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 0.1.23-1cc990c [2018-09-30 20:47:38,346 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 20:47:38,348 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 20:47:38,359 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 20:47:38,360 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 20:47:38,361 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 20:47:38,362 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 20:47:38,364 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 20:47:38,365 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 20:47:38,366 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 20:47:38,367 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 20:47:38,391 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 20:47:38,418 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 20:47:38,419 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 20:47:38,420 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 20:47:38,420 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 20:47:38,420 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 20:47:38,421 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 20:47:38,421 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 20:47:38,421 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 20:47:38,421 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 20:47:38,424 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 20:47:38,424 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 20:47:38,424 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 20:47:38,424 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 20:47:38,425 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 20:47:38,425 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 20:47:38,425 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 20:47:38,425 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 20:47:38,426 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 20:47:38,426 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 20:47:38,426 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 20:47:38,426 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 20:47:38,427 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 20:47:38,427 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:47:38,427 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 20:47:38,427 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 20:47:38,427 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 20:47:38,428 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 20:47:38,428 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 20:47:38,428 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 20:47:38,428 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 20:47:38,428 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-30 20:47:38,481 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 20:47:38,493 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 20:47:38,497 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 20:47:38,498 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 20:47:38,499 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 20:47:38,500 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/sum02.i_3.bpl [2018-09-30 20:47:38,500 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/sum02.i_3.bpl' [2018-09-30 20:47:38,548 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 20:47:38,551 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 20:47:38,552 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 20:47:38,552 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 20:47:38,552 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 20:47:38,574 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 30.09 08:47:38" (1/1) ... [2018-09-30 20:47:38,587 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 30.09 08:47:38" (1/1) ... [2018-09-30 20:47:38,595 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 20:47:38,596 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 20:47:38,596 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 20:47:38,596 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 20:47:38,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:47:38" (1/1) ... [2018-09-30 20:47:38,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:47:38" (1/1) ... [2018-09-30 20:47:38,609 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:47:38" (1/1) ... [2018-09-30 20:47:38,609 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:47:38" (1/1) ... [2018-09-30 20:47:38,614 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:47:38" (1/1) ... [2018-09-30 20:47:38,617 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:47:38" (1/1) ... [2018-09-30 20:47:38,618 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:47:38" (1/1) ... [2018-09-30 20:47:38,625 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 20:47:38,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 20:47:38,626 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 20:47:38,626 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 20:47:38,627 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:47:38" (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 20:47:38,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 20:47:38,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 20:47:38,930 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 20:47:38,931 INFO L202 PluginConnector]: Adding new model sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:47:38 BoogieIcfgContainer [2018-09-30 20:47:38,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 20:47:38,932 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 20:47:38,932 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 20:47:38,936 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 20:47:38,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:47:38" (1/2) ... [2018-09-30 20:47:38,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12a16f1 and model type sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 08:47:38, skipping insertion in model container [2018-09-30 20:47:38,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:47:38" (2/2) ... [2018-09-30 20:47:38,946 INFO L112 eAbstractionObserver]: Analyzing ICFG sum02.i_3.bpl [2018-09-30 20:47:38,955 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 20:47:38,964 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 20:47:39,024 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 20:47:39,025 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 20:47:39,026 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 20:47:39,026 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 20:47:39,026 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 20:47:39,026 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 20:47:39,026 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 20:47:39,027 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 20:47:39,027 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 20:47:39,045 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-30 20:47:39,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 20:47:39,052 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:47:39,053 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 20:47:39,054 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:47:39,062 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:47:39,063 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-30 20:47:39,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:47:39,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:47:39,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:47:39,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:47:39,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:47:39,144 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:47:39,144 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:47:39,144 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 20:47:39,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:47:39,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:47:39,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:47:39,248 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 20:47:39,270 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:47:39,271 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 20:47:39,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 20:47:39,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 20:47:39,287 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:47:39,289 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-30 20:47:39,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:47:39,472 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-30 20:47:39,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 20:47:39,474 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-30 20:47:39,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:47:39,486 INFO L225 Difference]: With dead ends: 11 [2018-09-30 20:47:39,486 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 20:47:39,489 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 20:47:39,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 20:47:39,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 20:47:39,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 20:47:39,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 20:47:39,534 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-30 20:47:39,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:47:39,535 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 20:47:39,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 20:47:39,535 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 20:47:39,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 20:47:39,535 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:47:39,536 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-30 20:47:39,536 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:47:39,536 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:47:39,536 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-09-30 20:47:39,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:47:39,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:47:39,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:47:39,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:47:39,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:47:39,545 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:47:39,545 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:47:39,545 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 