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/sum02.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-133090d [2018-10-04 09:47:58,324 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 09:47:58,325 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 09:47:58,341 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 09:47:58,341 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 09:47:58,342 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 09:47:58,343 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 09:47:58,345 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 09:47:58,346 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 09:47:58,347 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 09:47:58,348 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-04 09:47:58,372 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-04 09:47:58,391 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 09:47:58,391 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 09:47:58,392 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 09:47:58,393 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 09:47:58,393 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 09:47:58,393 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 09:47:58,394 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 09:47:58,395 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 09:47:58,395 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 09:47:58,395 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 09:47:58,395 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 09:47:58,395 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 09:47:58,395 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 09:47:58,396 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 09:47:58,396 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 09:47:58,396 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 09:47:58,396 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 09:47:58,396 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 09:47:58,397 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 09:47:58,397 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 09:47:58,398 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 09:47:58,398 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 09:47:58,398 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:47:58,398 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 09:47:58,398 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 09:47:58,399 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 09:47:58,399 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 09:47:58,399 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 09:47:58,399 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 09:47:58,399 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 09:47:58,399 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 09:47:58,464 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 09:47:58,478 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 09:47:58,485 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 09:47:58,487 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 09:47:58,487 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 09:47:58,488 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/sum02.i_3.bpl [2018-10-04 09:47:58,489 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/sum02.i_3.bpl' [2018-10-04 09:47:58,550 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 09:47:58,551 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 09:47:58,552 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 09:47:58,552 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 09:47:58,553 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 09:47:58,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:47:58" (1/1) ... [2018-10-04 09:47:58,589 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:47:58" (1/1) ... [2018-10-04 09:47:58,596 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 09:47:58,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 09:47:58,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 09:47:58,597 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 09:47:58,609 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:47:58" (1/1) ... [2018-10-04 09:47:58,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:47:58" (1/1) ... [2018-10-04 09:47:58,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:47:58" (1/1) ... [2018-10-04 09:47:58,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:47:58" (1/1) ... [2018-10-04 09:47:58,618 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:47:58" (1/1) ... [2018-10-04 09:47:58,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:47:58" (1/1) ... [2018-10-04 09:47:58,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:47:58" (1/1) ... [2018-10-04 09:47:58,623 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 09:47:58,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 09:47:58,624 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 09:47:58,625 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 09:47:58,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:47:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:47:58,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 09:47:58,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 09:47:58,881 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 09:47:58,883 INFO L202 PluginConnector]: Adding new model sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:47:58 BoogieIcfgContainer [2018-10-04 09:47:58,883 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 09:47:58,884 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 09:47:58,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 09:47:58,888 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 09:47:58,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:47:58" (1/2) ... [2018-10-04 09:47:58,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5474b8b4 and model type sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 09:47:58, skipping insertion in model container [2018-10-04 09:47:58,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:47:58" (2/2) ... [2018-10-04 09:47:58,891 INFO L112 eAbstractionObserver]: Analyzing ICFG sum02.i_3.bpl [2018-10-04 09:47:58,901 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 09:47:58,909 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 09:47:58,964 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 09:47:58,965 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 09:47:58,966 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 09:47:58,966 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 09:47:58,966 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 09:47:58,966 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 09:47:58,966 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 09:47:58,967 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 09:47:58,969 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 09:47:58,985 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-04 09:47:58,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 09:47:58,998 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:47:58,999 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-04 09:47:59,000 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:47:59,012 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:47:59,013 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-10-04 09:47:59,016 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:47:59,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:47:59,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:47:59,072 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:47:59,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:47:59,106 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 09:47:59,106 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 09:47:59,106 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 09:47:59,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:47:59,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:47:59,144 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:47:59,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:47:59,319 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:47:59,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 09:47:59,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 09:47:59,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 09:47:59,342 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:47:59,345 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-04 09:47:59,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:47:59,396 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-04 09:47:59,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 09:47:59,402 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-04 09:47:59,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:47:59,418 INFO L225 Difference]: With dead ends: 11 [2018-10-04 09:47:59,418 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 09:47:59,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 1 [2018-10-04 09:47:59,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 09:47:59,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-04 09:47:59,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 09:47:59,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-04 09:47:59,461 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-10-04 09:47:59,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:47:59,461 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-04 09:47:59,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 09:47:59,462 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-04 09:47:59,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 09:47:59,462 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:47:59,462 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-10-04 09:47:59,463 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:47:59,463 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:47:59,463 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-10-04 09:47:59,463 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:47:59,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:47:59,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:47:59,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:47:59,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:47:59,471 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 09:47:59,472 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 09:47:59,472 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 09:47:59,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:47:59,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:47:59,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:47:59,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:47:59,582 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 09:47:59,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-10-04 09:47:59,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 09:47:59,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 09:47:59,585 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:47:59,585 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-10-04 09:47:59,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:47:59,633 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-04 09:47:59,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 09:47:59,634 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-04 09:47:59,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:47:59,634 INFO L225 Difference]: With dead ends: 11 [2018-10-04 09:47:59,635 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 09:47:59,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 2 [2018-10-04 09:47:59,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 09:47:59,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-04 09:47:59,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 09:47:59,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-04 09:47:59,639 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-04 09:47:59,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:47:59,640 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-04 09:47:59,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 09:47:59,640 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-04 09:47:59,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 09:47:59,640 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:47:59,641 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-10-04 09:47:59,641 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:47:59,641 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:47:59,641 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-10-04 09:47:59,642 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:47:59,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:47:59,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:47:59,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:47:59,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:47:59,653 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 09:47:59,653 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 09:47:59,653 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 09:47:59,668 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:47:59,763 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:47:59,763 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:47:59,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:47:59,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:47:59,943 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 09:47:59,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-10-04 09:47:59,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 09:47:59,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 09:47:59,944 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:47:59,944 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-10-04 09:48:00,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:48:00,062 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-04 09:48:00,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 09:48:00,063 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-04 09:48:00,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:48:00,064 INFO L225 Difference]: With dead ends: 13 [2018-10-04 09:48:00,064 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 09:48:00,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 3 [2018-10-04 09:48:00,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 09:48:00,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 09:48:00,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 09:48:00,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-04 09:48:00,070 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-10-04 09:48:00,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:48:00,070 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-04 09:48:00,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 09:48:00,071 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-04 09:48:00,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 09:48:00,071 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:48:00,071 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-10-04 09:48:00,072 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:48:00,072 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:48:00,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-10-04 09:48:00,072 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:48:00,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:48:00,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:48:00,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:48:00,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:48:00,088 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 09:48:00,088 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 09:48:00,088 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 09:48:00,105 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:49:41,754 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 09:49:41,754 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:49:41,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:49:41,938 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:41,960 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 09:49:41,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-10-04 09:49:41,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 09:49:41,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 09:49:41,961 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:49:41,961 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-10-04 09:49:42,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:49:42,113 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-04 09:49:42,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 09:49:42,114 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-04 09:49:42,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:49:42,115 INFO L225 Difference]: With dead ends: 15 [2018-10-04 09:49:42,115 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 09:49:42,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 4 [2018-10-04 09:49:42,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 09:49:42,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 09:49:42,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 09:49:42,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-04 09:49:42,121 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-10-04 09:49:42,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:49:42,121 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-04 09:49:42,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 09:49:42,122 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-04 09:49:42,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 09:49:42,122 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:49:42,123 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-10-04 09:49:42,123 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:49:42,123 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:49:42,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-10-04 09:49:42,124 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:49:42,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:49:42,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:42,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:49:42,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:42,146 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 09:49:42,147 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 09:49:42,149 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 09:49:42,162 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:49:42,649 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:49:42,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:49:42,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:49:42,774 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:42,806 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 09:49:42,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-10-04 09:49:42,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 09:49:42,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 09:49:42,807 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:49:42,808 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-10-04 09:49:42,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:49:42,955 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-04 09:49:42,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:49:42,956 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-04 09:49:42,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:49:42,956 INFO L225 Difference]: With dead ends: 17 [2018-10-04 09:49:42,956 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 09:49:42,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 5 [2018-10-04 09:49:42,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 09:49:42,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-04 09:49:42,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 09:49:42,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-04 09:49:42,962 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-10-04 09:49:42,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:49:42,962 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-04 09:49:42,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 09:49:42,963 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-04 09:49:42,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 09:49:42,963 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:49:42,963 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-10-04 09:49:42,964 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:49:42,964 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:49:42,964 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-10-04 09:49:42,964 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:49:42,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:49:42,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:42,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:49:42,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:42,976 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 09:49:42,977 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 09:49:42,977 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 09:49:42,989 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:49:57,807 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 09:49:57,808 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:49:57,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:49:57,989 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:58,014 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 09:49:58,014 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-10-04 09:49:58,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:49:58,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:49:58,015 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:49:58,015 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-10-04 09:49:58,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:49:58,181 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-04 09:49:58,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:49:58,183 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-04 09:49:58,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:49:58,184 INFO L225 Difference]: With dead ends: 19 [2018-10-04 09:49:58,184 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 09:49:58,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 6 [2018-10-04 09:49:58,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 09:49:58,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-04 09:49:58,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 09:49:58,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-04 09:49:58,190 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-10-04 09:49:58,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:49:58,191 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-04 09:49:58,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:49:58,191 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-04 09:49:58,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 09:49:58,192 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:49:58,192 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-10-04 09:49:58,192 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:49:58,192 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:49:58,193 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-10-04 09:49:58,193 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:49:58,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:49:58,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:58,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:49:58,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:58,206 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 09:49:58,207 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 09:49:58,207 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 09:49:58,220 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:50:02,600 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 09:50:02,600 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:50:02,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:02,770 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:50:02,797 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 09:50:02,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-10-04 09:50:02,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:50:02,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:50:02,798 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:02,798 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-10-04 09:50:03,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:03,006 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-04 09:50:03,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:50:03,007 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-04 09:50:03,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:03,008 INFO L225 Difference]: With dead ends: 21 [2018-10-04 09:50:03,008 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 09:50:03,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 7 [2018-10-04 09:50:03,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 09:50:03,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 09:50:03,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 09:50:03,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-04 09:50:03,014 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-10-04 09:50:03,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:03,014 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-04 09:50:03,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:50:03,015 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-04 09:50:03,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 09:50:03,015 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:03,016 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-10-04 09:50:03,016 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:03,016 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:03,016 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-10-04 09:50:03,016 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:03,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:03,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:03,017 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:50:03,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:03,032 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 09:50:03,032 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 09:50:03,032 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 09:50:03,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:50:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:03,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:03,879 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:50:03,902 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 09:50:03,902 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-10-04 09:50:03,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:50:03,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:50:03,903 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:03,903 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-10-04 09:50:04,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:04,634 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-04 09:50:04,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:50:04,635 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-04 09:50:04,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:04,636 INFO L225 Difference]: With dead ends: 23 [2018-10-04 09:50:04,636 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 09:50:04,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 8 [2018-10-04 09:50:04,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 09:50:04,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 09:50:04,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 09:50:04,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-04 09:50:04,642 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-10-04 09:50:04,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:04,642 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-04 09:50:04,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:50:04,643 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-04 09:50:04,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 09:50:04,643 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:04,643 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-10-04 09:50:04,644 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:04,644 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:04,644 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-10-04 09:50:04,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:04,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:04,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:04,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:50:04,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:04,659 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 09:50:04,659 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 09:50:04,659 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 09:50:04,673 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:50:27,650 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:50:27,651 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:50:27,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:50:28,191 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 09:50:28,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-10-04 09:50:28,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:50:28,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:50:28,192 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:28,193 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-10-04 09:50:28,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:28,352 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-04 09:50:28,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:50:28,355 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-04 09:50:28,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:28,356 INFO L225 Difference]: With dead ends: 25 [2018-10-04 09:50:28,357 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 09:50:28,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 9 [2018-10-04 09:50:28,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 09:50:28,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 09:50:28,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 09:50:28,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-04 09:50:28,364 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-10-04 09:50:28,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:28,365 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-04 09:50:28,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:50:28,365 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-04 09:50:28,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 09:50:28,366 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:28,366 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-10-04 09:50:28,366 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:28,366 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:28,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-10-04 09:50:28,367 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:28,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:28,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:28,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:50:28,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:28,386 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 09:50:28,386 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 09:50:28,386 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 09:50:28,394 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown