java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig01.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 05:13:12,453 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 05:13:12,479 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 05:13:12,493 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 05:13:12,493 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 05:13:12,494 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 05:13:12,498 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 05:13:12,500 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 05:13:12,502 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 05:13:12,504 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 05:13:12,505 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 05:13:12,507 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 05:13:12,508 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 05:13:12,509 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 05:13:12,509 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 05:13:12,522 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 05:13:12,524 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 05:13:12,525 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 05:13:12,527 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 05:13:12,528 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 05:13:12,529 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 05:13:12,535 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 05:13:12,536 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 05:13:12,536 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 05:13:12,537 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 05:13:12,538 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 05:13:12,538 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 05:13:12,543 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 05:13:12,544 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 05:13:12,544 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 05:13:12,545 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 05:13:12,546 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 05:13:12,546 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 05:13:12,548 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 05:13:12,549 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 05:13:12,549 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 05:13:12,569 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 05:13:12,569 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 05:13:12,569 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 05:13:12,570 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 05:13:12,571 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 05:13:12,571 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 05:13:12,571 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 05:13:12,571 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 05:13:12,571 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:13:12,572 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 05:13:12,572 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 05:13:12,572 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 05:13:12,572 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 05:13:12,572 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 05:13:12,572 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 05:13:12,573 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 05:13:12,573 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 05:13:12,574 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 05:13:12,574 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 05:13:12,613 INFO ]: Repository-Root is: /tmp [2018-06-22 05:13:12,648 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 05:13:12,652 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 05:13:12,654 INFO ]: Initializing SmtParser... [2018-06-22 05:13:12,654 INFO ]: SmtParser initialized [2018-06-22 05:13:12,655 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig01.c.smt2 [2018-06-22 05:13:12,657 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-22 05:13:12,759 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig01.c.smt2 unknown [2018-06-22 05:13:12,982 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig01.c.smt2 [2018-06-22 05:13:12,986 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 05:13:12,993 INFO ]: Walking toolchain with 4 elements. [2018-06-22 05:13:12,993 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 05:13:12,993 INFO ]: Initializing ChcToBoogie... [2018-06-22 05:13:12,993 INFO ]: ChcToBoogie initialized [2018-06-22 05:13:13,115 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:13:12" (1/1) ... [2018-06-22 05:13:13,201 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:13:13 Unit [2018-06-22 05:13:13,201 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 05:13:13,201 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 05:13:13,201 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 05:13:13,201 INFO ]: Boogie Preprocessor initialized [2018-06-22 05:13:13,227 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:13:13" (1/1) ... [2018-06-22 05:13:13,227 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:13:13" (1/1) ... [2018-06-22 05:13:13,235 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:13:13" (1/1) ... [2018-06-22 05:13:13,235 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:13:13" (1/1) ... [2018-06-22 05:13:13,239 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:13:13" (1/1) ... [2018-06-22 05:13:13,249 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:13:13" (1/1) ... [2018-06-22 05:13:13,250 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:13:13" (1/1) ... [2018-06-22 05:13:13,252 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 05:13:13,252 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 05:13:13,252 INFO ]: Initializing RCFGBuilder... [2018-06-22 05:13:13,252 INFO ]: RCFGBuilder initialized [2018-06-22 05:13:13,253 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:13:13" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 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 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:13:13,304 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 05:13:13,304 INFO ]: Found specification of procedure gotoProc [2018-06-22 05:13:13,304 INFO ]: Found implementation of procedure gotoProc [2018-06-22 05:13:13,304 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 05:13:13,304 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 05:13:13,304 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 05:13:13,562 INFO ]: Using library mode [2018-06-22 05:13:13,563 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:13:13 BoogieIcfgContainer [2018-06-22 05:13:13,563 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 05:13:13,564 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 05:13:13,565 INFO ]: Initializing TraceAbstraction... [2018-06-22 05:13:13,569 INFO ]: TraceAbstraction initialized [2018-06-22 05:13:13,570 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:13:12" (1/3) ... [2018-06-22 05:13:13,571 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e901c8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:13:13, skipping insertion in model container [2018-06-22 05:13:13,572 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:13:13" (2/3) ... [2018-06-22 05:13:13,572 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e901c8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:13:13, skipping insertion in model container [2018-06-22 05:13:13,572 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:13:13" (3/3) ... [2018-06-22 05:13:13,575 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 05:13:13,884 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 05:13:13,901 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 05:13:14,377 INFO ]: Using default assertion order modulation [2018-06-22 05:13:14,377 INFO ]: Interprodecural is true [2018-06-22 05:13:14,377 INFO ]: Hoare is false [2018-06-22 05:13:14,377 INFO ]: Compute interpolants for FPandBP [2018-06-22 05:13:14,377 INFO ]: Backedges is TWOTRACK [2018-06-22 05:13:14,377 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 