20:47:39,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:47:39,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:47:39,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:47:39,617 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 20:47:39,637 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:47:39,638 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-09-30 20:47:39,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 20:47:39,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 20:47:39,640 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:47:39,640 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-09-30 20:47:39,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:47:39,755 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 20:47:39,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 20:47:39,756 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-30 20:47:39,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:47:39,757 INFO L225 Difference]: With dead ends: 11 [2018-09-30 20:47:39,757 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 20:47:39,758 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 20:47:39,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 20:47:39,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 20:47:39,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 20:47:39,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 20:47:39,761 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-30 20:47:39,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:47:39,762 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 20:47:39,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 20:47:39,762 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 20:47:39,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 20:47:39,763 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:47:39,763 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-09-30 20:47:39,763 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:47:39,763 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:47:39,764 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-09-30 20:47:39,764 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:47:39,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:47:39,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:47:39,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:47:39,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:47:39,784 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:47:39,784 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:47:39,784 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:47:39,798 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:47:39,893 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:47:39,893 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:47:39,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:47:40,079 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 20:47:40,111 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:47:40,111 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-09-30 20:47:40,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 20:47:40,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 20:47:40,112 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:47:40,112 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-09-30 20:47:40,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:47:40,487 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 20:47:40,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:47:40,488 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-30 20:47:40,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:47:40,489 INFO L225 Difference]: With dead ends: 13 [2018-09-30 20:47:40,489 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 20:47:40,489 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 20:47:40,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 20:47:40,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 20:47:40,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 20:47:40,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 20:47:40,494 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-30 20:47:40,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:47:40,494 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 20:47:40,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 20:47:40,495 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 20:47:40,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:47:40,496 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:47:40,496 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-30 20:47:40,496 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:47:40,496 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:47:40,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-09-30 20:47:40,497 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:47:40,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:47:40,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:47:40,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:47:40,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:47:40,511 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:47:40,512 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:47:40,512 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 20:47:40,521 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:49:22,636 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 20:49:22,637 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:22,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:22,904 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 20:49:22,926 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:49:22,926 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-09-30 20:49:22,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 20:49:22,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 20:49:22,927 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:22,927 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-09-30 20:49:23,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:23,277 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 20:49:23,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:49:23,278 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-30 20:49:23,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:23,279 INFO L225 Difference]: With dead ends: 15 [2018-09-30 20:49:23,279 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 20:49:23,280 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 20:49:23,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 20:49:23,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 20:49:23,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 20:49:23,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 20:49:23,285 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-30 20:49:23,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:23,285 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 20:49:23,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 20:49:23,285 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 20:49:23,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 20:49:23,286 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:23,286 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-09-30 20:49:23,286 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:23,287 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:23,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-09-30 20:49:23,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:23,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:23,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:23,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:23,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:23,299 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:49:23,299 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:49:23,300 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:49:23,308 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:49:23,818 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:49:23,818 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:23,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:23,956 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 20:49:23,990 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:49:23,990 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-09-30 20:49:23,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:49:23,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:49:23,991 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:23,992 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-09-30 20:49:24,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:24,659 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 20:49:24,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:49:24,661 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-30 20:49:24,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:24,662 INFO L225 Difference]: With dead ends: 17 [2018-09-30 20:49:24,662 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 20:49:24,662 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:49:24,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 20:49:24,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 20:49:24,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 20:49:24,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 20:49:24,667 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-30 20:49:24,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:24,667 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 20:49:24,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:49:24,668 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 20:49:24,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 20:49:24,668 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:24,668 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-09-30 20:49:24,669 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:24,669 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:24,669 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-09-30 20:49:24,669 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:24,669 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:24,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:24,670 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:24,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:24,681 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:49:24,681 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:49:24,681 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 20:49:24,699 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:49:39,660 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 20:49:39,661 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:39,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:39,931 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 20:49:39,954 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:49:39,954 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-09-30 20:49:39,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:49:39,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:49:39,955 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:39,955 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-09-30 20:49:40,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:40,417 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 20:49:40,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:49:40,420 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-30 20:49:40,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:40,421 INFO L225 Difference]: With dead ends: 19 [2018-09-30 20:49:40,421 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 20:49:40,422 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 20:49:40,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 20:49:40,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 20:49:40,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 20:49:40,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 20:49:40,427 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-30 20:49:40,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:40,427 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 20:49:40,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:49:40,427 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 20:49:40,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 20:49:40,428 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:40,428 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-09-30 20:49:40,429 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:40,429 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:40,429 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-09-30 20:49:40,429 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:40,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:40,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:40,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:40,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:40,444 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:49:40,444 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:49:40,444 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 20:49:40,457 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:49:44,752 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 20:49:44,752 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:44,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:45,113 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 20:49:45,143 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:49:45,144 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-09-30 20:49:45,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:49:45,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:49:45,144 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:45,145 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-09-30 20:49:45,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:45,535 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 20:49:45,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:49:45,536 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-30 20:49:45,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:45,537 INFO L225 Difference]: With dead ends: 21 [2018-09-30 20:49:45,537 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 20:49:45,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:49:45,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 20:49:45,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 20:49:45,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 20:49:45,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 20:49:45,542 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-30 20:49:45,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:45,543 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 20:49:45,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:49:45,543 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 20:49:45,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:49:45,544 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:45,544 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-09-30 20:49:45,544 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:45,544 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:45,544 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-09-30 20:49:45,545 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:45,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:45,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:45,547 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:45,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:45,560 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:49:45,561 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:49:45,561 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 20:49:45,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:46,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:46,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:46,610 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 20:49:46,631 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:49:46,631 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-09-30 20:49:46,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:49:46,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:49:46,632 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:46,632 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-09-30 20:49:47,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:47,201 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 20:49:47,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:49:47,203 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-30 20:49:47,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:47,203 INFO L225 Difference]: With dead ends: 23 [2018-09-30 20:49:47,204 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 20:49:47,204 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:49:47,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 20:49:47,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 20:49:47,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 20:49:47,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 20:49:47,210 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-09-30 20:49:47,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:47,211 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 20:49:47,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:49:47,211 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 20:49:47,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 20:49:47,212 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:47,212 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-09-30 20:49:47,212 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:47,212 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:47,213 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-09-30 20:49:47,213 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:47,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:47,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:47,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:47,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:47,226 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:49:47,226 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:49:47,227 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 20:49:47,247 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:50:10,086 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:50:10,087 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:10,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:10,419 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 20:50:10,440 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:50:10,441 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-09-30 20:50:10,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:50:10,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:50:10,441 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:10,441 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-09-30 20:50:11,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:11,103 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 20:50:11,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:50:11,103 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-30 20:50:11,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:11,104 INFO L225 Difference]: With dead ends: 25 [2018-09-30 20:50:11,104 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 20:50:11,104 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 20:50:11,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 20:50:11,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 20:50:11,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 20:50:11,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 20:50:11,111 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-09-30 20:50:11,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:11,111 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 20:50:11,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:50:11,111 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 20:50:11,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 20:50:11,112 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:11,112 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-09-30 20:50:11,112 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:11,113 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:11,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-09-30 20:50:11,113 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:11,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:11,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:11,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:11,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:11,133 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:50:11,133 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:50:11,133 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 20:50:11,143 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown