [2018-09-30 20:42:23,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:42:23,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-30 20:42:23,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-30 20:42:23,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-30 20:42:23,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-09-30 20:42:23,836 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 149 [2018-09-30 20:42:23,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:23,836 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-09-30 20:42:23,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 149 states. [2018-09-30 20:42:23,836 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-09-30 20:42:23,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-30 20:42:23,837 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:23,837 INFO L375 BasicCegarLoop]: trace histogram [147, 1, 1, 1] [2018-09-30 20:42:23,837 INFO L423 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:23,837 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:23,837 INFO L82 PathProgramCache]: Analyzing trace with hash -427381944, now seen corresponding path program 147 times [2018-09-30 20:42:23,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:23,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:23,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:23,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:23,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:23,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:24,710 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 20:42:24,710 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:24,710 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 20:42:24,716 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:42:24,883 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 75 check-sat command(s) [2018-09-30 20:42:24,883 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:24,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:25,179 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 20:42:25,200 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:25,200 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [149, 149] total 149 [2018-09-30 20:42:25,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-09-30 20:42:25,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-09-30 20:42:25,201 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:25,202 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 150 states. [2018-09-30 20:42:26,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:26,808 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2018-09-30 20:42:26,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2018-09-30 20:42:26,808 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 150 [2018-09-30 20:42:26,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:26,809 INFO L225 Difference]: With dead ends: 154 [2018-09-30 20:42:26,809 INFO L226 Difference]: Without dead ends: 152 [2018-09-30 20:42:26,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:42:26,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-09-30 20:42:26,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-09-30 20:42:26,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-09-30 20:42:26,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-09-30 20:42:26,812 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 150 [2018-09-30 20:42:26,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:26,813 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-09-30 20:42:26,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-09-30 20:42:26,813 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-09-30 20:42:26,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-09-30 20:42:26,814 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:26,814 INFO L375 BasicCegarLoop]: trace histogram [148, 1, 1, 1] [2018-09-30 20:42:26,814 INFO L423 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:26,814 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:26,814 INFO L82 PathProgramCache]: Analyzing trace with hash -363940351, now seen corresponding path program 148 times [2018-09-30 20:42:26,815 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:26,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:26,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:26,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:26,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:26,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:27,734 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 20:42:27,735 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:27,735 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 20:42:27,742 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:42:27,819 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:42:27,820 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:27,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:28,215 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 20:42:28,235 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:28,235 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [150, 150] total 150 [2018-09-30 20:42:28,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 151 states [2018-09-30 20:42:28,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2018-09-30 20:42:28,237 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:28,238 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 151 states. [2018-09-30 20:42:29,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:29,602 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-30 20:42:29,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2018-09-30 20:42:29,603 INFO L78 Accepts]: Start accepts. Automaton has 151 states. Word has length 151 [2018-09-30 20:42:29,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:29,604 INFO L225 Difference]: With dead ends: 155 [2018-09-30 20:42:29,604 INFO L226 Difference]: Without dead ends: 153 [2018-09-30 20:42:29,604 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:42:29,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-30 20:42:29,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-30 20:42:29,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-30 20:42:29,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-09-30 20:42:29,606 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 151 [2018-09-30 20:42:29,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:29,606 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-09-30 20:42:29,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 151 states. [2018-09-30 20:42:29,606 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-09-30 20:42:29,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-30 20:42:29,607 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:29,607 INFO L375 BasicCegarLoop]: trace histogram [149, 1, 1, 1] [2018-09-30 20:42:29,607 INFO L423 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:29,607 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:29,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1602749032, now seen corresponding path program 149 times [2018-09-30 20:42:29,607 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:29,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:29,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:29,608 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:29,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:30,511 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 20:42:30,511 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:30,511 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 20:42:30,518 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:42:30,704 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 76 check-sat command(s) [2018-09-30 20:42:30,704 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:30,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:30,982 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 20:42:31,002 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:31,003 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [151, 151] total 151 [2018-09-30 20:42:31,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-09-30 20:42:31,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-09-30 20:42:31,005 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:31,005 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 152 states. [2018-09-30 20:42:31,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:31,995 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2018-09-30 20:42:31,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2018-09-30 20:42:31,996 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 152 [2018-09-30 20:42:31,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:31,996 INFO L225 Difference]: With dead ends: 156 [2018-09-30 20:42:31,996 INFO L226 Difference]: Without dead ends: 154 [2018-09-30 20:42:31,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:42:31,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-30 20:42:31,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-09-30 20:42:31,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-09-30 20:42:31,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-09-30 20:42:31,999 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 152 [2018-09-30 20:42:31,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:32,000 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-09-30 20:42:32,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-09-30 20:42:32,000 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-09-30 20:42:32,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-09-30 20:42:32,001 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:32,001 INFO L375 BasicCegarLoop]: trace histogram [150, 1, 1, 1] [2018-09-30 20:42:32,001 INFO L423 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:32,002 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:32,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1854389535, now seen corresponding path program 150 times [2018-09-30 20:42:32,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:32,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:32,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:32,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:32,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:32,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:32,966 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 20:42:32,966 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:32,966 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:42:32,974 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:42:33,136 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 76 check-sat command(s) [2018-09-30 20:42:33,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:33,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:33,534 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 20:42:33,554 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:33,555 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [152, 152] total 152 [2018-09-30 20:42:33,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 153 states [2018-09-30 20:42:33,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2018-09-30 20:42:33,557 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:33,557 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 153 states. [2018-09-30 20:42:34,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:34,528 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-30 20:42:34,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2018-09-30 20:42:34,528 INFO L78 Accepts]: Start accepts. Automaton has 153 states. Word has length 153 [2018-09-30 20:42:34,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:34,529 INFO L225 Difference]: With dead ends: 157 [2018-09-30 20:42:34,529 INFO L226 Difference]: Without dead ends: 155 [2018-09-30 20:42:34,529 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-09-30 20:42:34,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-30 20:42:34,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-30 20:42:34,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-30 20:42:34,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-09-30 20:42:34,531 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 153 [2018-09-30 20:42:34,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:34,531 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-09-30 20:42:34,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 153 states. [2018-09-30 20:42:34,531 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-09-30 20:42:34,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-30 20:42:34,532 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:34,532 INFO L375 BasicCegarLoop]: trace histogram [151, 1, 1, 1] [2018-09-30 20:42:34,532 INFO L423 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:34,532 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:34,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1651502712, now seen corresponding path program 151 times [2018-09-30 20:42:34,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:34,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:34,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:34,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:34,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:34,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:35,439 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 20:42:35,439 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:35,439 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 20:42:35,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:42:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:35,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:35,823 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 20:42:35,843 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:35,843 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [153, 153] total 153 [2018-09-30 20:42:35,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-09-30 20:42:35,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-09-30 20:42:35,845 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:35,845 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 154 states. [2018-09-30 20:42:36,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:36,796 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2018-09-30 20:42:36,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2018-09-30 20:42:36,796 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 154 [2018-09-30 20:42:36,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:36,797 INFO L225 Difference]: With dead ends: 158 [2018-09-30 20:42:36,797 INFO L226 Difference]: Without dead ends: 156 [2018-09-30 20:42:36,797 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:42:36,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-09-30 20:42:36,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-09-30 20:42:36,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-09-30 20:42:36,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-09-30 20:42:36,799 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 154 [2018-09-30 20:42:36,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:36,799 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-09-30 20:42:36,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-09-30 20:42:36,799 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-09-30 20:42:36,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-09-30 20:42:36,800 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:36,800 INFO L375 BasicCegarLoop]: trace histogram [152, 1, 1, 1] [2018-09-30 20:42:36,800 INFO L423 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:36,800 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:36,800 INFO L82 PathProgramCache]: Analyzing trace with hash 343021505, now seen corresponding path program 152 times [2018-09-30 20:42:36,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:36,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:36,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:36,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:42:36,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:37,750 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 20:42:37,750 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:37,750 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 20:42:37,757 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:42:37,835 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:42:37,836 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:37,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:38,125 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 20:42:38,145 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:38,145 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [154, 154] total 154 [2018-09-30 20:42:38,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 155 states [2018-09-30 20:42:38,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2018-09-30 20:42:38,147 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:38,147 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 155 states. [2018-09-30 20:42:39,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:39,287 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-30 20:42:39,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2018-09-30 20:42:39,287 INFO L78 Accepts]: Start accepts. Automaton has 155 states. Word has length 155 [2018-09-30 20:42:39,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:39,288 INFO L225 Difference]: With dead ends: 159 [2018-09-30 20:42:39,288 INFO L226 Difference]: Without dead ends: 157 [2018-09-30 20:42:39,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:42:39,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-30 20:42:39,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-30 20:42:39,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-30 20:42:39,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-09-30 20:42:39,291 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 155 [2018-09-30 20:42:39,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:39,292 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-09-30 20:42:39,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 155 states. [2018-09-30 20:42:39,292 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-09-30 20:42:39,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-30 20:42:39,292 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:39,292 INFO L375 BasicCegarLoop]: trace histogram [153, 1, 1, 1] [2018-09-30 20:42:39,293 INFO L423 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:39,293 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:39,293 INFO L82 PathProgramCache]: Analyzing trace with hash 2043730088, now seen corresponding path program 153 times [2018-09-30 20:42:39,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:39,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:39,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:39,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:39,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:39,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:40,251 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 20:42:40,252 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:40,252 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:42:40,259 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:42:40,424 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 78 check-sat command(s) [2018-09-30 20:42:40,425 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:40,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:40,706 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 20:42:40,727 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:40,727 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [155, 155] total 155 [2018-09-30 20:42:40,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-09-30 20:42:40,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-09-30 20:42:40,729 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:40,729 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 156 states. [2018-09-30 20:42:41,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:41,847 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2018-09-30 20:42:41,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2018-09-30 20:42:41,847 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 156 [2018-09-30 20:42:41,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:41,847 INFO L225 Difference]: With dead ends: 160 [2018-09-30 20:42:41,847 INFO L226 Difference]: Without dead ends: 158 [2018-09-30 20:42:41,848 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:42:41,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-09-30 20:42:41,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-09-30 20:42:41,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-09-30 20:42:41,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-09-30 20:42:41,850 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 156 [2018-09-30 20:42:41,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:41,850 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-09-30 20:42:41,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-09-30 20:42:41,850 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-09-30 20:42:41,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-09-30 20:42:41,851 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:41,851 INFO L375 BasicCegarLoop]: trace histogram [154, 1, 1, 1] [2018-09-30 20:42:41,851 INFO L423 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:41,851 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:41,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1068878687, now seen corresponding path program 154 times [2018-09-30 20:42:41,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:41,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:41,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:41,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:41,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:41,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:42,799 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 20:42:42,799 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:42,799 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 20:42:42,806 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:42:42,884 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:42:42,884 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:42,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:43,173 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 20:42:43,193 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:43,194 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [156, 156] total 156 [2018-09-30 20:42:43,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 157 states [2018-09-30 20:42:43,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2018-09-30 20:42:43,196 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:43,196 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 157 states. [2018-09-30 20:42:44,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:44,841 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-30 20:42:44,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2018-09-30 20:42:44,841 INFO L78 Accepts]: Start accepts. Automaton has 157 states. Word has length 157 [2018-09-30 20:42:44,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:44,842 INFO L225 Difference]: With dead ends: 161 [2018-09-30 20:42:44,842 INFO L226 Difference]: Without dead ends: 159 [2018-09-30 20:42:44,842 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:42:44,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-30 20:42:44,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-09-30 20:42:44,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-30 20:42:44,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-09-30 20:42:44,844 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 157 [2018-09-30 20:42:44,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:44,844 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-09-30 20:42:44,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 157 states. [2018-09-30 20:42:44,844 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-09-30 20:42:44,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-30 20:42:44,845 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:44,845 INFO L375 BasicCegarLoop]: trace histogram [155, 1, 1, 1] [2018-09-30 20:42:44,845 INFO L423 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:44,845 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:44,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1224497096, now seen corresponding path program 155 times [2018-09-30 20:42:44,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:44,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:44,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:44,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:44,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:44,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:45,839 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 20:42:45,840 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:45,840 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 20:42:45,848 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:42:46,049 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 79 check-sat command(s) [2018-09-30 20:42:46,049 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:46,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:46,353 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 20:42:46,374 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:46,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [157, 157] total 157 [2018-09-30 20:42:46,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-09-30 20:42:46,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-09-30 20:42:46,377 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:46,377 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 158 states. [2018-09-30 20:42:48,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:48,296 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2018-09-30 20:42:48,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2018-09-30 20:42:48,297 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 158 [2018-09-30 20:42:48,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:48,297 INFO L225 Difference]: With dead ends: 162 [2018-09-30 20:42:48,297 INFO L226 Difference]: Without dead ends: 160 [2018-09-30 20:42:48,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:42:48,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-09-30 20:42:48,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-09-30 20:42:48,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-30 20:42:48,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-09-30 20:42:48,300 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 158 [2018-09-30 20:42:48,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:48,300 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-09-30 20:42:48,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-09-30 20:42:48,300 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-09-30 20:42:48,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-09-30 20:42:48,300 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:48,300 INFO L375 BasicCegarLoop]: trace histogram [156, 1, 1, 1] [2018-09-30 20:42:48,301 INFO L423 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:48,301 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:48,301 INFO L82 PathProgramCache]: Analyzing trace with hash -695297663, now seen corresponding path program 156 times [2018-09-30 20:42:48,301 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:48,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:48,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:48,301 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:48,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:48,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:49,495 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 20:42:49,495 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:49,495 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 20:42:49,503 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:42:49,676 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-30 20:42:49,676 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:49,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:49,969 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 20:42:49,991 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:49,991 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [158, 158] total 158 [2018-09-30 20:42:49,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 159 states [2018-09-30 20:42:49,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2018-09-30 20:42:49,994 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:49,994 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 159 states. [2018-09-30 20:42:51,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:51,836 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-09-30 20:42:51,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2018-09-30 20:42:51,837 INFO L78 Accepts]: Start accepts. Automaton has 159 states. Word has length 159 [2018-09-30 20:42:51,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:51,837 INFO L225 Difference]: With dead ends: 163 [2018-09-30 20:42:51,837 INFO L226 Difference]: Without dead ends: 161 [2018-09-30 20:42:51,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time [2018-09-30 20:42:51,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-30 20:42:51,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-30 20:42:51,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-30 20:42:51,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-09-30 20:42:51,840 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 159 [2018-09-30 20:42:51,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:51,840 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-09-30 20:42:51,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 159 states. [2018-09-30 20:42:51,840 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-09-30 20:42:51,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-30 20:42:51,840 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:51,841 INFO L375 BasicCegarLoop]: trace histogram [157, 1, 1, 1] [2018-09-30 20:42:51,841 INFO L423 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:51,841 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:51,841 INFO L82 PathProgramCache]: Analyzing trace with hash -79393048, now seen corresponding path program 157 times [2018-09-30 20:42:51,841 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:51,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:51,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:51,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:51,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:51,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:52,824 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 20:42:52,825 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:52,825 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 20:42:52,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:42:52,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:52,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:53,212 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 20:42:53,234 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:53,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [159, 159] total 159 [2018-09-30 20:42:53,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-09-30 20:42:53,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-09-30 20:42:53,237 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:53,237 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 160 states. [2018-09-30 20:42:54,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:54,644 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2018-09-30 20:42:54,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2018-09-30 20:42:54,644 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 160 [2018-09-30 20:42:54,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:54,645 INFO L225 Difference]: With dead ends: 164 [2018-09-30 20:42:54,645 INFO L226 Difference]: Without dead ends: 162 [2018-09-30 20:42:54,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:42:54,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-09-30 20:42:54,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-09-30 20:42:54,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-09-30 20:42:54,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-09-30 20:42:54,647 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 160 [2018-09-30 20:42:54,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:54,647 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-09-30 20:42:54,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-09-30 20:42:54,647 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-09-30 20:42:54,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-09-30 20:42:54,648 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:54,648 INFO L375 BasicCegarLoop]: trace histogram [158, 1, 1, 1] [2018-09-30 20:42:54,648 INFO L423 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:54,648 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:54,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1833780833, now seen corresponding path program 158 times [2018-09-30 20:42:54,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:54,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:54,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:54,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:42:54,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:54,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:55,644 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 20:42:55,645 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:55,645 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:42:55,652 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:42:55,728 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:42:55,728 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:55,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:56,028 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 20:42:56,048 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:56,049 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [160, 160] total 160 [2018-09-30 20:42:56,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 161 states [2018-09-30 20:42:56,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2018-09-30 20:42:56,051 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:56,052 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 161 states. [2018-09-30 20:42:57,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:57,037 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-30 20:42:57,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2018-09-30 20:42:57,038 INFO L78 Accepts]: Start accepts. Automaton has 161 states. Word has length 161 [2018-09-30 20:42:57,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:57,038 INFO L225 Difference]: With dead ends: 165 [2018-09-30 20:42:57,038 INFO L226 Difference]: Without dead ends: 163 [2018-09-30 20:42:57,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:42:57,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-30 20:42:57,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-30 20:42:57,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-30 20:42:57,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-09-30 20:42:57,041 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 161 [2018-09-30 20:42:57,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:57,041 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-09-30 20:42:57,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 161 states. [2018-09-30 20:42:57,041 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-09-30 20:42:57,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-30 20:42:57,041 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:57,041 INFO L375 BasicCegarLoop]: trace histogram [159, 1, 1, 1] [2018-09-30 20:42:57,042 INFO L423 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:57,042 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:57,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1012629000, now seen corresponding path program 159 times [2018-09-30 20:42:57,042 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:57,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:57,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:57,042 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:57,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:57,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:58,039 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 20:42:58,039 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:58,039 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 20:42:58,046 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:42:58,276 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 81 check-sat command(s) [2018-09-30 20:42:58,276 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:58,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:58,595 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 20:42:58,615 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:58,615 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [161, 161] total 161 [2018-09-30 20:42:58,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-09-30 20:42:58,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-09-30 20:42:58,617 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:58,617 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 162 states. [2018-09-30 20:43:00,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:00,663 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2018-09-30 20:43:00,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2018-09-30 20:43:00,663 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 162 [2018-09-30 20:43:00,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:00,664 INFO L225 Difference]: With dead ends: 166 [2018-09-30 20:43:00,664 INFO L226 Difference]: Without dead ends: 164 [2018-09-30 20:43:00,664 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:43:00,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-30 20:43:00,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-09-30 20:43:00,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-09-30 20:43:00,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-09-30 20:43:00,667 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 162 [2018-09-30 20:43:00,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:00,667 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-09-30 20:43:00,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-09-30 20:43:00,667 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-09-30 20:43:00,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-09-30 20:43:00,668 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:00,668 INFO L375 BasicCegarLoop]: trace histogram [160, 1, 1, 1] [2018-09-30 20:43:00,668 INFO L423 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:00,668 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:00,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1326725953, now seen corresponding path program 160 times [2018-09-30 20:43:00,668 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:00,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:00,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:00,669 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:00,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:00,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:01,720 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 20:43:01,720 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:01,721 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:43:01,727 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:43:01,809 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:43:01,809 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:01,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-09-30 20:43:01,910 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-30 20:43:02,111 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:02,111 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 20:43:02,117 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 20:43:02,118 INFO L202 PluginConnector]: Adding new model overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 08:43:02 BoogieIcfgContainer [2018-09-30 20:43:02,118 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 20:43:02,119 INFO L168 Benchmark]: Toolchain (without parser) took 241742.34 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -26.7 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 165.3 MB). Peak memory consumption was 138.5 MB. Max. memory is 7.1 GB. [2018-09-30 20:43:02,121 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:43:02,121 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.41 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:43:02,121 INFO L168 Benchmark]: Boogie Preprocessor took 20.91 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:43:02,122 INFO L168 Benchmark]: RCFGBuilder took 284.40 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 20:43:02,122 INFO L168 Benchmark]: TraceAbstraction took 241384.06 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -26.7 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 144.1 MB). Peak memory consumption was 117.4 MB. Max. memory is 7.1 GB. [2018-09-30 20:43:02,125 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 46.41 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 20.91 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 284.40 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 241384.06 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -26.7 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 144.1 MB). Peak memory consumption was 117.4 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 164 with TraceHistMax 160, 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, 241.3s OverallTime, 161 OverallIterations, 160 TraceHistogramMax, 99.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 480 SDtfs, 0 SDslu, 7087 SDs, 0 SdLazy, 20127 SolverSat, 286 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 21.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26078 GetRequests, 13198 SyntacticMatches, 0 SemanticMatches, 12880 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 112.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=164occurred in iteration=160, 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, 160 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.8s SsaConstructionTime, 11.3s SatisfiabilityAnalysisTime, 120.5s InterpolantComputationTime, 26397 NumberOfCodeBlocks, 26397 NumberOfCodeBlocksAsserted, 3585 NumberOfCheckSat, 26078 ConstructedInterpolants, 0 QuantifiedInterpolants, 8372312 SizeOfPredicates, 159 NumberOfNonLiveVariables, 53742 ConjunctsInSsa, 13038 ConjunctsInUnsatCore, 319 InterpolantComputations, 1 PerfectInterpolantSequences, 0/1365280 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_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_20-43-02-142.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_20-43-02-142.csv Completed graceful shutdown