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/20170304-DifficultPathPrograms/gauss_sum.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-10-01 00:48:47,570 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-01 00:48:47,572 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-01 00:48:47,589 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-10-01 00:48:47,621 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 [2018-10-01 00:48:47,645 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-01 00:48:47,646 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-01 00:48:47,646 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-01 00:48:47,647 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-01 00:48:47,647 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-01 00:48:47,647 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-01 00:48:47,648 INFO L133 SettingsManager]: * Use SBE=true [2018-10-01 00:48:47,648 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-01 00:48:47,648 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-01 00:48:47,648 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-01 00:48:47,649 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-01 00:48:47,650 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-01 00:48:47,650 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-01 00:48:47,650 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-01 00:48:47,650 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-01 00:48:47,650 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-01 00:48:47,651 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-01 00:48:47,651 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-01 00:48:47,651 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-01 00:48:47,651 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-01 00:48:47,651 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-01 00:48:47,652 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-01 00:48:47,652 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-01 00:48:47,652 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-01 00:48:47,652 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-01 00:48:47,654 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-01 00:48:47,654 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-01 00:48:47,654 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-01 00:48:47,654 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-01 00:48:47,655 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-01 00:48:47,655 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-01 00:48:47,710 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-01 00:48:47,724 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-01 00:48:47,730 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-01 00:48:47,732 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-01 00:48:47,733 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-01 00:48:47,734 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/gauss_sum.i_3.bpl [2018-10-01 00:48:47,734 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/gauss_sum.i_3.bpl' [2018-10-01 00:48:47,781 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-01 00:48:47,784 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-01 00:48:47,785 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-01 00:48:47,785 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-01 00:48:47,785 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-01 00:48:47,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:48:47" (1/1) ... [2018-10-01 00:48:47,815 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:48:47" (1/1) ... [2018-10-01 00:48:47,822 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-01 00:48:47,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-01 00:48:47,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-01 00:48:47,823 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-01 00:48:47,834 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:48:47" (1/1) ... [2018-10-01 00:48:47,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:48:47" (1/1) ... [2018-10-01 00:48:47,835 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:48:47" (1/1) ... [2018-10-01 00:48:47,836 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:48:47" (1/1) ... [2018-10-01 00:48:47,838 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:48:47" (1/1) ... [2018-10-01 00:48:47,840 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:48:47" (1/1) ... [2018-10-01 00:48:47,841 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:48:47" (1/1) ... [2018-10-01 00:48:47,842 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-01 00:48:47,843 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-01 00:48:47,843 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-01 00:48:47,843 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-01 00:48:47,844 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:48:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-01 00:48:47,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-01 00:48:47,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-01 00:48:48,067 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-01 00:48:48,067 INFO L202 PluginConnector]: Adding new model gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 12:48:48 BoogieIcfgContainer [2018-10-01 00:48:48,068 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-01 00:48:48,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-01 00:48:48,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-01 00:48:48,072 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-01 00:48:48,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:48:47" (1/2) ... [2018-10-01 00:48:48,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e3ff87e and model type gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 12:48:48, skipping insertion in model container [2018-10-01 00:48:48,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 12:48:48" (2/2) ... [2018-10-01 00:48:48,076 INFO L112 eAbstractionObserver]: Analyzing ICFG gauss_sum.i_3.bpl [2018-10-01 00:48:48,086 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-01 00:48:48,094 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-01 00:48:48,148 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-01 00:48:48,149 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-01 00:48:48,150 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-01 00:48:48,150 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-01 00:48:48,150 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-01 00:48:48,150 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-01 00:48:48,150 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-01 00:48:48,151 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-01 00:48:48,151 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-01 00:48:48,167 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-01 00:48:48,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-01 00:48:48,174 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:48:48,175 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-01 00:48:48,177 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:48:48,184 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:48:48,185 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-10-01 00:48:48,187 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:48:48,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:48:48,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:48,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:48:48,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:48,281 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:48:48,281 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:48:48,281 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:48:48,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:48:48,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:48:48,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:48:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:48:48,485 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-01 00:48:48,485 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-01 00:48:48,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-01 00:48:48,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-01 00:48:48,507 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:48:48,509 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-01 00:48:48,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:48:48,669 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-01 00:48:48,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-01 00:48:48,671 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-01 00:48:48,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:48:48,683 INFO L225 Difference]: With dead ends: 11 [2018-10-01 00:48:48,683 INFO L226 Difference]: Without dead ends: 7 [2018-10-01 00:48:48,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 00:48:48,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-01 00:48:48,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-01 00:48:48,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-01 00:48:48,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-01 00:48:48,724 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-10-01 00:48:48,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:48:48,724 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-01 00:48:48,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-01 00:48:48,725 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-01 00:48:48,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-01 00:48:48,725 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:48:48,726 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-10-01 00:48:48,726 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:48:48,726 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:48:48,726 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-10-01 00:48:48,727 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:48:48,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:48:48,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:48,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:48:48,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:48,735 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:48:48,736 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:48:48,736 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:48:48,744 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:48:48,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:48:48,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:48:48,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:48:48,850 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:48:48,850 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-10-01 00:48:48,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-01 00:48:48,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-01 00:48:48,852 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:48:48,852 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-10-01 00:48:49,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:48:49,007 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-01 00:48:49,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-01 00:48:49,008 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-01 00:48:49,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:48:49,009 INFO L225 Difference]: With dead ends: 11 [2018-10-01 00:48:49,009 INFO L226 Difference]: Without dead ends: 9 [2018-10-01 00:48:49,010 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 00:48:49,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-01 00:48:49,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-01 00:48:49,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-01 00:48:49,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-01 00:48:49,014 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-01 00:48:49,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:48:49,015 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-01 00:48:49,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-01 00:48:49,015 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-01 00:48:49,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-01 00:48:49,016 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:48:49,016 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-10-01 00:48:49,016 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:48:49,017 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:48:49,017 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-10-01 00:48:49,017 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:48:49,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:48:49,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:49,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:48:49,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:49,026 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:48:49,027 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:48:49,027 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:48:49,043 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:48:49,055 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:48:49,056 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:48:49,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:48:49,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:48:49,269 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:48:49,269 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-10-01 00:48:49,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-01 00:48:49,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-01 00:48:49,270 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:48:49,270 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-10-01 00:48:49,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:48:49,558 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-01 00:48:49,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-01 00:48:49,560 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-01 00:48:49,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:48:49,560 INFO L225 Difference]: With dead ends: 13 [2018-10-01 00:48:49,561 INFO L226 Difference]: Without dead ends: 11 [2018-10-01 00:48:49,561 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 00:48:49,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-01 00:48:49,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-01 00:48:49,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-01 00:48:49,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-01 00:48:49,566 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-10-01 00:48:49,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:48:49,566 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-01 00:48:49,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-01 00:48:49,567 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-01 00:48:49,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-01 00:48:49,567 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:48:49,568 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-10-01 00:48:49,569 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:48:49,569 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:48:49,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-10-01 00:48:49,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:48:49,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:48:49,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:49,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:48:49,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:49,579 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:48:49,579 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:48:49,579 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:48:49,589 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:48:49,602 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-01 00:48:49,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:48:49,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:48:49,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:48:49,766 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:48:49,766 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-10-01 00:48:49,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-01 00:48:49,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-01 00:48:49,768 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:48:49,768 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-10-01 00:48:50,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:48:50,055 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-01 00:48:50,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-01 00:48:50,056 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-01 00:48:50,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:48:50,057 INFO L225 Difference]: With dead ends: 15 [2018-10-01 00:48:50,057 INFO L226 Difference]: Without dead ends: 13 [2018-10-01 00:48:50,057 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 00:48:50,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-01 00:48:50,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-01 00:48:50,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-01 00:48:50,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-01 00:48:50,062 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-10-01 00:48:50,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:48:50,062 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-01 00:48:50,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-01 00:48:50,063 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-01 00:48:50,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-01 00:48:50,063 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:48:50,064 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-10-01 00:48:50,064 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:48:50,064 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:48:50,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-10-01 00:48:50,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:48:50,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:48:50,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:50,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:48:50,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:50,075 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:48:50,075 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:48:50,075 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:48:50,089 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:48:50,132 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:48:50,132 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:48:50,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:48:50,375 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:48:50,413 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:48:50,413 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-10-01 00:48:50,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-01 00:48:50,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-01 00:48:50,414 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:48:50,415 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-10-01 00:48:50,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:48:50,876 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-01 00:48:50,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-01 00:48:50,877 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-01 00:48:50,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:48:50,878 INFO L225 Difference]: With dead ends: 17 [2018-10-01 00:48:50,879 INFO L226 Difference]: Without dead ends: 15 [2018-10-01 00:48:50,879 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 00:48:50,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-01 00:48:50,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-01 00:48:50,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-01 00:48:50,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-01 00:48:50,884 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-10-01 00:48:50,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:48:50,884 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-01 00:48:50,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-01 00:48:50,885 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-01 00:48:50,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-01 00:48:50,885 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:48:50,885 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-10-01 00:48:50,886 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:48:50,886 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:48:50,886 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-10-01 00:48:50,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:48:50,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:48:50,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:50,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:48:50,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:50,898 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:48:50,899 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:48:50,899 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:48:50,914 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:48:50,926 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-01 00:48:50,927 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:48:50,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:48:51,057 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:48:51,078 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:48:51,078 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-10-01 00:48:51,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 00:48:51,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 00:48:51,079 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:48:51,079 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-10-01 00:48:51,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:48:51,358 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-01 00:48:51,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 00:48:51,359 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-01 00:48:51,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:48:51,360 INFO L225 Difference]: With dead ends: 19 [2018-10-01 00:48:51,360 INFO L226 Difference]: Without dead ends: 17 [2018-10-01 00:48:51,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 00:48:51,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-01 00:48:51,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-01 00:48:51,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-01 00:48:51,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-01 00:48:51,366 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-10-01 00:48:51,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:48:51,366 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-01 00:48:51,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 00:48:51,366 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-01 00:48:51,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-01 00:48:51,367 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:48:51,367 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-10-01 00:48:51,368 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:48:51,368 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:48:51,368 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-10-01 00:48:51,368 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:48:51,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:48:51,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:51,369 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:48:51,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:51,379 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:48:51,379 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:48:51,379 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:48:51,392 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:48:51,411 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-01 00:48:51,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:48:51,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:48:51,587 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:48:51,608 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:48:51,608 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-10-01 00:48:51,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 00:48:51,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 00:48:51,609 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:48:51,609 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-10-01 00:48:51,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:48:51,963 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-01 00:48:51,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 00:48:51,966 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-01 00:48:51,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:48:51,967 INFO L225 Difference]: With dead ends: 21 [2018-10-01 00:48:51,967 INFO L226 Difference]: Without dead ends: 19 [2018-10-01 00:48:51,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 00:48:51,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-01 00:48:51,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-01 00:48:51,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-01 00:48:51,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-01 00:48:51,972 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-10-01 00:48:51,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:48:51,973 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-01 00:48:51,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 00:48:51,973 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-01 00:48:51,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-01 00:48:51,974 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:48:51,974 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-10-01 00:48:51,974 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:48:51,974 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:48:51,974 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-10-01 00:48:51,974 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:48:51,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:48:51,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:51,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:48:51,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:51,986 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:48:51,986 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:48:51,986 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:48:51,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:48:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:48:52,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:48:52,162 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:48:52,190 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:48:52,190 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-10-01 00:48:52,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 00:48:52,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 00:48:52,191 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:48:52,191 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-10-01 00:48:52,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:48:52,749 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-01 00:48:52,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 00:48:52,750 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-01 00:48:52,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:48:52,751 INFO L225 Difference]: With dead ends: 23 [2018-10-01 00:48:52,751 INFO L226 Difference]: Without dead ends: 21 [2018-10-01 00:48:52,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 00:48:52,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-01 00:48:52,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-01 00:48:52,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-01 00:48:52,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-01 00:48:52,756 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-10-01 00:48:52,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:48:52,757 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-01 00:48:52,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 00:48:52,757 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-01 00:48:52,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-01 00:48:52,758 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:48:52,758 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-10-01 00:48:52,758 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:48:52,758 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:48:52,758 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-10-01 00:48:52,759 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:48:52,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:48:52,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:52,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:48:52,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:52,770 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:48:52,771 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:48:52,771 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:48:52,790 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:48:52,805 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:48:52,806 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:48:52,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:48:53,155 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:48:53,175 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:48:53,176 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-10-01 00:48:53,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:48:53,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:48:53,176 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:48:53,176 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-10-01 00:48:53,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:48:53,605 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-01 00:48:53,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:48:53,605 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-01 00:48:53,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:48:53,606 INFO L225 Difference]: With dead ends: 25 [2018-10-01 00:48:53,606 INFO L226 Difference]: Without dead ends: 23 [2018-10-01 00:48:53,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 00:48:53,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-01 00:48:53,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-01 00:48:53,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-01 00:48:53,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-01 00:48:53,612 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-10-01 00:48:53,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:48:53,613 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-01 00:48:53,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:48:53,613 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-01 00:48:53,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-01 00:48:53,614 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:48:53,614 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-10-01 00:48:53,614 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:48:53,614 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:48:53,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-10-01 00:48:53,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:48:53,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:48:53,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:53,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:48:53,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:53,626 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:48:53,626 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:48:53,627 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:48:53,642 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:48:53,667 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 00:48:53,667 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:48:53,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:48:53,877 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:48:53,899 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:48:53,899 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-10-01 00:48:53,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:48:53,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:48:53,900 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:48:53,900 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-10-01 00:48:54,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:48:54,452 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-01 00:48:54,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:48:54,453 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-01 00:48:54,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:48:54,453 INFO L225 Difference]: With dead ends: 27 [2018-10-01 00:48:54,454 INFO L226 Difference]: Without dead ends: 25 [2018-10-01 00:48:54,454 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 00:48:54,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-01 00:48:54,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-01 00:48:54,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-01 00:48:54,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-01 00:48:54,460 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-10-01 00:48:54,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:48:54,460 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-01 00:48:54,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:48:54,460 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-01 00:48:54,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-01 00:48:54,461 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:48:54,461 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-10-01 00:48:54,461 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:48:54,461 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:48:54,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-10-01 00:48:54,462 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:48:54,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:48:54,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:54,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:48:54,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:54,473 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:48:54,474 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:48:54,474 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:48:54,484 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:48:54,500 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:48:54,501 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:48:54,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:48:54,664 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:48:54,684 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:48:54,685 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-10-01 00:48:54,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-01 00:48:54,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-01 00:48:54,685 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:48:54,685 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-10-01 00:48:55,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:48:55,493 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-01 00:48:55,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-01 00:48:55,499 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-01 00:48:55,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:48:55,500 INFO L225 Difference]: With dead ends: 29 [2018-10-01 00:48:55,500 INFO L226 Difference]: Without dead ends: 27 [2018-10-01 00:48:55,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 00:48:55,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-01 00:48:55,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-01 00:48:55,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-01 00:48:55,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-01 00:48:55,505 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-10-01 00:48:55,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:48:55,506 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-01 00:48:55,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-01 00:48:55,506 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-01 00:48:55,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-01 00:48:55,507 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:48:55,507 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-10-01 00:48:55,507 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:48:55,507 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:48:55,508 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-10-01 00:48:55,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:48:55,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:48:55,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:55,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:48:55,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:55,518 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:48:55,518 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:48:55,519 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:48:55,532 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:48:55,557 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-01 00:48:55,557 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:48:55,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:48:55,808 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:48:55,840 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:48:55,840 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-10-01 00:48:55,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-01 00:48:55,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-01 00:48:55,841 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:48:55,841 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-10-01 00:48:56,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:48:56,801 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-01 00:48:56,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-01 00:48:56,802 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-01 00:48:56,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:48:56,803 INFO L225 Difference]: With dead ends: 31 [2018-10-01 00:48:56,803 INFO L226 Difference]: Without dead ends: 29 [2018-10-01 00:48:56,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 00:48:56,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-01 00:48:56,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-01 00:48:56,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-01 00:48:56,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-01 00:48:56,809 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-10-01 00:48:56,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:48:56,809 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-01 00:48:56,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-01 00:48:56,809 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-01 00:48:56,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-01 00:48:56,810 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:48:56,810 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-10-01 00:48:56,810 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:48:56,811 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:48:56,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-10-01 00:48:56,811 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:48:56,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:48:56,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:56,812 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:48:56,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:56,822 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:48:56,823 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:48:56,823 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:48:56,836 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:48:56,866 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-01 00:48:56,866 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:48:56,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:48:57,105 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:48:57,126 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:48:57,126 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-10-01 00:48:57,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-01 00:48:57,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-01 00:48:57,127 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:48:57,127 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-10-01 00:48:58,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:48:58,075 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-01 00:48:58,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-01 00:48:58,076 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-01 00:48:58,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:48:58,076 INFO L225 Difference]: With dead ends: 33 [2018-10-01 00:48:58,077 INFO L226 Difference]: Without dead ends: 31 [2018-10-01 00:48:58,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 00:48:58,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-01 00:48:58,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-01 00:48:58,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-01 00:48:58,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-01 00:48:58,083 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-10-01 00:48:58,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:48:58,083 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-01 00:48:58,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-01 00:48:58,084 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-01 00:48:58,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-01 00:48:58,088 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:48:58,089 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-10-01 00:48:58,089 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:48:58,089 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:48:58,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-10-01 00:48:58,089 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:48:58,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:48:58,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:58,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:48:58,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:58,110 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:48:58,110 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:48:58,111 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:48:58,126 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:48:58,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:48:58,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:48:58,411 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:48:58,432 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:48:58,432 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-10-01 00:48:58,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-01 00:48:58,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-01 00:48:58,433 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:48:58,433 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-10-01 00:48:59,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:48:59,298 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-01 00:48:59,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-01 00:48:59,298 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-01 00:48:59,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:48:59,299 INFO L225 Difference]: With dead ends: 35 [2018-10-01 00:48:59,299 INFO L226 Difference]: Without dead ends: 33 [2018-10-01 00:48:59,300 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 00:48:59,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-01 00:48:59,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-01 00:48:59,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-01 00:48:59,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-01 00:48:59,306 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-10-01 00:48:59,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:48:59,306 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-01 00:48:59,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-01 00:48:59,307 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-01 00:48:59,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-01 00:48:59,308 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:48:59,308 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-10-01 00:48:59,308 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:48:59,308 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:48:59,308 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-10-01 00:48:59,309 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:48:59,309 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:48:59,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:59,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:48:59,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:59,320 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:48:59,321 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:48:59,321 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:48:59,349 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:48:59,381 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:48:59,381 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:48:59,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:49:00,028 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:49:00,050 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:49:00,050 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-10-01 00:49:00,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-01 00:49:00,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-01 00:49:00,051 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:49:00,051 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-10-01 00:49:01,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:49:01,276 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-01 00:49:01,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-01 00:49:01,277 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-01 00:49:01,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:49:01,278 INFO L225 Difference]: With dead ends: 37 [2018-10-01 00:49:01,278 INFO L226 Difference]: Without dead ends: 35 [2018-10-01 00:49:01,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-10-01 00:49:01,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-01 00:49:01,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-01 00:49:01,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-01 00:49:01,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-01 00:49:01,284 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-10-01 00:49:01,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:49:01,284 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-01 00:49:01,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-01 00:49:01,284 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-01 00:49:01,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-01 00:49:01,285 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:49:01,285 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-10-01 00:49:01,286 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:49:01,286 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:49:01,286 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-10-01 00:49:01,286 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:49:01,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:49:01,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:01,287 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:49:01,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:01,301 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:49:01,301 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:49:01,301 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:49:01,319 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:49:01,384 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-01 00:49:01,385 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:49:01,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:49:02,836 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:49:02,867 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:49:02,867 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-01 00:49:02,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-01 00:49:02,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-01 00:49:02,868 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:49:02,868 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-10-01 00:49:03,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:49:03,987 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-01 00:49:03,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-01 00:49:03,994 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-01 00:49:03,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:49:03,994 INFO L225 Difference]: With dead ends: 39 [2018-10-01 00:49:03,994 INFO L226 Difference]: Without dead ends: 37 [2018-10-01 00:49:03,995 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-10-01 00:49:03,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-01 00:49:04,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-01 00:49:04,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-01 00:49:04,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-01 00:49:04,002 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-10-01 00:49:04,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:49:04,002 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-01 00:49:04,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-01 00:49:04,003 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-01 00:49:04,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-01 00:49:04,003 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:49:04,003 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-10-01 00:49:04,004 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:49:04,004 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:49:04,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-10-01 00:49:04,004 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:49:04,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:49:04,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:04,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:49:04,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:04,024 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:49:04,024 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:49:04,024 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:49:04,039 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:49:04,064 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:49:04,065 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:49:04,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:49:04,409 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:49:04,431 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:49:04,431 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-10-01 00:49:04,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-01 00:49:04,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-01 00:49:04,432 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:49:04,432 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-10-01 00:49:05,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:49:05,707 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-01 00:49:05,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-01 00:49:05,714 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-01 00:49:05,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:49:05,714 INFO L225 Difference]: With dead ends: 41 [2018-10-01 00:49:05,714 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 00:49:05,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 00:49:05,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 00:49:05,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-01 00:49:05,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-01 00:49:05,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-01 00:49:05,727 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-10-01 00:49:05,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:49:05,727 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-01 00:49:05,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-01 00:49:05,727 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-01 00:49:05,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-01 00:49:05,728 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:49:05,728 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-10-01 00:49:05,728 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:49:05,729 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:49:05,729 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-10-01 00:49:05,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:49:05,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:49:05,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:05,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:49:05,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:05,738 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:49:05,739 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:49:05,739 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:49:05,765 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:49:05,800 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-01 00:49:05,800 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:49:05,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:49:06,305 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:49:06,326 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:49:06,326 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-10-01 00:49:06,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-01 00:49:06,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-01 00:49:06,327 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:49:06,327 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-10-01 00:49:07,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:49:07,949 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-01 00:49:07,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-01 00:49:07,949 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-01 00:49:07,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:49:07,950 INFO L225 Difference]: With dead ends: 43 [2018-10-01 00:49:07,950 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 00:49:07,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 00:49:07,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 00:49:07,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-01 00:49:07,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-01 00:49:07,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-01 00:49:07,961 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-10-01 00:49:07,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:49:07,961 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-01 00:49:07,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-01 00:49:07,962 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-01 00:49:07,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-01 00:49:07,962 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:49:07,963 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-10-01 00:49:07,963 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:49:07,963 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:49:07,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-10-01 00:49:07,963 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:49:07,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:49:07,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:07,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:49:07,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:07,975 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:49:07,976 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:49:07,976 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:49:07,989 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:49:08,056 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-01 00:49:08,056 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:49:08,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:49:08,394 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:49:08,415 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:49:08,416 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-10-01 00:49:08,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-01 00:49:08,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-01 00:49:08,416 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:49:08,416 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-10-01 00:49:10,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:49:10,266 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-01 00:49:10,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-01 00:49:10,266 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-10-01 00:49:10,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:49:10,267 INFO L225 Difference]: With dead ends: 45 [2018-10-01 00:49:10,267 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 00:49:10,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 00:49:10,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 00:49:10,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-01 00:49:10,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-01 00:49:10,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-01 00:49:10,272 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-10-01 00:49:10,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:49:10,272 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-01 00:49:10,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-01 00:49:10,272 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-01 00:49:10,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-01 00:49:10,273 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:49:10,273 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-10-01 00:49:10,274 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:49:10,274 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:49:10,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-10-01 00:49:10,274 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:49:10,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:49:10,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:10,275 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:49:10,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:10,282 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:49:10,283 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:49:10,283 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:49:10,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:49:10,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:49:10,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:49:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:49:10,739 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:49:10,739 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-10-01 00:49:10,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-01 00:49:10,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-01 00:49:10,740 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:49:10,740 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-10-01 00:49:12,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:49:12,503 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-01 00:49:12,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-01 00:49:12,504 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-10-01 00:49:12,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:49:12,505 INFO L225 Difference]: With dead ends: 47 [2018-10-01 00:49:12,505 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 00:49:12,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 00:49:12,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 00:49:12,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-01 00:49:12,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-01 00:49:12,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-01 00:49:12,512 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-10-01 00:49:12,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:49:12,513 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-01 00:49:12,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-01 00:49:12,513 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-01 00:49:12,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-01 00:49:12,514 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:49:12,514 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-10-01 00:49:12,514 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:49:12,514 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:49:12,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-10-01 00:49:12,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:49:12,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:49:12,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:12,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:49:12,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:12,523 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:49:12,523 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:49:12,523 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:49:12,539 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:49:12,573 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:49:12,573 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:49:12,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:49:13,094 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:49:13,115 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:49:13,116 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-10-01 00:49:13,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-01 00:49:13,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-01 00:49:13,116 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:49:13,117 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-10-01 00:49:15,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:49:15,012 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-01 00:49:15,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-01 00:49:15,013 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-10-01 00:49:15,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:49:15,013 INFO L225 Difference]: With dead ends: 49 [2018-10-01 00:49:15,014 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 00:49:15,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 00:49:15,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 00:49:15,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-01 00:49:15,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-01 00:49:15,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-01 00:49:15,020 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-10-01 00:49:15,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:49:15,021 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-01 00:49:15,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-01 00:49:15,021 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-01 00:49:15,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-01 00:49:15,022 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:49:15,022 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-10-01 00:49:15,023 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:49:15,023 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:49:15,023 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-10-01 00:49:15,023 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:49:15,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:49:15,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:15,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:49:15,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:15,032 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:49:15,032 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:49:15,032 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:49:15,058 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:49:15,192 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-01 00:49:15,193 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:49:15,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:49:15,609 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:49:15,630 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:49:15,630 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-10-01 00:49:15,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-01 00:49:15,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-01 00:49:15,631 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:49:15,631 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-10-01 00:49:17,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:49:17,743 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-01 00:49:17,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-01 00:49:17,746 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-10-01 00:49:17,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:49:17,747 INFO L225 Difference]: With dead ends: 51 [2018-10-01 00:49:17,747 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 00:49:17,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 00:49:17,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 00:49:17,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-01 00:49:17,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-01 00:49:17,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-01 00:49:17,754 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-10-01 00:49:17,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:49:17,755 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-01 00:49:17,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-01 00:49:17,755 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-01 00:49:17,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-01 00:49:17,756 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:49:17,756 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-10-01 00:49:17,756 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:49:17,756 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:49:17,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-10-01 00:49:17,756 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:49:17,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:49:17,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:17,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:49:17,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:17,765 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:49:17,765 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:49:17,765 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:49:17,781 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:49:17,820 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:49:17,820 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:49:17,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:49:18,292 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:49:18,314 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:49:18,314 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-10-01 00:49:18,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-01 00:49:18,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-01 00:49:18,314 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:49:18,314 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-10-01 00:49:20,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:49:20,489 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-01 00:49:20,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-01 00:49:20,490 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-10-01 00:49:20,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:49:20,491 INFO L225 Difference]: With dead ends: 53 [2018-10-01 00:49:20,491 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 00:49:20,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 00:49:20,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 00:49:20,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-01 00:49:20,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-01 00:49:20,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-01 00:49:20,498 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-10-01 00:49:20,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:49:20,498 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-01 00:49:20,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-01 00:49:20,499 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-01 00:49:20,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-01 00:49:20,499 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:49:20,499 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-10-01 00:49:20,500 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:49:20,500 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:49:20,500 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-10-01 00:49:20,500 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:49:20,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:49:20,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:20,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:49:20,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:20,508 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:49:20,508 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:49:20,508 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2018-10-01 00:49:20,529 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:49:20,584 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-01 00:49:20,584 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:49:20,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:49:21,041 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:49:21,061 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:49:21,061 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-10-01 00:49:21,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-01 00:49:21,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-01 00:49:21,062 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:49:21,062 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-10-01 00:49:23,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:49:23,693 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-01 00:49:23,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-01 00:49:23,693 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-10-01 00:49:23,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:49:23,694 INFO L225 Difference]: With dead ends: 55 [2018-10-01 00:49:23,694 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 00:49:23,694 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 00:49:23,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 00:49:23,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-01 00:49:23,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-01 00:49:23,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-01 00:49:23,699 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-10-01 00:49:23,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:49:23,699 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-01 00:49:23,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-01 00:49:23,700 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-01 00:49:23,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-01 00:49:23,700 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:49:23,700 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-10-01 00:49:23,700 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:49:23,701 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:49:23,701 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-10-01 00:49:23,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:49:23,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:49:23,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:23,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:49:23,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:23,709 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:49:23,709 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:49:23,709 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:49:23,732 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:49:23,830 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-01 00:49:23,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:49:23,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:49:24,397 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:49:24,417 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:49:24,418 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-10-01 00:49:24,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-01 00:49:24,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-01 00:49:24,418 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:49:24,418 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-10-01 00:49:27,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:49:27,053 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-01 00:49:27,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-01 00:49:27,053 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-10-01 00:49:27,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:49:27,054 INFO L225 Difference]: With dead ends: 57 [2018-10-01 00:49:27,054 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 00:49:27,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 00:49:27,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 00:49:27,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-01 00:49:27,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-01 00:49:27,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-01 00:49:27,062 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-10-01 00:49:27,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:49:27,062 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-01 00:49:27,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-01 00:49:27,062 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-01 00:49:27,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-01 00:49:27,063 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:49:27,063 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-10-01 00:49:27,063 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:49:27,063 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:49:27,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-10-01 00:49:27,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:49:27,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:49:27,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:27,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:49:27,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:27,071 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:49:27,072 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:49:27,072 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 (exit command is (exit), workingDir is null) [2018-10-01 00:49:27,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:49:27,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:49:27,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:49:27,866 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:49:27,886 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:49:27,887 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-10-01 00:49:27,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-01 00:49:27,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-01 00:49:27,887 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:49:27,887 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-10-01 00:49:30,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:49:30,865 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-01 00:49:30,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-01 00:49:30,865 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-10-01 00:49:30,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:49:30,866 INFO L225 Difference]: With dead ends: 59 [2018-10-01 00:49:30,866 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 00:49:30,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-10-01 00:49:30,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 00:49:30,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-01 00:49:30,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-01 00:49:30,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-01 00:49:30,871 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-10-01 00:49:30,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:49:30,873 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-01 00:49:30,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-01 00:49:30,873 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-01 00:49:30,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-01 00:49:30,873 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:49:30,873 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-10-01 00:49:30,873 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:49:30,874 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:49:30,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-10-01 00:49:30,874 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:49:30,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:49:30,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:30,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:49:30,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:30,881 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:49:30,884 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:49:30,885 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:49:30,899 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:49:30,943 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:49:30,943 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:49:30,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:49:31,507 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:49:31,528 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:49:31,528 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-10-01 00:49:31,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-01 00:49:31,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-01 00:49:31,528 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:49:31,528 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-10-01 00:49:34,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:49:34,830 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-01 00:49:34,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-01 00:49:34,831 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-10-01 00:49:34,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:49:34,832 INFO L225 Difference]: With dead ends: 61 [2018-10-01 00:49:34,832 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 00:49:34,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 00:49:34,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 00:49:34,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-01 00:49:34,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-01 00:49:34,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-01 00:49:34,837 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-10-01 00:49:34,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:49:34,837 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-01 00:49:34,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-01 00:49:34,838 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-01 00:49:34,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-01 00:49:34,838 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:49:34,838 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-10-01 00:49:34,839 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:49:34,839 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:49:34,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-10-01 00:49:34,839 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:49:34,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:49:34,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:34,840 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:49:34,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:34,846 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:49:34,846 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:49:34,847 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:49:34,862 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:49:35,179 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-01 00:49:35,179 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:49:35,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:49:35,881 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:49:35,903 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:49:35,903 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-10-01 00:49:35,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-01 00:49:35,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-01 00:49:35,904 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:49:35,904 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-10-01 00:49:39,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:49:39,398 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-01 00:49:39,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-01 00:49:39,399 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-10-01 00:49:39,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:49:39,400 INFO L225 Difference]: With dead ends: 63 [2018-10-01 00:49:39,400 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 00:49:39,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-10-01 00:49:39,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 00:49:39,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-01 00:49:39,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-01 00:49:39,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-01 00:49:39,405 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-10-01 00:49:39,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:49:39,405 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-01 00:49:39,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-01 00:49:39,405 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-01 00:49:39,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-01 00:49:39,405 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:49:39,405 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-10-01 00:49:39,406 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:49:39,406 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:49:39,406 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-10-01 00:49:39,406 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:49:39,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:49:39,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:39,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:49:39,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:39,413 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:49:39,414 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:49:39,414 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:49:39,428 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:49:39,477 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:49:39,477 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:49:39,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:49:40,157 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:49:40,178 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:49:40,178 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-10-01 00:49:40,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-01 00:49:40,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-01 00:49:40,178 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:49:40,178 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-10-01 00:49:44,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:49:44,189 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-01 00:49:44,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-01 00:49:44,189 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-10-01 00:49:44,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:49:44,190 INFO L225 Difference]: With dead ends: 65 [2018-10-01 00:49:44,190 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 00:49:44,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-10-01 00:49:44,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 00:49:44,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-01 00:49:44,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-01 00:49:44,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-01 00:49:44,196 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-10-01 00:49:44,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:49:44,196 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-01 00:49:44,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-01 00:49:44,196 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-01 00:49:44,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-01 00:49:44,197 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:49:44,197 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-10-01 00:49:44,197 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:49:44,197 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:49:44,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-10-01 00:49:44,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:49:44,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:49:44,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:44,199 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:49:44,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:44,205 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:49:44,206 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:49:44,206 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:49:44,222 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:49:44,295 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-01 00:49:44,295 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:49:44,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:49:45,016 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:49:45,036 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:49:45,036 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-10-01 00:49:45,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-01 00:49:45,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-01 00:49:45,037 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:49:45,037 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2018-10-01 00:49:49,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:49:49,049 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-01 00:49:49,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-01 00:49:49,049 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-10-01 00:49:49,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:49:49,050 INFO L225 Difference]: With dead ends: 67 [2018-10-01 00:49:49,050 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 00:49:49,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-10-01 00:49:49,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 00:49:49,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-01 00:49:49,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-01 00:49:49,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-01 00:49:49,056 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-10-01 00:49:49,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:49:49,056 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-01 00:49:49,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-01 00:49:49,056 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-01 00:49:49,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-01 00:49:49,057 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:49:49,057 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1] [2018-10-01 00:49:49,057 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:49:49,057 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:49:49,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1538531309, now seen corresponding path program 30 times [2018-10-01 00:49:49,057 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:49:49,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:49:49,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:49,058 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:49:49,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:49,065 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:49:49,065 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:49:49,066 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:49:49,082 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:49:49,419 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-01 00:49:49,419 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:49:49,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:49:50,266 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:49:50,287 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:49:50,287 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-01 00:49:50,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-01 00:49:50,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-01 00:49:50,287 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:49:50,287 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2018-10-01 00:49:54,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:49:54,573 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-01 00:49:54,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-01 00:49:54,574 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-10-01 00:49:54,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:49:54,575 INFO L225 Difference]: With dead ends: 69 [2018-10-01 00:49:54,575 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 00:49:54,575 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-10-01 00:49:54,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 00:49:54,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-01 00:49:54,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-01 00:49:54,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-01 00:49:54,582 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-10-01 00:49:54,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:49:54,582 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-01 00:49:54,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-01 00:49:54,582 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-01 00:49:54,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-01 00:49:54,583 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:49:54,583 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-10-01 00:49:54,583 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:49:54,583 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:49:54,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 31 times [2018-10-01 00:49:54,583 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:49:54,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:49:54,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:54,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:49:54,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:54,591 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:49:54,591 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:49:54,591 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:49:54,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:49:54,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:49:54,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:49:55,577 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:49:55,597 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:49:55,597 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-10-01 00:49:55,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-01 00:49:55,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-01 00:49:55,598 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:49:55,598 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2018-10-01 00:50:00,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:50:00,293 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-01 00:50:00,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-01 00:50:00,293 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-10-01 00:50:00,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:50:00,294 INFO L225 Difference]: With dead ends: 71 [2018-10-01 00:50:00,294 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 00:50:00,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-10-01 00:50:00,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 00:50:00,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-01 00:50:00,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-01 00:50:00,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-01 00:50:00,300 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-10-01 00:50:00,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:50:00,300 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-01 00:50:00,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-01 00:50:00,300 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-01 00:50:00,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-01 00:50:00,301 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:50:00,301 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1] [2018-10-01 00:50:00,301 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:50:00,301 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:50:00,301 INFO L82 PathProgramCache]: Analyzing trace with hash -547078393, now seen corresponding path program 32 times [2018-10-01 00:50:00,301 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:50:00,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:50:00,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:50:00,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:50:00,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:50:00,308 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:50:00,308 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:50:00,309 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:50:00,320 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:50:00,400 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:50:00,400 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:50:00,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:50:02,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:50:02,051 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:50:02,051 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-10-01 00:50:02,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-01 00:50:02,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-01 00:50:02,052 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:50:02,052 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2018-10-01 00:50:07,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:50:07,116 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-01 00:50:07,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-01 00:50:07,117 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-10-01 00:50:07,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:50:07,118 INFO L225 Difference]: With dead ends: 73 [2018-10-01 00:50:07,118 INFO L226 Difference]: Without dead ends: 71 [2018-10-01 00:50:07,118 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time [2018-10-01 00:50:07,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-01 00:50:07,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-01 00:50:07,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-01 00:50:07,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-01 00:50:07,123 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-10-01 00:50:07,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:50:07,124 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-01 00:50:07,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-01 00:50:07,124 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-01 00:50:07,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-01 00:50:07,124 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:50:07,124 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-10-01 00:50:07,125 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:50:07,125 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:50:07,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 33 times [2018-10-01 00:50:07,125 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:50:07,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:50:07,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:50:07,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:50:07,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:50:07,134 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:50:07,134 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:50:07,134 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:50:07,148 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:50:07,850 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-01 00:50:07,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:50:07,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:50:08,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:50:08,885 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:50:08,885 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-10-01 00:50:08,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-01 00:50:08,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-01 00:50:08,885 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:50:08,885 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2018-10-01 00:50:14,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:50:14,004 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-01 00:50:14,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-01 00:50:14,004 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-10-01 00:50:14,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:50:14,006 INFO L225 Difference]: With dead ends: 75 [2018-10-01 00:50:14,006 INFO L226 Difference]: Without dead ends: 73 [2018-10-01 00:50:14,006 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-10-01 00:50:14,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-01 00:50:14,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-01 00:50:14,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-01 00:50:14,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-01 00:50:14,012 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-10-01 00:50:14,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:50:14,013 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-01 00:50:14,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-01 00:50:14,013 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-01 00:50:14,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-01 00:50:14,013 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:50:14,014 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1] [2018-10-01 00:50:14,014 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:50:14,014 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:50:14,014 INFO L82 PathProgramCache]: Analyzing trace with hash 143393787, now seen corresponding path program 34 times [2018-10-01 00:50:14,014 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:50:14,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:50:14,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:50:14,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:50:14,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:50:14,021 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:50:14,022 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:50:14,022 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:50:14,036 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:50:14,094 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:50:14,095 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:50:14,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:50:15,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:50:15,099 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:50:15,099 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-10-01 00:50:15,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-01 00:50:15,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-01 00:50:15,100 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:50:15,100 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2018-10-01 00:50:20,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:50:20,833 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-01 00:50:20,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-01 00:50:20,833 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-10-01 00:50:20,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:50:20,834 INFO L225 Difference]: With dead ends: 77 [2018-10-01 00:50:20,834 INFO L226 Difference]: Without dead ends: 75 [2018-10-01 00:50:20,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-10-01 00:50:20,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-01 00:50:20,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-01 00:50:20,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-01 00:50:20,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-01 00:50:20,839 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-10-01 00:50:20,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:50:20,840 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-01 00:50:20,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-01 00:50:20,840 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-01 00:50:20,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-01 00:50:20,840 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:50:20,840 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-10-01 00:50:20,841 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:50:20,841 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:50:20,841 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 35 times [2018-10-01 00:50:20,841 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:50:20,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:50:20,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:50:20,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:50:20,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:50:20,848 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:50:20,848 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:50:20,848 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:50:20,863 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:50:20,952 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-01 00:50:20,952 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:50:20,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:50:21,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:50:21,967 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:50:21,967 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-10-01 00:50:21,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-01 00:50:21,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-01 00:50:21,967 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:50:21,967 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2018-10-01 00:50:27,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:50:27,945 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-01 00:50:27,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-01 00:50:27,946 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-10-01 00:50:27,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:50:27,947 INFO L225 Difference]: With dead ends: 79 [2018-10-01 00:50:27,947 INFO L226 Difference]: Without dead ends: 77 [2018-10-01 00:50:27,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-10-01 00:50:27,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-01 00:50:27,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-01 00:50:27,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-01 00:50:27,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-01 00:50:27,952 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-10-01 00:50:27,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:50:27,953 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-01 00:50:27,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-01 00:50:27,953 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-01 00:50:27,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-01 00:50:27,953 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:50:27,953 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1] [2018-10-01 00:50:27,954 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:50:27,954 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:50:27,954 INFO L82 PathProgramCache]: Analyzing trace with hash 497037039, now seen corresponding path program 36 times [2018-10-01 00:50:27,954 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:50:27,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:50:27,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:50:27,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:50:27,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:50:27,962 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:50:27,962 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:50:27,962 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:50:27,977 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:50:28,239 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-01 00:50:28,240 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:50:28,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:50:29,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:50:29,535 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:50:29,535 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-10-01 00:50:29,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-01 00:50:29,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-01 00:50:29,536 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:50:29,536 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2018-10-01 00:50:35,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:50:35,720 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-01 00:50:35,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-01 00:50:35,720 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-10-01 00:50:35,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:50:35,721 INFO L225 Difference]: With dead ends: 81 [2018-10-01 00:50:35,721 INFO L226 Difference]: Without dead ends: 79 [2018-10-01 00:50:35,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-10-01 00:50:35,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-01 00:50:35,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-01 00:50:35,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-01 00:50:35,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-01 00:50:35,727 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-10-01 00:50:35,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:50:35,727 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-01 00:50:35,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-01 00:50:35,727 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-01 00:50:35,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-01 00:50:35,728 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:50:35,728 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-10-01 00:50:35,728 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:50:35,728 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:50:35,728 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 37 times [2018-10-01 00:50:35,728 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:50:35,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:50:35,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:50:35,729 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:50:35,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:50:35,736 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:50:35,736 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:50:35,736 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:50:35,744 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:50:35,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:50:35,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:50:36,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:50:36,873 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:50:36,873 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-10-01 00:50:36,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-01 00:50:36,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-01 00:50:36,873 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:50:36,873 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2018-10-01 00:50:43,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:50:43,122 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-01 00:50:43,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-01 00:50:43,123 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-10-01 00:50:43,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:50:43,123 INFO L225 Difference]: With dead ends: 83 [2018-10-01 00:50:43,124 INFO L226 Difference]: Without dead ends: 81 [2018-10-01 00:50:43,124 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-10-01 00:50:43,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-01 00:50:43,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-01 00:50:43,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-01 00:50:43,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-10-01 00:50:43,129 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-10-01 00:50:43,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:50:43,129 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-10-01 00:50:43,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-01 00:50:43,129 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-10-01 00:50:43,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-01 00:50:43,130 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:50:43,130 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1] [2018-10-01 00:50:43,130 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:50:43,130 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:50:43,131 INFO L82 PathProgramCache]: Analyzing trace with hash -436355101, now seen corresponding path program 38 times [2018-10-01 00:50:43,131 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:50:43,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:50:43,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:50:43,131 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:50:43,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:50:43,138 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:50:43,138 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:50:43,139 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:50:43,154 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:50:43,238 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:50:43,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:50:43,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:50:44,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:50:45,012 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:50:45,013 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-10-01 00:50:45,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-01 00:50:45,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-01 00:50:45,013 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:50:45,013 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2018-10-01 00:50:51,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:50:51,584 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-01 00:50:51,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-01 00:50:51,584 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-10-01 00:50:51,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:50:51,585 INFO L225 Difference]: With dead ends: 85 [2018-10-01 00:50:51,585 INFO L226 Difference]: Without dead ends: 83 [2018-10-01 00:50:51,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time [2018-10-01 00:50:51,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-01 00:50:51,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-01 00:50:51,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-01 00:50:51,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-01 00:50:51,590 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2018-10-01 00:50:51,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:50:51,590 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-01 00:50:51,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-01 00:50:51,590 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-01 00:50:51,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-01 00:50:51,591 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:50:51,591 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-10-01 00:50:51,591 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:50:51,591 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:50:51,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 39 times [2018-10-01 00:50:51,591 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:50:51,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:50:51,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:50:51,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:50:51,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:50:51,598 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:50:51,599 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:50:51,599 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:50:51,617 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:50:53,120 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-01 00:50:53,121 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:50:53,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:50:54,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:50:54,232 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:50:54,233 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-10-01 00:50:54,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-01 00:50:54,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-01 00:50:54,233 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:50:54,233 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2018-10-01 00:51:01,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:51:01,187 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-01 00:51:01,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-01 00:51:01,188 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-10-01 00:51:01,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:51:01,189 INFO L225 Difference]: With dead ends: 87 [2018-10-01 00:51:01,189 INFO L226 Difference]: Without dead ends: 85 [2018-10-01 00:51:01,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-10-01 00:51:01,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-01 00:51:01,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-01 00:51:01,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-01 00:51:01,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-10-01 00:51:01,194 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2018-10-01 00:51:01,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:51:01,195 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-10-01 00:51:01,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-01 00:51:01,195 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-10-01 00:51:01,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-01 00:51:01,195 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:51:01,195 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1] [2018-10-01 00:51:01,195 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:51:01,195 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:51:01,196 INFO L82 PathProgramCache]: Analyzing trace with hash 847361751, now seen corresponding path program 40 times [2018-10-01 00:51:01,196 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:51:01,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:51:01,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:51:01,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:51:01,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:51:01,203 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:51:01,204 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:51:01,204 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:51:01,221 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:51:01,322 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:51:01,322 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:51:01,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:51:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:51:02,760 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:51:02,760 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-10-01 00:51:02,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-01 00:51:02,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-01 00:51:02,760 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:51:02,760 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2018-10-01 00:51:10,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:51:10,320 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-01 00:51:10,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-01 00:51:10,320 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-10-01 00:51:10,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:51:10,321 INFO L225 Difference]: With dead ends: 89 [2018-10-01 00:51:10,321 INFO L226 Difference]: Without dead ends: 87 [2018-10-01 00:51:10,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time [2018-10-01 00:51:10,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-01 00:51:10,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-01 00:51:10,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-01 00:51:10,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-01 00:51:10,328 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2018-10-01 00:51:10,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:51:10,328 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-01 00:51:10,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-01 00:51:10,328 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-01 00:51:10,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-01 00:51:10,329 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:51:10,329 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-10-01 00:51:10,329 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:51:10,329 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:51:10,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 41 times [2018-10-01 00:51:10,329 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:51:10,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:51:10,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:51:10,330 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:51:10,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:51:10,337 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:51:10,338 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:51:10,338 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:51:10,350 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:51:10,497 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-01 00:51:10,497 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:51:10,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:51:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:51:13,145 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:51:13,145 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-10-01 00:51:13,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-01 00:51:13,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-01 00:51:13,146 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:51:13,146 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2018-10-01 00:51:20,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:51:20,878 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-01 00:51:20,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-01 00:51:20,879 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-10-01 00:51:20,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:51:20,879 INFO L225 Difference]: With dead ends: 91 [2018-10-01 00:51:20,879 INFO L226 Difference]: Without dead ends: 89 [2018-10-01 00:51:20,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time [2018-10-01 00:51:20,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-01 00:51:20,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-01 00:51:20,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-01 00:51:20,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-01 00:51:20,884 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2018-10-01 00:51:20,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:51:20,885 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-01 00:51:20,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-01 00:51:20,885 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-01 00:51:20,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-01 00:51:20,885 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:51:20,885 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1] [2018-10-01 00:51:20,885 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:51:20,885 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:51:20,886 INFO L82 PathProgramCache]: Analyzing trace with hash 495522763, now seen corresponding path program 42 times [2018-10-01 00:51:20,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:51:20,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:51:20,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:51:20,886 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:51:20,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:51:20,892 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:51:20,893 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:51:20,893 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:51:20,901 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:51:21,219 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-01 00:51:21,220 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:51:21,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:51:22,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:51:22,476 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:51:22,476 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-10-01 00:51:22,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-01 00:51:22,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-01 00:51:22,477 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:51:22,477 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2018-10-01 00:51:30,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:51:30,507 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-01 00:51:30,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-01 00:51:30,507 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-10-01 00:51:30,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:51:30,508 INFO L225 Difference]: With dead ends: 93 [2018-10-01 00:51:30,508 INFO L226 Difference]: Without dead ends: 91 [2018-10-01 00:51:30,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-10-01 00:51:30,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-01 00:51:30,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-01 00:51:30,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-01 00:51:30,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-01 00:51:30,513 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2018-10-01 00:51:30,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:51:30,514 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-01 00:51:30,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-01 00:51:30,514 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-01 00:51:30,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-01 00:51:30,514 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:51:30,514 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-10-01 00:51:30,515 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:51:30,515 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:51:30,515 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 43 times [2018-10-01 00:51:30,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:51:30,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:51:30,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:51:30,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:51:30,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:51:30,522 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:51:30,522 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:51:30,522 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:51:30,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:51:30,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:51:30,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:51:31,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:51:31,985 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:51:31,985 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-10-01 00:51:31,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-01 00:51:31,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-01 00:51:31,986 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:51:31,986 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2018-10-01 00:51:40,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:51:40,437 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-01 00:51:40,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-01 00:51:40,437 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-10-01 00:51:40,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:51:40,438 INFO L225 Difference]: With dead ends: 95 [2018-10-01 00:51:40,438 INFO L226 Difference]: Without dead ends: 93 [2018-10-01 00:51:40,438 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time [2018-10-01 00:51:40,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-01 00:51:40,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-01 00:51:40,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-01 00:51:40,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-01 00:51:40,442 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2018-10-01 00:51:40,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:51:40,443 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-01 00:51:40,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-01 00:51:40,443 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-01 00:51:40,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-01 00:51:40,443 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:51:40,443 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1] [2018-10-01 00:51:40,444 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:51:40,444 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:51:40,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1257297599, now seen corresponding path program 44 times [2018-10-01 00:51:40,444 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:51:40,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:51:40,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:51:40,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:51:40,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:51:40,452 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:51:40,452 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:51:40,452 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:51:40,462 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:51:40,546 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:51:40,546 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:51:40,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:51:42,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:51:42,048 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:51:42,048 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-10-01 00:51:42,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-01 00:51:42,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-01 00:51:42,049 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:51:42,049 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2018-10-01 00:51:51,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:51:51,311 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-01 00:51:51,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-01 00:51:51,312 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-10-01 00:51:51,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:51:51,313 INFO L225 Difference]: With dead ends: 97 [2018-10-01 00:51:51,313 INFO L226 Difference]: Without dead ends: 95 [2018-10-01 00:51:51,313 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-10-01 00:51:51,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-01 00:51:51,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-01 00:51:51,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-01 00:51:51,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-01 00:51:51,319 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2018-10-01 00:51:51,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:51:51,319 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-01 00:51:51,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-01 00:51:51,319 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-01 00:51:51,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-01 00:51:51,320 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:51:51,320 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-10-01 00:51:51,320 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:51:51,320 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:51:51,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 45 times [2018-10-01 00:51:51,320 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:51:51,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:51:51,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:51:51,321 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:51:51,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:51:51,327 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:51:51,327 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:51:51,328 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:51:51,341 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:51:53,949 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-01 00:51:53,950 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:51:53,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:51:55,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:51:55,416 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:51:55,417 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-10-01 00:51:55,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-01 00:51:55,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-01 00:51:55,417 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:51:55,417 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2018-10-01 00:52:04,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:52:04,908 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-01 00:52:04,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-01 00:52:04,909 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-10-01 00:52:04,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:52:04,909 INFO L225 Difference]: With dead ends: 99 [2018-10-01 00:52:04,909 INFO L226 Difference]: Without dead ends: 97 [2018-10-01 00:52:04,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-10-01 00:52:04,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-01 00:52:04,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-01 00:52:04,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-01 00:52:04,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-10-01 00:52:04,914 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2018-10-01 00:52:04,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:52:04,914 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-10-01 00:52:04,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-01 00:52:04,914 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-10-01 00:52:04,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-01 00:52:04,915 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:52:04,915 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1] [2018-10-01 00:52:04,915 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:52:04,915 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:52:04,915 INFO L82 PathProgramCache]: Analyzing trace with hash 672530355, now seen corresponding path program 46 times [2018-10-01 00:52:04,915 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:52:04,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:52:04,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:52:04,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:52:04,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:52:04,922 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:52:04,922 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:52:04,922 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:52:04,934 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:52:05,062 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:52:05,063 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:52:05,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:52:06,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:52:06,811 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:52:06,811 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-01 00:52:06,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-01 00:52:06,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-01 00:52:06,811 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:52:06,812 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2018-10-01 00:52:16,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:52:16,691 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-01 00:52:16,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-01 00:52:16,691 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-10-01 00:52:16,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:52:16,692 INFO L225 Difference]: With dead ends: 101 [2018-10-01 00:52:16,692 INFO L226 Difference]: Without dead ends: 99 [2018-10-01 00:52:16,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time [2018-10-01 00:52:16,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-01 00:52:16,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-01 00:52:16,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-01 00:52:16,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-10-01 00:52:16,699 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2018-10-01 00:52:16,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:52:16,700 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-10-01 00:52:16,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-01 00:52:16,700 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-10-01 00:52:16,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-01 00:52:16,700 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:52:16,700 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-10-01 00:52:16,700 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:52:16,700 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:52:16,701 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 47 times [2018-10-01 00:52:16,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:52:16,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:52:16,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:52:16,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:52:16,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:52:16,707 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:52:16,707 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:52:16,707 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:52:16,716 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:52:16,874 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-01 00:52:16,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:52:16,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:52:19,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:52:19,915 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:52:19,915 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-10-01 00:52:19,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-01 00:52:19,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-01 00:52:19,916 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:52:19,916 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2018-10-01 00:52:30,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:52:30,053 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-01 00:52:30,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-01 00:52:30,054 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-10-01 00:52:30,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:52:30,055 INFO L225 Difference]: With dead ends: 103 [2018-10-01 00:52:30,055 INFO L226 Difference]: Without dead ends: 101 [2018-10-01 00:52:30,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time [2018-10-01 00:52:30,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-01 00:52:30,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-01 00:52:30,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-01 00:52:30,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-01 00:52:30,061 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2018-10-01 00:52:30,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:52:30,062 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-01 00:52:30,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-01 00:52:30,062 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-01 00:52:30,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-01 00:52:30,063 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:52:30,063 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1] [2018-10-01 00:52:30,063 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:52:30,063 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:52:30,063 INFO L82 PathProgramCache]: Analyzing trace with hash 735415975, now seen corresponding path program 48 times [2018-10-01 00:52:30,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:52:30,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:52:30,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:52:30,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:52:30,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:52:30,072 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:52:30,073 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:52:30,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:52:30,083 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:52:32,009 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-01 00:52:32,009 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:52:32,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:52:33,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:52:33,685 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:52:33,685 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-10-01 00:52:33,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-01 00:52:33,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-01 00:52:33,686 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:52:33,686 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2018-10-01 00:52:44,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:52:44,224 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-01 00:52:44,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-01 00:52:44,225 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-10-01 00:52:44,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:52:44,226 INFO L225 Difference]: With dead ends: 105 [2018-10-01 00:52:44,226 INFO L226 Difference]: Without dead ends: 103 [2018-10-01 00:52:44,226 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time [2018-10-01 00:52:44,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-01 00:52:44,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-01 00:52:44,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-01 00:52:44,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-01 00:52:44,233 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2018-10-01 00:52:44,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:52:44,233 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-01 00:52:44,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-01 00:52:44,233 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-01 00:52:44,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-01 00:52:44,234 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:52:44,234 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-10-01 00:52:44,234 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:52:44,234 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:52:44,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 49 times [2018-10-01 00:52:44,235 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:52:44,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:52:44,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:52:44,235 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:52:44,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:52:44,243 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:52:44,243 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:52:44,243 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:52:44,258 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:52:44,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:52:44,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:52:46,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:52:46,407 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:52:46,408 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-10-01 00:52:46,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-01 00:52:46,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-01 00:52:46,408 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:52:46,408 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2018-10-01 00:52:57,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:52:57,743 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-01 00:52:57,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-01 00:52:57,743 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-10-01 00:52:57,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:52:57,744 INFO L225 Difference]: With dead ends: 107 [2018-10-01 00:52:57,744 INFO L226 Difference]: Without dead ends: 105 [2018-10-01 00:52:57,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time [2018-10-01 00:52:57,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-01 00:52:57,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-01 00:52:57,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-01 00:52:57,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-10-01 00:52:57,750 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2018-10-01 00:52:57,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:52:57,751 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-10-01 00:52:57,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-01 00:52:57,751 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-10-01 00:52:57,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-01 00:52:57,751 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:52:57,752 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1] [2018-10-01 00:52:57,752 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:52:57,752 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:52:57,752 INFO L82 PathProgramCache]: Analyzing trace with hash 378307483, now seen corresponding path program 50 times [2018-10-01 00:52:57,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:52:57,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:52:57,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:52:57,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:52:57,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:52:57,762 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:52:57,762 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:52:57,762 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:52:57,778 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:52:57,880 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:52:57,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:52:57,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:52:59,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:52:59,786 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:52:59,786 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-10-01 00:52:59,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-01 00:52:59,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-01 00:52:59,787 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:52:59,787 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2018-10-01 00:53:11,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:53:11,475 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-01 00:53:11,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-01 00:53:11,475 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-10-01 00:53:11,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:53:11,476 INFO L225 Difference]: With dead ends: 109 [2018-10-01 00:53:11,476 INFO L226 Difference]: Without dead ends: 107 [2018-10-01 00:53:11,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time [2018-10-01 00:53:11,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-01 00:53:11,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-01 00:53:11,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-01 00:53:11,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-01 00:53:11,483 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2018-10-01 00:53:11,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:53:11,483 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-01 00:53:11,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-01 00:53:11,483 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-01 00:53:11,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-01 00:53:11,484 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:53:11,484 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-10-01 00:53:11,484 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:53:11,484 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:53:11,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 51 times [2018-10-01 00:53:11,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:53:11,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:53:11,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:53:11,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:53:11,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:53:11,492 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:53:11,493 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:53:11,493 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:53:11,510 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:53:16,215 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-01 00:53:16,215 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:53:16,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:53:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:53:18,220 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:53:18,220 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-10-01 00:53:18,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-01 00:53:18,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-01 00:53:18,220 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:53:18,221 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2018-10-01 00:53:30,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:53:30,808 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-01 00:53:30,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-01 00:53:30,809 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-10-01 00:53:30,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:53:30,809 INFO L225 Difference]: With dead ends: 111 [2018-10-01 00:53:30,809 INFO L226 Difference]: Without dead ends: 109 [2018-10-01 00:53:30,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time [2018-10-01 00:53:30,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-01 00:53:30,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-01 00:53:30,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-01 00:53:30,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-10-01 00:53:30,817 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2018-10-01 00:53:30,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:53:30,817 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-10-01 00:53:30,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-01 00:53:30,818 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-10-01 00:53:30,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-01 00:53:30,818 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:53:30,818 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1] [2018-10-01 00:53:30,818 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:53:30,819 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:53:30,819 INFO L82 PathProgramCache]: Analyzing trace with hash 840425103, now seen corresponding path program 52 times [2018-10-01 00:53:30,819 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:53:30,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:53:30,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:53:30,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:53:30,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:53:30,827 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:53:30,827 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:53:30,827 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:53:30,837 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:53:30,959 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:53:30,959 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:53:30,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:53:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:53:32,906 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:53:32,907 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-10-01 00:53:32,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-01 00:53:32,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-01 00:53:32,907 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:53:32,907 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2018-10-01 00:53:45,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:53:45,565 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-01 00:53:45,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-01 00:53:45,565 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-10-01 00:53:45,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:53:45,566 INFO L225 Difference]: With dead ends: 113 [2018-10-01 00:53:45,566 INFO L226 Difference]: Without dead ends: 111 [2018-10-01 00:53:45,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time [2018-10-01 00:53:45,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-01 00:53:45,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-01 00:53:45,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-01 00:53:45,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-10-01 00:53:45,572 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2018-10-01 00:53:45,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:53:45,573 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-10-01 00:53:45,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-01 00:53:45,573 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-10-01 00:53:45,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-01 00:53:45,573 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:53:45,574 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-10-01 00:53:45,574 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:53:45,574 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:53:45,574 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 53 times [2018-10-01 00:53:45,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:53:45,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:53:45,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:53:45,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:53:45,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:53:45,582 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:53:45,582 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:53:45,582 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 (exit command is (exit), workingDir is null) [2018-10-01 00:53:45,602 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:53:45,803 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-01 00:53:45,803 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:53:45,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:53:47,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:53:47,785 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:53:47,786 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-10-01 00:53:47,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-01 00:53:47,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-01 00:53:47,786 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:53:47,786 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2018-10-01 00:54:00,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:54:00,915 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-01 00:54:00,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-01 00:54:00,915 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-10-01 00:54:00,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:54:00,916 INFO L225 Difference]: With dead ends: 115 [2018-10-01 00:54:00,916 INFO L226 Difference]: Without dead ends: 113 [2018-10-01 00:54:00,916 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time [2018-10-01 00:54:00,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-01 00:54:00,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-01 00:54:00,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-01 00:54:00,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-10-01 00:54:00,922 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2018-10-01 00:54:00,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:54:00,922 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-10-01 00:54:00,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-01 00:54:00,922 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-10-01 00:54:00,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-01 00:54:00,923 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:54:00,923 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1] [2018-10-01 00:54:00,923 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:54:00,923 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:54:00,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1848336509, now seen corresponding path program 54 times [2018-10-01 00:54:00,924 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:54:00,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:54:00,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:54:00,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:54:00,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:54:00,933 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:54:00,933 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:54:00,933 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:54:00,944 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:54:03,209 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-01 00:54:03,209 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:54:03,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:54:05,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:54:05,479 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:54:05,480 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-10-01 00:54:05,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-01 00:54:05,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-01 00:54:05,480 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:54:05,480 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2018-10-01 00:54:19,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:54:19,098 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-01 00:54:19,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-01 00:54:19,098 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-10-01 00:54:19,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:54:19,099 INFO L225 Difference]: With dead ends: 117 [2018-10-01 00:54:19,099 INFO L226 Difference]: Without dead ends: 115 [2018-10-01 00:54:19,100 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time [2018-10-01 00:54:19,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-01 00:54:19,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-01 00:54:19,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-01 00:54:19,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-10-01 00:54:19,105 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2018-10-01 00:54:19,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:54:19,105 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-10-01 00:54:19,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-01 00:54:19,105 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-10-01 00:54:19,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-01 00:54:19,106 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:54:19,106 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-10-01 00:54:19,106 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:54:19,106 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:54:19,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 55 times [2018-10-01 00:54:19,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:54:19,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:54:19,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:54:19,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:54:19,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:54:19,114 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:54:19,114 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:54:19,115 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:54:19,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:54:19,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:54:19,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:54:21,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:54:21,440 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:54:21,441 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-10-01 00:54:21,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-01 00:54:21,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-01 00:54:21,441 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:54:21,441 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2018-10-01 00:54:34,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:54:34,629 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-10-01 00:54:34,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-01 00:54:34,629 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-10-01 00:54:34,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:54:34,630 INFO L225 Difference]: With dead ends: 119 [2018-10-01 00:54:34,630 INFO L226 Difference]: Without dead ends: 117 [2018-10-01 00:54:34,630 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time [2018-10-01 00:54:34,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-01 00:54:34,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-01 00:54:34,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-01 00:54:34,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-10-01 00:54:34,634 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2018-10-01 00:54:34,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:54:34,635 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-10-01 00:54:34,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-01 00:54:34,635 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-10-01 00:54:34,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-01 00:54:34,635 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:54:34,635 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1] [2018-10-01 00:54:34,636 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:54:34,636 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:54:34,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1386202743, now seen corresponding path program 56 times [2018-10-01 00:54:34,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:54:34,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:54:34,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:54:34,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:54:34,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:54:34,644 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:54:34,644 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:54:34,644 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:54:34,660 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:54:34,793 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:54:34,793 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:54:34,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:54:37,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:54:37,088 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:54:37,088 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-10-01 00:54:37,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-01 00:54:37,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-01 00:54:37,088 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:54:37,089 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2018-10-01 00:54:51,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:54:51,110 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-01 00:54:51,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-01 00:54:51,111 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-10-01 00:54:51,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:54:51,112 INFO L225 Difference]: With dead ends: 121 [2018-10-01 00:54:51,112 INFO L226 Difference]: Without dead ends: 119 [2018-10-01 00:54:51,112 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time [2018-10-01 00:54:51,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-01 00:54:51,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-10-01 00:54:51,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-01 00:54:51,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-10-01 00:54:51,118 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2018-10-01 00:54:51,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:54:51,118 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-10-01 00:54:51,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-01 00:54:51,119 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-10-01 00:54:51,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-01 00:54:51,119 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:54:51,119 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-10-01 00:54:51,119 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:54:51,119 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:54:51,119 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 57 times [2018-10-01 00:54:51,120 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:54:51,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:54:51,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:54:51,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:54:51,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:54:51,127 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:54:51,127 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:54:51,127 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:54:51,146 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:54:58,850 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-01 00:54:58,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:54:58,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:55:01,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:55:01,941 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:55:01,942 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-10-01 00:55:01,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-01 00:55:01,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-01 00:55:01,942 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:55:01,942 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2018-10-01 00:55:16,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:55:16,197 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-10-01 00:55:16,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-01 00:55:16,198 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-10-01 00:55:16,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:55:16,199 INFO L225 Difference]: With dead ends: 123 [2018-10-01 00:55:16,199 INFO L226 Difference]: Without dead ends: 121 [2018-10-01 00:55:16,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time [2018-10-01 00:55:16,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-01 00:55:16,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-01 00:55:16,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-01 00:55:16,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-10-01 00:55:16,203 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2018-10-01 00:55:16,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:55:16,204 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-10-01 00:55:16,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-01 00:55:16,204 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-10-01 00:55:16,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-01 00:55:16,204 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:55:16,204 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1] [2018-10-01 00:55:16,204 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:55:16,204 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:55:16,205 INFO L82 PathProgramCache]: Analyzing trace with hash -623488149, now seen corresponding path program 58 times [2018-10-01 00:55:16,205 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:55:16,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:55:16,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:55:16,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:55:16,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:55:16,213 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:55:16,213 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:55:16,213 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:55:16,222 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:55:16,367 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:55:16,367 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:55:16,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:55:18,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:55:18,642 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:55:18,642 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-10-01 00:55:18,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-01 00:55:18,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-01 00:55:18,643 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:55:18,643 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2018-10-01 00:55:34,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:55:34,030 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-10-01 00:55:34,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-01 00:55:34,031 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-10-01 00:55:34,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:55:34,031 INFO L225 Difference]: With dead ends: 125 [2018-10-01 00:55:34,031 INFO L226 Difference]: Without dead ends: 123 [2018-10-01 00:55:34,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time [2018-10-01 00:55:34,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-01 00:55:34,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-10-01 00:55:34,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-01 00:55:34,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-10-01 00:55:34,039 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2018-10-01 00:55:34,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:55:34,039 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-10-01 00:55:34,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-01 00:55:34,039 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-10-01 00:55:34,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-01 00:55:34,039 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:55:34,039 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-10-01 00:55:34,040 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:55:34,040 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:55:34,040 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 59 times [2018-10-01 00:55:34,040 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:55:34,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:55:34,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:55:34,041 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:55:34,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:55:34,048 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:55:34,048 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:55:34,048 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:55:34,065 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:55:34,305 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-10-01 00:55:34,305 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:55:34,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:55:36,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:55:36,873 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:55:36,873 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-10-01 00:55:36,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-01 00:55:36,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-01 00:55:36,874 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:55:36,874 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2018-10-01 00:55:52,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:55:52,170 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-01 00:55:52,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-01 00:55:52,170 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-10-01 00:55:52,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:55:52,171 INFO L225 Difference]: With dead ends: 127 [2018-10-01 00:55:52,171 INFO L226 Difference]: Without dead ends: 125 [2018-10-01 00:55:52,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time [2018-10-01 00:55:52,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-01 00:55:52,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-10-01 00:55:52,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-01 00:55:52,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-10-01 00:55:52,182 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2018-10-01 00:55:52,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:55:52,182 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-10-01 00:55:52,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-01 00:55:52,183 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-10-01 00:55:52,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-01 00:55:52,183 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:55:52,183 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1] [2018-10-01 00:55:52,183 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:55:52,184 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:55:52,184 INFO L82 PathProgramCache]: Analyzing trace with hash 441796191, now seen corresponding path program 60 times [2018-10-01 00:55:52,184 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:55:52,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:55:52,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:55:52,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:55:52,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:55:52,191 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:55:52,191 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:55:52,191 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:55:52,198 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:55:53,746 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-01 00:55:53,747 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:55:53,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:55:56,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:55:56,175 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:55:56,175 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-10-01 00:55:56,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-01 00:55:56,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-01 00:55:56,176 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:55:56,176 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2018-10-01 00:56:12,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:12,234 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-10-01 00:56:12,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-01 00:56:12,234 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2018-10-01 00:56:12,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:12,235 INFO L225 Difference]: With dead ends: 129 [2018-10-01 00:56:12,235 INFO L226 Difference]: Without dead ends: 127 [2018-10-01 00:56:12,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time [2018-10-01 00:56:12,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-01 00:56:12,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-10-01 00:56:12,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-01 00:56:12,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-10-01 00:56:12,242 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2018-10-01 00:56:12,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:12,243 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-10-01 00:56:12,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-01 00:56:12,243 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-10-01 00:56:12,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-01 00:56:12,243 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:12,243 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-10-01 00:56:12,244 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:12,244 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:12,244 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 61 times [2018-10-01 00:56:12,244 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:12,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:12,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:12,244 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:56:12,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:12,252 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:56:12,252 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:56:12,252 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:56:12,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:56:12,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:12,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:56:14,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:14,966 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:56:14,966 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-10-01 00:56:14,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-01 00:56:14,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-01 00:56:14,967 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:14,967 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2018-10-01 00:56:31,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:31,582 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-10-01 00:56:31,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-01 00:56:31,582 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-10-01 00:56:31,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:31,583 INFO L225 Difference]: With dead ends: 131 [2018-10-01 00:56:31,583 INFO L226 Difference]: Without dead ends: 129 [2018-10-01 00:56:31,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time [2018-10-01 00:56:31,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-01 00:56:31,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-10-01 00:56:31,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-01 00:56:31,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-10-01 00:56:31,589 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2018-10-01 00:56:31,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:31,590 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-10-01 00:56:31,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-01 00:56:31,590 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-10-01 00:56:31,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-01 00:56:31,590 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:31,590 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1] [2018-10-01 00:56:31,591 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:31,591 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:31,591 INFO L82 PathProgramCache]: Analyzing trace with hash -897999021, now seen corresponding path program 62 times [2018-10-01 00:56:31,591 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:31,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:31,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:31,592 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:56:31,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:31,599 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:56:31,599 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:56:31,599 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:56:31,619 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:56:31,784 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:56:31,784 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:56:31,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:56:34,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:34,507 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:56:34,508 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-10-01 00:56:34,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-01 00:56:34,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-01 00:56:34,508 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:34,508 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2018-10-01 00:56:51,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:51,500 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-01 00:56:51,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-01 00:56:51,501 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2018-10-01 00:56:51,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:51,502 INFO L225 Difference]: With dead ends: 133 [2018-10-01 00:56:51,502 INFO L226 Difference]: Without dead ends: 131 [2018-10-01 00:56:51,502 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time [2018-10-01 00:56:51,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-01 00:56:51,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-01 00:56:51,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-01 00:56:51,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-10-01 00:56:51,508 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2018-10-01 00:56:51,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:51,508 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-10-01 00:56:51,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-01 00:56:51,508 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-10-01 00:56:51,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-01 00:56:51,509 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:51,509 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-10-01 00:56:51,509 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:51,509 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:51,509 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 63 times [2018-10-01 00:56:51,509 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:51,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:51,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:51,510 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:56:51,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:51,518 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:56:51,518 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:56:51,518 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:56:51,532 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:57:04,065 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-01 00:57:04,065 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:57:04,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:57:06,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:06,714 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:57:06,714 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-10-01 00:57:06,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-01 00:57:06,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-01 00:57:06,715 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:57:06,715 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2018-10-01 00:57:24,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:57:24,288 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-10-01 00:57:24,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-01 00:57:24,288 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-10-01 00:57:24,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:57:24,289 INFO L225 Difference]: With dead ends: 135 [2018-10-01 00:57:24,289 INFO L226 Difference]: Without dead ends: 133 [2018-10-01 00:57:24,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time [2018-10-01 00:57:24,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-01 00:57:24,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-01 00:57:24,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-01 00:57:24,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-10-01 00:57:24,296 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2018-10-01 00:57:24,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:57:24,296 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-10-01 00:57:24,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-01 00:57:24,296 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-10-01 00:57:24,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-01 00:57:24,297 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:57:24,297 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1] [2018-10-01 00:57:24,298 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:57:24,298 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:57:24,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1373610425, now seen corresponding path program 64 times [2018-10-01 00:57:24,301 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:57:24,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:57:24,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:24,302 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:57:24,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:24,309 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:57:24,309 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:57:24,309 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:57:24,321 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:57:24,521 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:57:24,521 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:57:24,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:57:27,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:27,250 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:57:27,250 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-10-01 00:57:27,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-01 00:57:27,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-01 00:57:27,251 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:57:27,251 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2018-10-01 00:57:45,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:57:45,087 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-10-01 00:57:45,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-01 00:57:45,088 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2018-10-01 00:57:45,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:57:45,088 INFO L225 Difference]: With dead ends: 137 [2018-10-01 00:57:45,088 INFO L226 Difference]: Without dead ends: 135 [2018-10-01 00:57:45,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time [2018-10-01 00:57:45,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-01 00:57:45,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-10-01 00:57:45,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-01 00:57:45,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-10-01 00:57:45,095 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2018-10-01 00:57:45,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:57:45,095 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-10-01 00:57:45,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-01 00:57:45,096 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-10-01 00:57:45,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-01 00:57:45,096 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:57:45,096 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-10-01 00:57:45,096 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:57:45,096 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:57:45,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 65 times [2018-10-01 00:57:45,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:57:45,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:57:45,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:45,097 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:57:45,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:45,103 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:57:45,104 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:57:45,104 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:57:45,110 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:57:45,432 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-01 00:57:45,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:57:45,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:57:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:48,265 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:57:48,266 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-10-01 00:57:48,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-01 00:57:48,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-01 00:57:48,266 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:57:48,267 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2018-10-01 00:58:06,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:58:06,978 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-10-01 00:58:06,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-01 00:58:06,978 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-10-01 00:58:06,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:58:06,979 INFO L225 Difference]: With dead ends: 139 [2018-10-01 00:58:06,979 INFO L226 Difference]: Without dead ends: 137 [2018-10-01 00:58:06,979 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time [2018-10-01 00:58:06,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-01 00:58:06,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-10-01 00:58:06,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-01 00:58:06,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-10-01 00:58:06,984 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2018-10-01 00:58:06,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:58:06,984 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-10-01 00:58:06,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-01 00:58:06,985 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-10-01 00:58:06,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-01 00:58:06,985 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:58:06,985 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1] [2018-10-01 00:58:06,985 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:58:06,986 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:58:06,986 INFO L82 PathProgramCache]: Analyzing trace with hash -777616581, now seen corresponding path program 66 times [2018-10-01 00:58:06,986 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:58:06,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:58:06,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:06,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:58:06,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:06,992 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:58:06,993 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:58:06,993 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:58:07,003 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:58:08,349 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-01 00:58:08,350 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:58:08,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:58:11,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:11,455 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:58:11,456 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-10-01 00:58:11,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-01 00:58:11,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-01 00:58:11,456 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:58:11,457 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2018-10-01 00:58:30,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:58:30,945 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-10-01 00:58:30,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-01 00:58:30,945 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2018-10-01 00:58:30,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:58:30,946 INFO L225 Difference]: With dead ends: 141 [2018-10-01 00:58:30,946 INFO L226 Difference]: Without dead ends: 139 [2018-10-01 00:58:30,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time [2018-10-01 00:58:30,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-01 00:58:30,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-10-01 00:58:30,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-01 00:58:30,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-10-01 00:58:30,952 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2018-10-01 00:58:30,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:58:30,953 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-10-01 00:58:30,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-01 00:58:30,953 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-10-01 00:58:30,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-01 00:58:30,953 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:58:30,953 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-10-01 00:58:30,954 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:58:30,954 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:58:30,954 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 67 times [2018-10-01 00:58:30,954 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:58:30,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:58:30,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:30,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:58:30,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:30,961 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:58:30,962 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:58:30,962 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:58:30,975 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:58:31,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:58:31,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:58:34,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:34,178 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:58:34,178 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-10-01 00:58:34,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-01 00:58:34,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-01 00:58:34,179 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:58:34,179 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2018-10-01 00:58:53,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:58:53,787 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-10-01 00:58:53,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-01 00:58:53,788 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-10-01 00:58:53,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:58:53,789 INFO L225 Difference]: With dead ends: 143 [2018-10-01 00:58:53,789 INFO L226 Difference]: Without dead ends: 141 [2018-10-01 00:58:53,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time [2018-10-01 00:58:53,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-01 00:58:53,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-01 00:58:53,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-01 00:58:53,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-10-01 00:58:53,794 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2018-10-01 00:58:53,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:58:53,794 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-10-01 00:58:53,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-01 00:58:53,794 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-10-01 00:58:53,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-01 00:58:53,795 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:58:53,795 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1] [2018-10-01 00:58:53,795 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:58:53,795 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:58:53,795 INFO L82 PathProgramCache]: Analyzing trace with hash -890696145, now seen corresponding path program 68 times [2018-10-01 00:58:53,795 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:58:53,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:58:53,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:53,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:58:53,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:53,803 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:58:53,803 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:58:53,803 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:58:53,811 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:58:54,032 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:58:54,032 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:58:54,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:58:57,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:57,262 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:58:57,262 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-10-01 00:58:57,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-01 00:58:57,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-01 00:58:57,263 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:58:57,263 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2018-10-01 00:59:17,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:59:17,262 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-01 00:59:17,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-01 00:59:17,262 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2018-10-01 00:59:17,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:59:17,263 INFO L225 Difference]: With dead ends: 145 [2018-10-01 00:59:17,263 INFO L226 Difference]: Without dead ends: 143 [2018-10-01 00:59:17,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time [2018-10-01 00:59:17,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-01 00:59:17,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-10-01 00:59:17,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-01 00:59:17,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-10-01 00:59:17,268 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2018-10-01 00:59:17,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:59:17,268 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-10-01 00:59:17,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-01 00:59:17,269 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-10-01 00:59:17,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-01 00:59:17,269 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:59:17,269 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-10-01 00:59:17,270 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:59:17,270 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:59:17,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 69 times [2018-10-01 00:59:17,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:59:17,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:59:17,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:17,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:59:17,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:17,281 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:59:17,281 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:59:17,282 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:59:17,291 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:59:37,240 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-01 00:59:37,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:59:37,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:59:40,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:40,431 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:59:40,431 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2018-10-01 00:59:40,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-01 00:59:40,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-01 00:59:40,432 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:59:40,432 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2018-10-01 01:00:01,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:00:01,626 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-10-01 01:00:01,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-01 01:00:01,626 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-10-01 01:00:01,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:00:01,628 INFO L225 Difference]: With dead ends: 147 [2018-10-01 01:00:01,628 INFO L226 Difference]: Without dead ends: 145 [2018-10-01 01:00:01,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time [2018-10-01 01:00:01,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-10-01 01:00:01,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-10-01 01:00:01,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-01 01:00:01,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-10-01 01:00:01,634 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2018-10-01 01:00:01,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:00:01,634 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-10-01 01:00:01,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-01 01:00:01,635 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-10-01 01:00:01,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-01 01:00:01,635 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:00:01,635 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1] [2018-10-01 01:00:01,635 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:00:01,636 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:00:01,636 INFO L82 PathProgramCache]: Analyzing trace with hash -112918749, now seen corresponding path program 70 times [2018-10-01 01:00:01,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:00:01,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:00:01,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:01,637 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:00:01,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:01,644 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 01:00:01,644 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 01:00:01,644 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 01:00:01,652 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:00:01,903 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:00:01,903 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:00:01,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:00:05,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:05,359 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 01:00:05,359 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-10-01 01:00:05,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-01 01:00:05,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-01 01:00:05,360 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:00:05,360 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2018-10-01 01:00:26,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:00:26,845 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-10-01 01:00:26,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-01 01:00:26,845 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2018-10-01 01:00:26,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:00:26,846 INFO L225 Difference]: With dead ends: 149 [2018-10-01 01:00:26,846 INFO L226 Difference]: Without dead ends: 147 [2018-10-01 01:00:26,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s Time [2018-10-01 01:00:26,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-01 01:00:26,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-10-01 01:00:26,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-01 01:00:26,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-10-01 01:00:26,853 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2018-10-01 01:00:26,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:00:26,854 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-10-01 01:00:26,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-01 01:00:26,854 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-10-01 01:00:26,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-01 01:00:26,854 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:00:26,854 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-10-01 01:00:26,855 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:00:26,855 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:00:26,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 71 times [2018-10-01 01:00:26,855 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:00:26,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:00:26,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:26,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:00:26,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:26,861 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 01:00:26,861 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 01:00:26,861 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 01:00:26,874 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:00:27,260 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-10-01 01:00:27,260 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:00:27,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:00:30,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:30,823 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 01:00:30,823 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2018-10-01 01:00:30,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-01 01:00:30,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-01 01:00:30,824 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:00:30,824 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2018-10-01 01:00:52,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:00:52,871 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-10-01 01:00:52,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-01 01:00:52,872 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-10-01 01:00:52,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:00:52,873 INFO L225 Difference]: With dead ends: 151 [2018-10-01 01:00:52,873 INFO L226 Difference]: Without dead ends: 149 [2018-10-01 01:00:52,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s Time [2018-10-01 01:00:52,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-01 01:00:52,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-10-01 01:00:52,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-01 01:00:52,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-10-01 01:00:52,881 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2018-10-01 01:00:52,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:00:52,882 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-10-01 01:00:52,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-01 01:00:52,882 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-10-01 01:00:52,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-01 01:00:52,883 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:00:52,883 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1] [2018-10-01 01:00:52,883 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:00:52,883 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:00:52,883 INFO L82 PathProgramCache]: Analyzing trace with hash -979937769, now seen corresponding path program 72 times [2018-10-01 01:00:52,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:00:52,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:00:52,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:52,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:00:52,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:52,895 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 01:00:52,896 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 01:00:52,896 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 01:00:52,902 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:00:55,967 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-10-01 01:00:55,967 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:00:55,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:00:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:59,616 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 01:00:59,616 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-10-01 01:00:59,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-01 01:00:59,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-01 01:00:59,617 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:00:59,617 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2018-10-01 01:01:22,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:01:22,702 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-10-01 01:01:22,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-01 01:01:22,702 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2018-10-01 01:01:22,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:01:22,703 INFO L225 Difference]: With dead ends: 153 [2018-10-01 01:01:22,703 INFO L226 Difference]: Without dead ends: 151 [2018-10-01 01:01:22,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s Time [2018-10-01 01:01:22,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-01 01:01:22,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-10-01 01:01:22,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-01 01:01:22,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-10-01 01:01:22,712 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2018-10-01 01:01:22,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:01:22,712 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-10-01 01:01:22,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-01 01:01:22,713 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-10-01 01:01:22,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-01 01:01:22,713 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:01:22,713 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-10-01 01:01:22,714 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:01:22,714 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:01:22,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 73 times [2018-10-01 01:01:22,714 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:01:22,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:01:22,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:22,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:01:22,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:22,723 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 01:01:22,723 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 01:01:22,723 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 01:01:22,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:01:22,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:01:23,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:01:27,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:27,105 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 01:01:27,105 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2018-10-01 01:01:27,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-01 01:01:27,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-01 01:01:27,106 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:01:27,106 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2018-10-01 01:01:51,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:01:51,836 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-10-01 01:01:51,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-01 01:01:51,837 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-10-01 01:01:51,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:01:51,838 INFO L225 Difference]: With dead ends: 155 [2018-10-01 01:01:51,838 INFO L226 Difference]: Without dead ends: 153 [2018-10-01 01:01:51,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s Time [2018-10-01 01:01:51,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-01 01:01:51,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-10-01 01:01:51,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-01 01:01:51,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-10-01 01:01:51,846 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2018-10-01 01:01:51,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:01:51,847 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-10-01 01:01:51,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-01 01:01:51,847 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-10-01 01:01:51,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-01 01:01:51,848 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:01:51,848 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1] [2018-10-01 01:01:51,848 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:01:51,848 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:01:51,848 INFO L82 PathProgramCache]: Analyzing trace with hash -499313909, now seen corresponding path program 74 times [2018-10-01 01:01:51,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:01:51,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:01:51,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:51,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:01:51,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:51,856 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 01:01:51,856 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 01:01:51,856 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 01:01:51,864 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:01:52,133 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:01:52,134 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:01:52,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:01:55,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:55,997 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 01:01:55,997 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-10-01 01:01:55,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-01 01:01:55,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-01 01:01:55,998 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:01:55,998 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. Received shutdown request... [2018-10-01 01:02:02,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-01 01:02:02,910 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-01 01:02:02,917 WARN L206 ceAbstractionStarter]: Timeout [2018-10-01 01:02:02,917 INFO L202 PluginConnector]: Adding new model gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.10 01:02:02 BoogieIcfgContainer [2018-10-01 01:02:02,917 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-01 01:02:02,918 INFO L168 Benchmark]: Toolchain (without parser) took 795136.82 ms. Allocated memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: -513.3 MB). Free memory was 1.5 GB in the beginning and 935.0 MB in the end (delta: 519.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 7.1 GB. [2018-10-01 01:02:02,920 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 01:02:02,920 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.73 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 01:02:02,921 INFO L168 Benchmark]: Boogie Preprocessor took 19.96 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 01:02:02,921 INFO L168 Benchmark]: RCFGBuilder took 224.62 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-01 01:02:02,922 INFO L168 Benchmark]: TraceAbstraction took 794848.45 ms. Allocated memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: -513.3 MB). Free memory was 1.4 GB in the beginning and 935.0 MB in the end (delta: 498.5 MB). There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 01:02:02,925 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 0.25 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 37.73 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 19.96 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 224.62 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 794848.45 ms. Allocated memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: -513.3 MB). Free memory was 1.4 GB in the beginning and 935.0 MB in the end (delta: 498.5 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 45). Cancelled while BasicCegarLoop was constructing difference of abstraction (153states) and FLOYD_HOARE automaton (currently 28 states, 77 states before enhancement), while ReachableStatesComputation was computing reachable states (51 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 794.7s OverallTime, 75 OverallIterations, 75 TraceHistogramMax, 612.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3023 SDtfs, 0 SDslu, 139676 SDs, 0 SdLazy, 145324 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 251.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5775 GetRequests, 2925 SyntacticMatches, 0 SemanticMatches, 2850 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 107.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=153occurred in iteration=74, 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, 74 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 66.4s SatisfiabilityAnalysisTime, 110.7s InterpolantComputationTime, 5850 NumberOfCodeBlocks, 5850 NumberOfCodeBlocksAsserted, 1456 NumberOfCheckSat, 5775 ConstructedInterpolants, 0 QuantifiedInterpolants, 4100813 SizeOfPredicates, 372 NumberOfNonLiveVariables, 18075 ConjunctsInSsa, 11917 ConjunctsInUnsatCore, 75 InterpolantComputations, 1 PerfectInterpolantSequences, 0/140600 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/gauss_sum.i_3.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-01_01-02-02-935.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/gauss_sum.i_3.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-01_01-02-02-935.csv Completed graceful shutdown