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 [2018-09-30 20:42:45,625 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 20:42:45,628 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 20:42:45,640 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 20:42:45,640 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 20:42:45,641 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 20:42:45,642 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 20:42:45,646 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 20:42:45,647 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 20:42:45,649 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 20:42:45,651 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 20:42:45,673 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-09-30 20:42:45,688 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 20:42:45,689 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 20:42:45,690 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 20:42:45,690 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 20:42:45,690 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 20:42:45,691 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 20:42:45,691 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 20:42:45,691 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 20:42:45,691 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 20:42:45,691 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 20:42:45,692 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 20:42:45,692 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 20:42:45,692 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 20:42:45,692 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 20:42:45,692 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 20:42:45,693 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 20:42:45,693 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 20:42:45,693 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 20:42:45,693 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 20:42:45,693 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 20:42:45,694 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 20:42:45,694 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 20:42:45,694 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:42:45,694 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 20:42:45,694 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 20:42:45,694 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 20:42:45,695 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 20:42:45,695 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 20:42:45,695 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 20:42:45,695 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 20:42:45,695 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-30 20:42:45,737 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 20:42:45,753 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 20:42:45,759 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 20:42:45,761 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 20:42:45,761 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 20:42:45,762 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/gauss_sum.i_3.bpl [2018-09-30 20:42:45,763 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/gauss_sum.i_3.bpl' [2018-09-30 20:42:45,815 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 20:42:45,818 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 20:42:45,819 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 20:42:45,819 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 20:42:45,819 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 20:42:45,841 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 30.09 08:42:45" (1/1) ... [2018-09-30 20:42:45,854 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 30.09 08:42:45" (1/1) ... [2018-09-30 20:42:45,861 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 20:42:45,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 20:42:45,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 20:42:45,863 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 20:42:45,875 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 30.09 08:42:45" (1/1) ... [2018-09-30 20:42:45,875 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 30.09 08:42:45" (1/1) ... [2018-09-30 20:42:45,877 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 30.09 08:42:45" (1/1) ... [2018-09-30 20:42:45,878 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 30.09 08:42:45" (1/1) ... [2018-09-30 20:42:45,881 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 30.09 08:42:45" (1/1) ... [2018-09-30 20:42:45,883 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 30.09 08:42:45" (1/1) ... [2018-09-30 20:42:45,886 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 30.09 08:42:45" (1/1) ... [2018-09-30 20:42:45,887 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 20:42:45,888 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 20:42:45,888 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 20:42:45,889 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 20:42:45,890 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:42:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:42:45,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 20:42:45,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 20:42:46,204 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 20:42:46,204 INFO L202 PluginConnector]: Adding new model gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:42:46 BoogieIcfgContainer [2018-09-30 20:42:46,204 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 20:42:46,206 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 20:42:46,206 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 20:42:46,209 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 20:42:46,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:42:45" (1/2) ... [2018-09-30 20:42:46,211 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 30.09 08:42:46, skipping insertion in model container [2018-09-30 20:42:46,211 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 30.09 08:42:46" (2/2) ... [2018-09-30 20:42:46,213 INFO L112 eAbstractionObserver]: Analyzing ICFG gauss_sum.i_3.bpl [2018-09-30 20:42:46,223 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 20:42:46,231 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 20:42:46,279 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 20:42:46,280 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 20:42:46,280 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 20:42:46,281 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 20:42:46,281 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 20:42:46,281 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 20:42:46,281 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 20:42:46,281 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 20:42:46,282 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 20:42:46,297 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-30 20:42:46,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 20:42:46,305 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:46,306 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 20:42:46,307 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:46,319 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:46,319 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-30 20:42:46,321 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:46,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:46,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:46,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:42:46,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:46,398 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:42:46,399 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:42:46,399 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 [2018-09-30 20:42:46,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:42:46,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:46,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:46,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:46,596 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:42:46,596 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 20:42:46,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 20:42:46,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 20:42:46,618 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:46,620 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-30 20:42:46,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:46,756 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-30 20:42:46,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 20:42:46,758 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-30 20:42:46,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:46,772 INFO L225 Difference]: With dead ends: 11 [2018-09-30 20:42:46,773 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 20:42:46,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 20:42:46,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 20:42:46,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 20:42:46,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 20:42:46,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 20:42:46,812 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-30 20:42:46,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:46,813 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 20:42:46,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 20:42:46,813 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 20:42:46,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 20:42:46,813 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:46,813 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-30 20:42:46,814 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:46,814 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:46,814 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-09-30 20:42:46,815 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:46,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:46,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:46,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:42:46,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:46,823 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:42:46,824 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:42:46,824 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 [2018-09-30 20:42:46,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:42:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:46,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:46,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:46,939 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:42:46,939 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-09-30 20:42:46,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 20:42:46,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 20:42:46,941 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:46,941 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-09-30 20:42:47,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:47,124 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 20:42:47,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 20:42:47,125 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-30 20:42:47,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:47,126 INFO L225 Difference]: With dead ends: 11 [2018-09-30 20:42:47,126 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 20:42:47,127 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 20:42:47,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 20:42:47,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 20:42:47,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 20:42:47,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 20:42:47,131 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-30 20:42:47,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:47,132 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 20:42:47,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 20:42:47,132 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 20:42:47,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 20:42:47,133 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:47,133 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-09-30 20:42:47,133 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:47,133 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:47,133 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-09-30 20:42:47,134 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:47,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:47,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:47,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:42:47,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:47,143 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:42:47,143 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:42:47,143 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 [2018-09-30 20:42:47,155 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:42:47,173 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:42:47,174 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:47,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:47,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:47,357 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:42:47,358 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-09-30 20:42:47,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 20:42:47,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 20:42:47,358 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:47,359 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-09-30 20:42:47,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:47,618 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 20:42:47,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:42:47,622 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-30 20:42:47,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:47,623 INFO L225 Difference]: With dead ends: 13 [2018-09-30 20:42:47,623 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 20:42:47,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:42:47,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 20:42:47,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 20:42:47,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 20:42:47,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 20:42:47,628 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-30 20:42:47,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:47,629 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 20:42:47,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 20:42:47,629 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 20:42:47,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:42:47,630 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:47,630 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-30 20:42:47,630 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:47,630 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:47,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-09-30 20:42:47,631 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:47,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:47,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:47,632 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:47,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:47,640 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:42:47,641 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:42:47,641 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:42:47,651 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:42:47,664 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 20:42:47,665 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:47,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:47,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:47,808 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:42:47,808 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-09-30 20:42:47,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 20:42:47,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 20:42:47,809 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:47,809 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-09-30 20:42:48,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:48,073 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 20:42:48,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:42:48,074 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-30 20:42:48,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:48,075 INFO L225 Difference]: With dead ends: 15 [2018-09-30 20:42:48,075 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 20:42:48,076 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:42:48,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 20:42:48,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 20:42:48,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 20:42:48,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 20:42:48,081 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-30 20:42:48,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:48,081 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 20:42:48,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 20:42:48,082 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 20:42:48,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 20:42:48,082 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:48,082 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-09-30 20:42:48,083 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:48,083 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:48,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-09-30 20:42:48,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:48,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:48,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:48,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:48,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:48,093 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:42:48,093 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:42:48,094 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 [2018-09-30 20:42:48,107 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:42:48,148 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:42:48,149 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:48,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:48,382 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:48,421 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:42:48,421 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-09-30 20:42:48,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:42:48,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:42:48,422 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:48,422 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-09-30 20:42:48,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:48,898 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 20:42:48,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:42:48,899 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-30 20:42:48,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:48,901 INFO L225 Difference]: With dead ends: 17 [2018-09-30 20:42:48,901 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 20:42:48,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:42:48,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 20:42:48,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 20:42:48,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 20:42:48,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 20:42:48,906 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-30 20:42:48,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:48,907 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 20:42:48,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:42:48,907 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 20:42:48,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 20:42:48,908 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:48,908 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-09-30 20:42:48,908 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:48,908 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:48,908 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-09-30 20:42:48,909 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:48,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:48,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:48,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:48,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:48,922 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:42:48,922 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:42:48,923 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 [2018-09-30 20:42:48,936 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:42:48,950 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 20:42:48,951 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:48,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:49,066 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:49,088 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:42:49,088 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-09-30 20:42:49,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:42:49,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:42:49,089 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:49,089 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-09-30 20:42:49,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:49,394 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 20:42:49,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:42:49,395 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-30 20:42:49,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:49,396 INFO L225 Difference]: With dead ends: 19 [2018-09-30 20:42:49,396 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 20:42:49,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:42:49,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 20:42:49,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 20:42:49,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 20:42:49,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 20:42:49,402 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-30 20:42:49,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:49,402 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 20:42:49,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:42:49,402 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 20:42:49,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 20:42:49,403 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:49,403 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-09-30 20:42:49,404 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:49,404 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:49,404 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-09-30 20:42:49,404 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:49,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:49,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:49,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:49,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:49,416 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:42:49,416 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:42:49,417 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 [2018-09-30 20:42:49,432 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:42:49,451 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 20:42:49,451 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:49,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:49,646 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:49,666 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:42:49,666 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-09-30 20:42:49,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:42:49,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:42:49,667 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:49,667 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-09-30 20:42:49,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:49,977 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 20:42:49,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:42:49,979 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-30 20:42:49,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:49,980 INFO L225 Difference]: With dead ends: 21 [2018-09-30 20:42:49,980 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 20:42:49,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:42:49,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 20:42:49,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 20:42:49,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 20:42:49,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 20:42:49,987 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-30 20:42:49,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:49,987 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 20:42:49,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:42:49,987 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 20:42:49,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:42:49,988 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:49,988 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-09-30 20:42:49,988 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:49,989 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:49,989 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-09-30 20:42:49,989 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:49,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:49,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:49,990 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:49,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:50,001 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:42:50,001 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:42:50,002 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:42:50,012 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:42:50,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:50,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:50,227 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:42:50,227 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-09-30 20:42:50,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:42:50,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:42:50,228 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:50,228 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-09-30 20:42:50,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:50,787 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 20:42:50,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:42:50,789 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-30 20:42:50,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:50,790 INFO L225 Difference]: With dead ends: 23 [2018-09-30 20:42:50,790 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 20:42:50,790 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:42:50,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 20:42:50,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 20:42:50,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 20:42:50,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 20:42:50,795 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-09-30 20:42:50,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:50,796 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 20:42:50,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:42:50,796 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 20:42:50,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 20:42:50,797 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:50,797 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-09-30 20:42:50,797 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:50,797 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:50,798 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-09-30 20:42:50,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:50,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:50,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:50,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:42:50,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:50,808 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:42:50,808 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:42:50,808 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 [2018-09-30 20:42:50,820 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:42:50,836 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:42:50,836 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:50,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:51,193 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:51,215 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:42:51,215 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-09-30 20:42:51,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:42:51,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:42:51,216 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:51,216 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-09-30 20:42:51,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:51,630 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 20:42:51,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:42:51,631 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-30 20:42:51,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:51,632 INFO L225 Difference]: With dead ends: 25 [2018-09-30 20:42:51,632 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 20:42:51,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:42:51,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 20:42:51,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 20:42:51,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 20:42:51,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 20:42:51,639 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-09-30 20:42:51,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:51,639 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 20:42:51,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:42:51,640 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 20:42:51,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 20:42:51,640 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:51,641 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-09-30 20:42:51,641 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:51,641 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:51,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-09-30 20:42:51,641 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:51,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:51,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:51,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:51,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:51,653 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:42:51,653 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:42:51,653 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:42:51,663 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:42:51,694 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-30 20:42:51,694 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:51,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:51,907 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:51,928 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:42:51,928 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-09-30 20:42:51,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:42:51,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:42:51,929 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:51,929 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-09-30 20:42:52,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:52,465 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 20:42:52,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 20:42:52,466 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-30 20:42:52,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:52,467 INFO L225 Difference]: With dead ends: 27 [2018-09-30 20:42:52,467 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 20:42:52,467 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:42:52,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 20:42:52,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 20:42:52,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 20:42:52,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 20:42:52,473 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-09-30 20:42:52,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:52,473 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 20:42:52,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:42:52,474 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 20:42:52,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 20:42:52,474 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:52,474 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-09-30 20:42:52,474 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:52,475 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:52,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-09-30 20:42:52,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:52,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:52,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:52,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:52,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:52,485 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:42:52,485 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:42:52,485 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 [2018-09-30 20:42:52,497 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:42:52,512 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:42:52,512 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:52,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:52,681 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:52,701 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:42:52,701 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-09-30 20:42:52,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:42:52,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:42:52,702 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:52,702 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-09-30 20:42:53,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:53,421 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 20:42:53,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 20:42:53,421 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-30 20:42:53,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:53,422 INFO L225 Difference]: With dead ends: 29 [2018-09-30 20:42:53,423 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 20:42:53,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:42:53,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 20:42:53,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 20:42:53,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 20:42:53,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 20:42:53,429 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-09-30 20:42:53,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:53,429 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 20:42:53,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:42:53,430 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 20:42:53,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 20:42:53,430 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:53,430 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-09-30 20:42:53,431 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:53,431 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:53,431 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-09-30 20:42:53,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:53,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:53,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:53,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:53,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:53,441 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:42:53,441 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:42:53,441 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 [2018-09-30 20:42:53,456 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:42:53,481 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-30 20:42:53,481 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:53,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:53,876 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:53,897 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:42:53,897 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-09-30 20:42:53,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:42:53,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:42:53,898 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:53,898 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-09-30 20:42:54,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:54,815 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 20:42:54,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 20:42:54,816 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-30 20:42:54,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:54,816 INFO L225 Difference]: With dead ends: 31 [2018-09-30 20:42:54,817 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 20:42:54,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:42:54,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 20:42:54,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 20:42:54,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 20:42:54,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 20:42:54,822 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-09-30 20:42:54,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:54,823 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 20:42:54,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:42:54,823 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 20:42:54,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 20:42:54,823 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:54,824 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-09-30 20:42:54,824 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:54,824 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:54,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-09-30 20:42:54,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:54,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:54,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:54,825 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:54,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:54,836 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:42:54,836 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:42:54,837 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 [2018-09-30 20:42:54,849 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:42:54,877 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 20:42:54,878 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:54,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:55,078 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:55,099 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:42:55,099 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-09-30 20:42:55,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:42:55,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:42:55,099 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:55,100 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-09-30 20:42:56,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:56,203 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 20:42:56,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 20:42:56,203 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-30 20:42:56,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:56,204 INFO L225 Difference]: With dead ends: 33 [2018-09-30 20:42:56,204 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 20:42:56,204 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:42:56,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 20:42:56,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 20:42:56,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 20:42:56,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 20:42:56,210 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-09-30 20:42:56,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:56,210 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 20:42:56,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:42:56,211 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 20:42:56,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 20:42:56,211 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:56,211 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-09-30 20:42:56,212 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:56,212 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:56,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-09-30 20:42:56,212 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:56,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:56,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:56,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:56,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:56,232 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:42:56,232 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:42:56,233 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:42:56,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:42:56,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:56,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:56,544 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:56,565 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:42:56,565 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-09-30 20:42:56,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:42:56,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:42:56,566 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:56,566 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-09-30 20:42:57,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:57,452 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 20:42:57,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 20:42:57,453 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-30 20:42:57,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:57,454 INFO L225 Difference]: With dead ends: 35 [2018-09-30 20:42:57,454 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 20:42:57,454 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:42:57,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 20:42:57,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 20:42:57,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 20:42:57,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 20:42:57,461 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-09-30 20:42:57,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:57,461 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 20:42:57,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:42:57,461 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 20:42:57,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 20:42:57,462 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:57,462 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-09-30 20:42:57,463 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:57,463 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:57,463 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-09-30 20:42:57,463 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:57,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:57,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:57,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:42:57,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:57,486 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:42:57,487 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:42:57,487 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:42:57,513 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:42:57,546 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:42:57,546 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:57,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:58,135 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:58,155 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:42:58,156 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-09-30 20:42:58,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 20:42:58,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 20:42:58,157 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:58,157 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-09-30 20:42:59,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:59,432 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 20:42:59,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 20:42:59,432 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-30 20:42:59,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:59,433 INFO L225 Difference]: With dead ends: 37 [2018-09-30 20:42:59,434 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 20:42:59,434 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:42:59,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 20:42:59,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 20:42:59,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 20:42:59,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 20:42:59,440 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-09-30 20:42:59,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:59,440 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 20:42:59,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 20:42:59,440 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 20:42:59,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 20:42:59,441 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:59,441 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-09-30 20:42:59,441 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:59,442 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:59,442 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-09-30 20:42:59,442 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:59,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:59,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:59,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:59,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:59,452 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:42:59,453 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:42:59,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:42:59,475 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:42:59,540 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-30 20:42:59,540 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:59,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:00,986 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:01,019 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:43:01,019 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-09-30 20:43:01,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 20:43:01,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 20:43:01,020 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:01,020 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-09-30 20:43:02,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:02,166 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 20:43:02,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 20:43:02,172 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-30 20:43:02,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:02,172 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:43:02,172 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 20:43:02,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-09-30 20:43:02,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 20:43:02,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 20:43:02,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 20:43:02,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 20:43:02,182 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-09-30 20:43:02,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:02,183 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 20:43:02,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 20:43:02,183 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 20:43:02,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 20:43:02,184 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:02,184 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-09-30 20:43:02,184 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:02,185 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:02,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-09-30 20:43:02,185 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:02,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:02,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:02,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:02,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:02,207 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:43:02,208 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:43:02,208 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 [2018-09-30 20:43:02,218 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:43:02,248 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:43:02,249 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:02,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:02,598 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:02,620 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:43:02,620 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-09-30 20:43:02,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 20:43:02,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 20:43:02,621 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:02,621 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-09-30 20:43:03,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:03,978 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 20:43:03,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 20:43:03,985 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-30 20:43:03,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:03,985 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:43:03,985 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:43:03,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:43:03,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:43:03,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 20:43:03,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 20:43:03,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 20:43:03,997 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-09-30 20:43:03,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:03,998 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 20:43:03,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 20:43:03,998 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 20:43:03,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 20:43:03,999 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:03,999 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-09-30 20:43:03,999 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:03,999 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:03,999 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-09-30 20:43:03,999 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:04,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:04,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:04,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:04,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:04,017 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:43:04,018 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:43:04,018 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:43:04,027 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:43:04,062 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 20:43:04,062 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:04,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:04,599 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:04,620 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:43:04,620 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-09-30 20:43:04,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 20:43:04,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 20:43:04,621 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:04,621 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-09-30 20:43:06,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:06,169 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 20:43:06,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 20:43:06,171 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-30 20:43:06,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:06,172 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:43:06,172 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:43:06,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:43:06,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:43:06,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 20:43:06,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 20:43:06,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 20:43:06,178 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-09-30 20:43:06,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:06,179 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 20:43:06,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 20:43:06,179 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 20:43:06,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 20:43:06,180 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:06,180 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-09-30 20:43:06,180 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:06,180 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:06,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-09-30 20:43:06,180 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:06,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:06,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:06,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:06,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:06,190 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:43:06,190 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:43:06,190 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:43:06,201 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:43:06,261 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 20:43:06,261 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:06,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:06,601 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:06,622 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:43:06,623 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-09-30 20:43:06,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 20:43:06,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 20:43:06,623 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:06,623 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-09-30 20:43:08,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:08,356 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 20:43:08,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 20:43:08,357 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-30 20:43:08,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:08,357 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:43:08,357 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:43:08,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:43:08,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:43:08,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 20:43:08,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 20:43:08,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 20:43:08,362 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-09-30 20:43:08,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:08,362 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 20:43:08,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 20:43:08,362 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 20:43:08,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 20:43:08,363 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:08,363 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-09-30 20:43:08,363 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:08,364 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:08,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-09-30 20:43:08,364 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:08,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:08,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:08,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:08,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:08,372 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:43:08,373 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:43:08,373 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 [2018-09-30 20:43:08,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:43:08,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:08,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:08,818 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:08,838 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:43:08,838 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-09-30 20:43:08,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 20:43:08,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 20:43:08,838 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:08,839 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-09-30 20:43:10,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:10,578 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 20:43:10,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 20:43:10,579 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-30 20:43:10,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:10,580 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:43:10,580 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:43:10,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:43:10,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:43:10,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 20:43:10,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 20:43:10,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 20:43:10,588 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-09-30 20:43:10,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:10,588 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 20:43:10,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 20:43:10,589 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 20:43:10,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 20:43:10,589 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:10,589 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-09-30 20:43:10,590 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:10,590 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:10,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-09-30 20:43:10,590 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:10,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:10,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:10,591 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:43:10,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:10,599 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:43:10,599 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:43:10,599 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:43:10,620 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:43:10,648 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:43:10,648 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:10,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:11,192 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:43:11,192 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-09-30 20:43:11,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 20:43:11,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 20:43:11,193 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:11,193 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-09-30 20:43:13,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:13,063 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 20:43:13,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:43:13,063 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-30 20:43:13,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:13,064 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:43:13,064 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:43:13,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:43:13,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:43:13,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 20:43:13,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 20:43:13,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 20:43:13,070 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-09-30 20:43:13,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:13,070 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 20:43:13,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 20:43:13,070 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 20:43:13,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 20:43:13,071 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:13,071 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-09-30 20:43:13,071 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:13,072 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:13,072 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-09-30 20:43:13,072 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:13,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:13,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:13,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:13,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:13,081 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:43:13,081 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:43:13,081 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:43:13,094 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:43:13,226 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-30 20:43:13,227 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:13,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:13,621 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:13,642 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:43:13,642 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-09-30 20:43:13,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 20:43:13,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 20:43:13,643 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:13,643 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-09-30 20:43:15,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:15,776 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 20:43:15,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 20:43:15,779 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-30 20:43:15,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:15,780 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:43:15,780 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:43:15,780 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:43:15,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:43:15,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 20:43:15,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 20:43:15,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-30 20:43:15,786 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-09-30 20:43:15,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:15,787 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-30 20:43:15,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 20:43:15,787 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-30 20:43:15,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 20:43:15,787 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:15,788 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-09-30 20:43:15,788 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:15,788 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:15,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-09-30 20:43:15,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:15,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:15,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:15,789 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:15,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:15,797 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:43:15,797 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:43:15,797 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:43:15,813 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:43:15,851 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:43:15,852 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:15,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:16,282 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:16,303 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:43:16,304 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-09-30 20:43:16,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 20:43:16,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 20:43:16,304 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:16,304 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-09-30 20:43:18,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:18,382 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 20:43:18,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 20:43:18,382 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-30 20:43:18,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:18,383 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:43:18,384 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:43:18,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:43:18,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:43:18,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 20:43:18,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 20:43:18,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 20:43:18,390 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-09-30 20:43:18,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:18,390 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 20:43:18,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 20:43:18,390 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 20:43:18,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 20:43:18,391 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:18,391 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-09-30 20:43:18,391 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:18,395 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:18,396 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-09-30 20:43:18,396 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:18,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:18,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:18,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:18,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:18,406 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:43:18,406 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:43:18,406 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) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:43:18,416 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:43:18,468 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-30 20:43:18,469 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:18,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:18,960 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:18,982 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:43:18,982 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-09-30 20:43:18,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 20:43:18,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 20:43:18,982 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:18,983 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-09-30 20:43:21,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:21,756 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 20:43:21,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 20:43:21,757 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-30 20:43:21,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:21,758 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:43:21,758 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:43:21,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:43:21,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:43:21,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 20:43:21,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 20:43:21,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-30 20:43:21,763 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-09-30 20:43:21,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:21,763 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-30 20:43:21,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 20:43:21,764 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-30 20:43:21,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 20:43:21,764 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:21,764 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-09-30 20:43:21,764 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:21,764 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:21,764 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-09-30 20:43:21,765 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:21,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:21,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:21,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:21,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:21,772 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:43:21,772 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:43:21,772 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:43:21,789 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:43:21,880 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 20:43:21,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:21,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:22,439 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:22,461 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:43:22,461 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-09-30 20:43:22,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 20:43:22,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 20:43:22,462 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:22,462 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-09-30 20:43:25,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:25,252 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 20:43:25,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 20:43:25,252 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-09-30 20:43:25,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:25,253 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:43:25,253 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 20:43:25,253 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:43:25,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 20:43:25,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 20:43:25,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 20:43:25,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-30 20:43:25,260 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-09-30 20:43:25,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:25,261 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-30 20:43:25,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 20:43:25,261 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-30 20:43:25,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 20:43:25,261 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:25,262 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-09-30 20:43:25,262 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:25,262 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:25,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-09-30 20:43:25,262 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:25,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:25,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:25,263 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:25,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:25,270 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:43:25,271 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:43:25,271 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2018-09-30 20:43:25,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:43:25,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:25,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:25,896 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:25,916 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:43:25,916 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-09-30 20:43:25,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 20:43:25,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 20:43:25,916 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:25,917 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-09-30 20:43:28,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:28,782 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 20:43:28,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 20:43:28,783 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-30 20:43:28,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:28,783 INFO L225 Difference]: With dead ends: 59 [2018-09-30 20:43:28,784 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 20:43:28,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:43:28,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 20:43:28,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 20:43:28,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 20:43:28,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-30 20:43:28,791 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-09-30 20:43:28,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:28,791 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-30 20:43:28,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 20:43:28,791 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-30 20:43:28,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 20:43:28,792 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:28,792 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-09-30 20:43:28,792 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:28,793 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:28,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-09-30 20:43:28,793 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:28,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:28,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:28,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:43:28,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:28,804 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:43:28,804 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:43:28,804 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:43:28,816 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:43:28,867 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:43:28,867 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:28,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:29,440 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:29,460 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:43:29,460 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-09-30 20:43:29,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 20:43:29,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 20:43:29,461 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:29,461 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-09-30 20:43:32,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:32,785 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 20:43:32,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 20:43:32,785 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-30 20:43:32,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:32,786 INFO L225 Difference]: With dead ends: 61 [2018-09-30 20:43:32,786 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 20:43:32,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:43:32,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 20:43:32,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 20:43:32,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 20:43:32,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-30 20:43:32,793 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-09-30 20:43:32,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:32,793 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-30 20:43:32,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 20:43:32,793 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-30 20:43:32,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 20:43:32,794 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:32,794 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-09-30 20:43:32,794 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:32,794 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:32,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-09-30 20:43:32,795 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:32,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:32,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:32,795 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:32,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:32,807 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:43:32,807 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:43:32,807 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:43:32,817 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:43:33,128 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-30 20:43:33,129 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:33,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:33,878 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:43:33,878 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-09-30 20:43:33,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 20:43:33,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 20:43:33,879 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:33,879 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-09-30 20:43:37,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:37,386 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-30 20:43:37,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 20:43:37,387 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-30 20:43:37,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:37,387 INFO L225 Difference]: With dead ends: 63 [2018-09-30 20:43:37,387 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 20:43:37,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:43:37,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 20:43:37,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 20:43:37,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 20:43:37,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-30 20:43:37,393 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-09-30 20:43:37,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:37,393 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-30 20:43:37,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 20:43:37,393 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-30 20:43:37,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 20:43:37,394 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:37,394 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-09-30 20:43:37,394 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:37,394 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:37,394 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-09-30 20:43:37,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:37,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:37,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:37,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:37,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:37,401 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:43:37,401 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:43:37,401 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 [2018-09-30 20:43:37,420 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:43:37,470 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:43:37,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:37,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:38,173 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:43:38,173 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-09-30 20:43:38,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 20:43:38,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 20:43:38,174 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:38,174 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-09-30 20:43:41,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:41,999 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 20:43:41,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 20:43:42,000 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-09-30 20:43:42,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:42,001 INFO L225 Difference]: With dead ends: 65 [2018-09-30 20:43:42,001 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 20:43:42,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:43:42,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 20:43:42,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 20:43:42,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 20:43:42,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-30 20:43:42,006 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-09-30 20:43:42,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:42,007 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-30 20:43:42,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 20:43:42,007 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-30 20:43:42,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 20:43:42,007 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:42,007 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-09-30 20:43:42,008 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:42,008 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:42,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-09-30 20:43:42,008 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:42,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:42,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:42,009 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:42,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:42,016 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:43:42,016 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:43:42,016 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:43:42,030 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:43:42,111 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-30 20:43:42,112 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:42,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:43,720 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:43:43,720 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-09-30 20:43:43,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 20:43:43,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 20:43:43,721 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:43,721 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2018-09-30 20:43:47,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:47,742 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-30 20:43:47,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 20:43:47,742 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-30 20:43:47,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:47,743 INFO L225 Difference]: With dead ends: 67 [2018-09-30 20:43:47,743 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 20:43:47,743 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time [2018-09-30 20:43:47,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 20:43:47,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 20:43:47,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 20:43:47,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-30 20:43:47,748 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-09-30 20:43:47,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:47,748 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-30 20:43:47,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 20:43:47,748 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-30 20:43:47,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 20:43:47,749 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:47,749 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1] [2018-09-30 20:43:47,749 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:47,749 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:47,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1538531309, now seen corresponding path program 30 times [2018-09-30 20:43:47,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:47,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:47,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:47,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:47,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:47,757 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:43:47,758 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:43:47,758 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 [2018-09-30 20:43:47,777 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:43:48,114 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 20:43:48,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:48,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:48,927 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:48,947 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:43:48,947 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-09-30 20:43:48,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 20:43:48,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 20:43:48,948 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:48,948 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2018-09-30 20:43:53,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:53,176 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 20:43:53,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 20:43:53,176 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-09-30 20:43:53,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:53,177 INFO L225 Difference]: With dead ends: 69 [2018-09-30 20:43:53,178 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 20:43:53,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:43:53,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 20:43:53,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 20:43:53,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 20:43:53,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-30 20:43:53,183 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-09-30 20:43:53,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:53,184 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-30 20:43:53,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 20:43:53,184 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-30 20:43:53,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 20:43:53,184 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:53,184 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-09-30 20:43:53,185 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:53,185 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:53,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 31 times [2018-09-30 20:43:53,185 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:53,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:53,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:53,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:53,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:53,192 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:43:53,193 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:43:53,193 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 [2018-09-30 20:43:53,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:43:53,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:53,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:54,175 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:54,195 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:43:54,195 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-09-30 20:43:54,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 20:43:54,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 20:43:54,196 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:54,196 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2018-09-30 20:43:58,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:58,868 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-30 20:43:58,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 20:43:58,869 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-30 20:43:58,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:58,870 INFO L225 Difference]: With dead ends: 71 [2018-09-30 20:43:58,870 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 20:43:58,870 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:43:58,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 20:43:58,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 20:43:58,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 20:43:58,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-30 20:43:58,875 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-09-30 20:43:58,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:58,875 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-30 20:43:58,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 20:43:58,875 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-30 20:43:58,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 20:43:58,876 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:58,876 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1] [2018-09-30 20:43:58,876 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:58,876 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:58,876 INFO L82 PathProgramCache]: Analyzing trace with hash -547078393, now seen corresponding path program 32 times [2018-09-30 20:43:58,876 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:58,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:58,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:58,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:43:58,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:58,882 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:43:58,882 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:43:58,883 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:43:58,892 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:43:58,955 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:43:58,955 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:58,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:59,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:59,833 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:43:59,833 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-09-30 20:43:59,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 20:43:59,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 20:43:59,834 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:59,834 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2018-09-30 20:44:04,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:44:04,808 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-30 20:44:04,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 20:44:04,809 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-09-30 20:44:04,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:44:04,809 INFO L225 Difference]: With dead ends: 73 [2018-09-30 20:44:04,809 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 20:44:04,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:44:04,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 20:44:04,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 20:44:04,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 20:44:04,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-30 20:44:04,814 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-09-30 20:44:04,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:44:04,815 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-30 20:44:04,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 20:44:04,815 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-30 20:44:04,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 20:44:04,815 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:44:04,816 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-09-30 20:44:04,816 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:44:04,816 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:44:04,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 33 times [2018-09-30 20:44:04,816 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:44:04,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:44:04,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:04,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:44:04,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:04,823 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:44:04,823 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:44:04,823 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:44:04,831 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:44:05,523 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-30 20:44:05,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:44:05,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:44:06,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:06,485 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:44:06,486 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-09-30 20:44:06,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 20:44:06,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 20:44:06,486 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:44:06,486 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2018-09-30 20:44:11,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:44:11,706 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-30 20:44:11,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 20:44:11,706 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-30 20:44:11,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:44:11,707 INFO L225 Difference]: With dead ends: 75 [2018-09-30 20:44:11,708 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 20:44:11,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:44:11,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 20:44:11,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 20:44:11,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 20:44:11,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-30 20:44:11,715 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-09-30 20:44:11,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:44:11,715 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-30 20:44:11,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 20:44:11,715 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-30 20:44:11,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 20:44:11,716 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:44:11,716 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1] [2018-09-30 20:44:11,716 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:44:11,716 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:44:11,717 INFO L82 PathProgramCache]: Analyzing trace with hash 143393787, now seen corresponding path program 34 times [2018-09-30 20:44:11,717 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:44:11,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:44:11,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:11,718 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:44:11,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:11,724 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:44:11,724 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:44:11,724 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 [2018-09-30 20:44:11,740 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:44:11,801 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:44:11,801 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:44:11,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:44:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:12,855 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:44:12,855 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-09-30 20:44:12,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 20:44:12,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 20:44:12,855 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:44:12,855 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2018-09-30 20:44:18,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:44:18,560 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-30 20:44:18,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 20:44:18,561 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-09-30 20:44:18,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:44:18,562 INFO L225 Difference]: With dead ends: 77 [2018-09-30 20:44:18,562 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 20:44:18,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:44:18,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 20:44:18,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 20:44:18,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 20:44:18,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-30 20:44:18,567 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-09-30 20:44:18,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:44:18,567 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-30 20:44:18,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 20:44:18,568 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-30 20:44:18,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 20:44:18,568 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:44:18,568 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-09-30 20:44:18,568 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:44:18,568 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:44:18,569 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 35 times [2018-09-30 20:44:18,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:44:18,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:44:18,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:18,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:44:18,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:18,577 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:44:18,577 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:44:18,577 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 [2018-09-30 20:44:18,586 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:44:18,674 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-30 20:44:18,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:44:18,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:44:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:19,694 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:44:19,694 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-09-30 20:44:19,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 20:44:19,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 20:44:19,695 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:44:19,695 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2018-09-30 20:44:25,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:44:25,581 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-30 20:44:25,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 20:44:25,581 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-30 20:44:25,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:44:25,582 INFO L225 Difference]: With dead ends: 79 [2018-09-30 20:44:25,582 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 20:44:25,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:44:25,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 20:44:25,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 20:44:25,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 20:44:25,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-30 20:44:25,587 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-09-30 20:44:25,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:44:25,588 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-30 20:44:25,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 20:44:25,588 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-30 20:44:25,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 20:44:25,588 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:44:25,588 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1] [2018-09-30 20:44:25,588 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:44:25,589 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:44:25,589 INFO L82 PathProgramCache]: Analyzing trace with hash 497037039, now seen corresponding path program 36 times [2018-09-30 20:44:25,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:44:25,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:44:25,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:25,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:44:25,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:25,596 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:44:25,596 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:44:25,596 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:44:25,611 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:44:25,880 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 20:44:25,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:44:25,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:44:27,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:27,120 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:44:27,120 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-09-30 20:44:27,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 20:44:27,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 20:44:27,120 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:44:27,121 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2018-09-30 20:44:33,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:44:33,235 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-30 20:44:33,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 20:44:33,236 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-09-30 20:44:33,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:44:33,236 INFO L225 Difference]: With dead ends: 81 [2018-09-30 20:44:33,237 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 20:44:33,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:44:33,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 20:44:33,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 20:44:33,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 20:44:33,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-30 20:44:33,242 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-09-30 20:44:33,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:44:33,242 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-30 20:44:33,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 20:44:33,243 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-30 20:44:33,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 20:44:33,243 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:44:33,243 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-09-30 20:44:33,243 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:44:33,244 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:44:33,244 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 37 times [2018-09-30 20:44:33,244 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:44:33,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:44:33,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:33,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:44:33,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:33,254 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:44:33,255 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:44:33,255 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:44:33,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:44:33,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:44:33,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:44:34,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:34,985 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:44:34,985 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-09-30 20:44:34,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 20:44:34,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 20:44:34,985 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:44:34,986 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2018-09-30 20:44:41,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:44:41,478 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-30 20:44:41,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 20:44:41,478 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-30 20:44:41,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:44:41,479 INFO L225 Difference]: With dead ends: 83 [2018-09-30 20:44:41,479 INFO L226 Difference]: Without dead ends: 81 [2018-09-30 20:44:41,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time [2018-09-30 20:44:41,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-30 20:44:41,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-30 20:44:41,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 20:44:41,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-30 20:44:41,484 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-09-30 20:44:41,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:44:41,485 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-30 20:44:41,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 20:44:41,485 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-30 20:44:41,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 20:44:41,485 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:44:41,485 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1] [2018-09-30 20:44:41,486 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:44:41,486 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:44:41,486 INFO L82 PathProgramCache]: Analyzing trace with hash -436355101, now seen corresponding path program 38 times [2018-09-30 20:44:41,486 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:44:41,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:44:41,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:41,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:44:41,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:41,493 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:44:41,493 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:44:41,493 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:44:41,505 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:44:41,569 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:44:41,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:44:41,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:44:42,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:42,637 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:44:42,637 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-09-30 20:44:42,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 20:44:42,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 20:44:42,638 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:44:42,638 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2018-09-30 20:44:49,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:44:49,187 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-30 20:44:49,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 20:44:49,187 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-09-30 20:44:49,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:44:49,188 INFO L225 Difference]: With dead ends: 85 [2018-09-30 20:44:49,188 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 20:44:49,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:44:49,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 20:44:49,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 20:44:49,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 20:44:49,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-30 20:44:49,193 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2018-09-30 20:44:49,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:44:49,193 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-30 20:44:49,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 20:44:49,193 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-30 20:44:49,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 20:44:49,194 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:44:49,194 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-09-30 20:44:49,194 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:44:49,194 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:44:49,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 39 times [2018-09-30 20:44:49,194 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:44:49,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:44:49,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:49,195 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:44:49,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:49,201 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:44:49,201 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:44:49,201 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:44:49,213 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:44:50,629 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-30 20:44:50,630 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:44:50,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:44:51,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:51,984 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:44:51,984 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-09-30 20:44:51,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 20:44:51,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 20:44:51,985 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:44:51,985 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2018-09-30 20:44:58,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:44:58,992 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-30 20:44:58,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 20:44:58,992 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-09-30 20:44:58,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:44:58,993 INFO L225 Difference]: With dead ends: 87 [2018-09-30 20:44:58,993 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 20:44:58,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-09-30 20:44:58,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 20:44:58,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 20:44:58,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 20:44:58,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-30 20:44:58,999 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2018-09-30 20:44:58,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:44:58,999 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-30 20:44:58,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 20:44:58,999 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-30 20:44:59,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-30 20:44:59,000 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:44:59,000 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1] [2018-09-30 20:44:59,000 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:44:59,000 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:44:59,000 INFO L82 PathProgramCache]: Analyzing trace with hash 847361751, now seen corresponding path program 40 times [2018-09-30 20:44:59,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:44:59,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:44:59,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:59,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:44:59,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:59,008 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:44:59,008 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:44:59,009 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:44:59,026 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:44:59,127 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:44:59,127 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:44:59,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:45:00,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:45:00,915 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:45:00,916 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-09-30 20:45:00,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 20:45:00,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 20:45:00,916 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:45:00,916 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2018-09-30 20:45:08,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:45:08,582 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-30 20:45:08,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 20:45:08,582 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-09-30 20:45:08,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:45:08,583 INFO L225 Difference]: With dead ends: 89 [2018-09-30 20:45:08,583 INFO L226 Difference]: Without dead ends: 87 [2018-09-30 20:45:08,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time [2018-09-30 20:45:08,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-30 20:45:08,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-30 20:45:08,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-30 20:45:08,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-30 20:45:08,589 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2018-09-30 20:45:08,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:45:08,589 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-30 20:45:08,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 20:45:08,589 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-30 20:45:08,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 20:45:08,590 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:45:08,590 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-09-30 20:45:08,590 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:45:08,590 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:45:08,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 41 times [2018-09-30 20:45:08,591 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:45:08,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:45:08,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:08,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:45:08,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:08,598 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:45:08,599 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:45:08,599 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:45:08,615 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:45:08,724 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-30 20:45:08,724 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:45:08,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:45:10,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:45:10,862 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:45:10,862 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-09-30 20:45:10,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 20:45:10,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 20:45:10,863 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:45:10,863 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2018-09-30 20:45:18,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:45:18,878 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-30 20:45:18,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 20:45:18,879 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-09-30 20:45:18,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:45:18,879 INFO L225 Difference]: With dead ends: 91 [2018-09-30 20:45:18,879 INFO L226 Difference]: Without dead ends: 89 [2018-09-30 20:45:18,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time [2018-09-30 20:45:18,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-30 20:45:18,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-30 20:45:18,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-30 20:45:18,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-30 20:45:18,885 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2018-09-30 20:45:18,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:45:18,885 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-30 20:45:18,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 20:45:18,885 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-30 20:45:18,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-30 20:45:18,886 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:45:18,886 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1] [2018-09-30 20:45:18,886 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:45:18,886 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:45:18,886 INFO L82 PathProgramCache]: Analyzing trace with hash 495522763, now seen corresponding path program 42 times [2018-09-30 20:45:18,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:45:18,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:45:18,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:18,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:45:18,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:18,893 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:45:18,893 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:45:18,893 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 [2018-09-30 20:45:18,906 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:45:19,232 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-30 20:45:19,233 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:45:19,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:45:20,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:45:20,540 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:45:20,540 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-09-30 20:45:20,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 20:45:20,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 20:45:20,541 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:45:20,541 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2018-09-30 20:45:28,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:45:28,652 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-30 20:45:28,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 20:45:28,653 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-09-30 20:45:28,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:45:28,654 INFO L225 Difference]: With dead ends: 93 [2018-09-30 20:45:28,654 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 20:45:28,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-09-30 20:45:28,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 20:45:28,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 20:45:28,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 20:45:28,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-30 20:45:28,660 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2018-09-30 20:45:28,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:45:28,660 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-30 20:45:28,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 20:45:28,660 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-30 20:45:28,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 20:45:28,660 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:45:28,661 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-09-30 20:45:28,661 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:45:28,661 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:45:28,661 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 43 times [2018-09-30 20:45:28,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:45:28,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:45:28,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:28,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:45:28,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:28,668 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:45:28,668 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:45:28,669 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 [2018-09-30 20:45:28,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:45:28,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:45:28,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:45:30,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:45:30,287 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:45:30,287 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-09-30 20:45:30,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 20:45:30,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 20:45:30,288 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:45:30,288 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2018-09-30 20:45:38,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:45:38,879 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-30 20:45:38,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 20:45:38,880 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-09-30 20:45:38,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:45:38,880 INFO L225 Difference]: With dead ends: 95 [2018-09-30 20:45:38,880 INFO L226 Difference]: Without dead ends: 93 [2018-09-30 20:45:38,881 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-09-30 20:45:38,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-30 20:45:38,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-30 20:45:38,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-30 20:45:38,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-30 20:45:38,885 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2018-09-30 20:45:38,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:45:38,885 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-30 20:45:38,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 20:45:38,885 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-30 20:45:38,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 20:45:38,886 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:45:38,886 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1] [2018-09-30 20:45:38,886 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:45:38,886 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:45:38,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1257297599, now seen corresponding path program 44 times [2018-09-30 20:45:38,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:45:38,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:45:38,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:38,887 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:45:38,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:38,893 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:45:38,894 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:45:38,894 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:45:38,901 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:45:38,991 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:45:38,992 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:45:38,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:45:40,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:45:40,423 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:45:40,423 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-09-30 20:45:40,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 20:45:40,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 20:45:40,423 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:45:40,424 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2018-09-30 20:45:49,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:45:49,656 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-30 20:45:49,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 20:45:49,657 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-09-30 20:45:49,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:45:49,657 INFO L225 Difference]: With dead ends: 97 [2018-09-30 20:45:49,658 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 20:45:49,658 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time [2018-09-30 20:45:49,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 20:45:49,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-30 20:45:49,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 20:45:49,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-30 20:45:49,664 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2018-09-30 20:45:49,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:45:49,664 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-30 20:45:49,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 20:45:49,665 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-30 20:45:49,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-30 20:45:49,665 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:45:49,665 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-09-30 20:45:49,665 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:45:49,666 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:45:49,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 45 times [2018-09-30 20:45:49,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:45:49,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:45:49,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:49,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:45:49,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:49,674 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:45:49,675 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:45:49,675 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 [2018-09-30 20:45:49,689 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:45:52,488 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-30 20:45:52,489 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:45:52,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:45:54,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:45:54,113 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:45:54,113 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-09-30 20:45:54,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 20:45:54,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 20:45:54,114 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:45:54,114 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2018-09-30 20:46:03,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:46:03,345 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-30 20:46:03,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 20:46:03,346 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-09-30 20:46:03,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:46:03,347 INFO L225 Difference]: With dead ends: 99 [2018-09-30 20:46:03,347 INFO L226 Difference]: Without dead ends: 97 [2018-09-30 20:46:03,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time [2018-09-30 20:46:03,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-30 20:46:03,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-30 20:46:03,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 20:46:03,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-30 20:46:03,351 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2018-09-30 20:46:03,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:46:03,352 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-30 20:46:03,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 20:46:03,352 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-30 20:46:03,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-30 20:46:03,352 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:46:03,352 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1] [2018-09-30 20:46:03,353 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:46:03,353 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:46:03,353 INFO L82 PathProgramCache]: Analyzing trace with hash 672530355, now seen corresponding path program 46 times [2018-09-30 20:46:03,353 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:46:03,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:46:03,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:46:03,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:46:03,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:46:03,360 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:46:03,360 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:46:03,360 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 [2018-09-30 20:46:03,371 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:46:03,495 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:46:03,495 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:46:03,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:46:05,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:46:05,032 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:46:05,032 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-09-30 20:46:05,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 20:46:05,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 20:46:05,033 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:46:05,033 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2018-09-30 20:46:14,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:46:14,836 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-30 20:46:14,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 20:46:14,837 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-09-30 20:46:14,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:46:14,838 INFO L225 Difference]: With dead ends: 101 [2018-09-30 20:46:14,838 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 20:46:14,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-09-30 20:46:14,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 20:46:14,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-30 20:46:14,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-30 20:46:14,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-30 20:46:14,843 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2018-09-30 20:46:14,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:46:14,844 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-30 20:46:14,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 20:46:14,844 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-30 20:46:14,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 20:46:14,844 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:46:14,844 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-09-30 20:46:14,845 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:46:14,845 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:46:14,845 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 47 times [2018-09-30 20:46:14,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:46:14,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:46:14,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:46:14,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:46:14,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:46:14,851 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:46:14,851 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:46:14,851 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:46:14,859 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:46:15,015 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-30 20:46:15,015 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:46:15,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:46:17,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:46:17,724 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:46:17,724 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-09-30 20:46:17,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 20:46:17,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 20:46:17,724 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:46:17,725 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2018-09-30 20:46:27,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:46:27,696 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-30 20:46:27,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 20:46:27,696 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-09-30 20:46:27,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:46:27,697 INFO L225 Difference]: With dead ends: 103 [2018-09-30 20:46:27,697 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 20:46:27,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time [2018-09-30 20:46:27,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 20:46:27,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 20:46:27,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 20:46:27,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-30 20:46:27,704 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2018-09-30 20:46:27,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:46:27,704 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-30 20:46:27,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 20:46:27,704 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-30 20:46:27,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 20:46:27,705 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:46:27,705 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1] [2018-09-30 20:46:27,705 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:46:27,705 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:46:27,706 INFO L82 PathProgramCache]: Analyzing trace with hash 735415975, now seen corresponding path program 48 times [2018-09-30 20:46:27,706 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:46:27,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:46:27,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:46:27,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:46:27,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:46:27,714 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:46:27,714 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:46:27,714 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 [2018-09-30 20:46:27,729 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:46:29,663 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-30 20:46:29,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:46:29,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:46:31,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:46:31,310 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:46:31,311 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-09-30 20:46:31,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 20:46:31,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 20:46:31,311 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:46:31,311 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2018-09-30 20:46:41,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:46:41,548 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-30 20:46:41,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 20:46:41,549 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-09-30 20:46:41,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:46:41,549 INFO L225 Difference]: With dead ends: 105 [2018-09-30 20:46:41,549 INFO L226 Difference]: Without dead ends: 103 [2018-09-30 20:46:41,550 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time [2018-09-30 20:46:41,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-30 20:46:41,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-30 20:46:41,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-30 20:46:41,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-30 20:46:41,556 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2018-09-30 20:46:41,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:46:41,557 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-30 20:46:41,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 20:46:41,557 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-30 20:46:41,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-30 20:46:41,558 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:46:41,558 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-09-30 20:46:41,558 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:46:41,559 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:46:41,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 49 times [2018-09-30 20:46:41,559 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:46:41,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:46:41,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:46:41,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:46:41,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:46:41,568 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:46:41,568 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:46:41,568 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 [2018-09-30 20:46:41,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:46:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:46:41,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:46:43,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:46:43,352 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:46:43,352 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-09-30 20:46:43,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 20:46:43,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 20:46:43,352 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:46:43,353 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2018-09-30 20:46:54,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:46:54,599 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-30 20:46:54,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 20:46:54,599 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-09-30 20:46:54,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:46:54,600 INFO L225 Difference]: With dead ends: 107 [2018-09-30 20:46:54,600 INFO L226 Difference]: Without dead ends: 105 [2018-09-30 20:46:54,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time [2018-09-30 20:46:54,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-30 20:46:54,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-30 20:46:54,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-30 20:46:54,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-30 20:46:54,607 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2018-09-30 20:46:54,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:46:54,607 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-30 20:46:54,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 20:46:54,608 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-30 20:46:54,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 20:46:54,608 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:46:54,608 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1] [2018-09-30 20:46:54,608 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:46:54,609 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:46:54,609 INFO L82 PathProgramCache]: Analyzing trace with hash 378307483, now seen corresponding path program 50 times [2018-09-30 20:46:54,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:46:54,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:46:54,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:46:54,610 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:46:54,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:46:54,618 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:46:54,618 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:46:54,618 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 [2018-09-30 20:46:54,628 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:46:54,776 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:46:54,777 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:46:54,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:46:57,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:46:57,164 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:46:57,165 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-09-30 20:46:57,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 20:46:57,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 20:46:57,165 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:46:57,165 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. Received shutdown request... [2018-09-30 20:47:00,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 20:47:00,215 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 20:47:00,221 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 20:47:00,222 INFO L202 PluginConnector]: Adding new model gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 08:47:00 BoogieIcfgContainer [2018-09-30 20:47:00,222 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 20:47:00,223 INFO L168 Benchmark]: Toolchain (without parser) took 254407.57 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -33.0 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 168.7 MB). Peak memory consumption was 135.7 MB. Max. memory is 7.1 GB. [2018-09-30 20:47:00,225 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.86 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:47:00,225 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.05 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:47:00,226 INFO L168 Benchmark]: Boogie Preprocessor took 25.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:47:00,226 INFO L168 Benchmark]: RCFGBuilder took 316.53 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 20:47:00,227 INFO L168 Benchmark]: TraceAbstraction took 254016.22 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -33.0 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 147.4 MB). Peak memory consumption was 114.4 MB. Max. memory is 7.1 GB. [2018-09-30 20:47:00,231 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 0.86 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.05 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 25.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 316.53 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 254016.22 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -33.0 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 147.4 MB). Peak memory consumption was 114.4 MB. 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 (105states) and FLOYD_HOARE automaton (currently 18 states, 53 states before enhancement), while ReachableStatesComputation was computing reachable states (31 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 253.9s OverallTime, 51 OverallIterations, 51 TraceHistogramMax, 197.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1441 SDtfs, 0 SDslu, 43676 SDs, 0 SdLazy, 46290 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 79.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2703 GetRequests, 1377 SyntacticMatches, 0 SemanticMatches, 1326 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105occurred in iteration=50, 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: 0.2s AutomataMinimizationTime, 50 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 10.2s SatisfiabilityAnalysisTime, 43.2s InterpolantComputationTime, 2754 NumberOfCodeBlocks, 2754 NumberOfCodeBlocksAsserted, 684 NumberOfCheckSat, 2703 ConstructedInterpolants, 0 QuantifiedInterpolants, 1314497 SizeOfPredicates, 252 NumberOfNonLiveVariables, 8619 ConjunctsInSsa, 5653 ConjunctsInUnsatCore, 51 InterpolantComputations, 1 PerfectInterpolantSequences, 0/44200 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-0-2018-09-30_20-47-00-242.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-0-2018-09-30_20-47-00-242.csv Completed graceful shutdown