05:13:14,377 INFO ]: Difference is false [2018-06-22 05:13:14,377 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 05:13:14,378 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 05:13:14,392 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 05:13:14,401 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 05:13:14,402 INFO ]: Found error trace [2018-06-22 05:13:14,403 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:13:14,403 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:13:14,407 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-22 05:13:14,409 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:13:14,409 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:13:14,444 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:13:14,444 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:13:14,444 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:13:14,490 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:13:14,553 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:13:14,555 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 05:13:14,555 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 05:13:14,556 INFO ]: Interpolant automaton has 3 states [2018-06-22 05:13:14,567 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 05:13:14,567 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:13:14,570 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 05:13:14,637 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:13:14,637 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 05:13:14,637 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 05:13:14,639 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 05:13:14,639 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:13:14,648 INFO ]: With dead ends: 9 [2018-06-22 05:13:14,648 INFO ]: Without dead ends: 9 [2018-06-22 05:13:14,650 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:13:14,669 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 05:13:14,695 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 05:13:14,696 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 05:13:14,697 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 05:13:14,698 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 05:13:14,698 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:13:14,699 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 05:13:14,699 INFO ]: Interpolant automaton has 3 states. [2018-06-22 05:13:14,699 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 05:13:14,699 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 05:13:14,699 INFO ]: Found error trace [2018-06-22 05:13:14,699 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:13:14,699 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:13:14,699 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-22 05:13:14,699 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:13:14,699 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:13:14,700 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:13:14,700 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:13:14,700 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:13:14,738 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:13:14,887 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:13:14,888 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:13:14,888 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:13:14,895 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:13:14,942 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:13:14,954 INFO ]: Computing forward predicates... [2018-06-22 05:13:15,354 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:13:15,376 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:13:15,376 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 05:13:15,377 INFO ]: Interpolant automaton has 5 states [2018-06-22 05:13:15,377 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 05:13:15,377 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-22 05:13:15,377 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 05:13:15,475 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:13:15,475 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 05:13:15,475 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 05:13:15,475 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 05:13:15,476 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:13:15,476 INFO ]: With dead ends: 11 [2018-06-22 05:13:15,476 INFO ]: Without dead ends: 11 [2018-06-22 05:13:15,477 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:13:15,477 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 05:13:15,478 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 05:13:15,478 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 05:13:15,478 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 05:13:15,479 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-22 05:13:15,479 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:13:15,479 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 05:13:15,479 INFO ]: Interpolant automaton has 5 states. [2018-06-22 05:13:15,479 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 05:13:15,482 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 05:13:15,482 INFO ]: Found error trace [2018-06-22 05:13:15,482 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:13:15,482 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:13:15,482 INFO ]: Analyzing trace with hash 1062095287, now seen corresponding path program 2 times [2018-06-22 05:13:15,482 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:13:15,482 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:13:15,484 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:13:15,484 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:13:15,484 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:13:15,542 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:13:15,913 WARN ]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-06-22 05:13:15,959 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:13:15,959 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:13:15,959 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:13:15,966 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 05:13:16,015 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:13:16,015 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:13:16,019 INFO ]: Computing forward predicates... [2018-06-22 05:13:17,432 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:13:17,465 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:13:17,465 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-22 05:13:17,465 INFO ]: Interpolant automaton has 7 states [2018-06-22 05:13:17,466 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 05:13:17,466 INFO ]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-06-22 05:13:17,466 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-06-22 05:13:17,758 WARN ]: Spent 259.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 6 [2018-06-22 05:13:17,973 WARN ]: Spent 110.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-06-22 05:13:18,216 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:13:18,217 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 05:13:18,217 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 05:13:18,217 INFO ]: Start accepts. Automaton has 7 states. Word has length 10 [2018-06-22 05:13:18,217 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:13:18,218 INFO ]: With dead ends: 12 [2018-06-22 05:13:18,218 INFO ]: Without dead ends: 12 [2018-06-22 05:13:18,218 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-06-22 05:13:18,218 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 05:13:18,219 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 05:13:18,219 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 05:13:18,220 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 05:13:18,220 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-22 05:13:18,220 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:13:18,220 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 05:13:18,220 INFO ]: Interpolant automaton has 7 states. [2018-06-22 05:13:18,220 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 05:13:18,220 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 05:13:18,220 INFO ]: Found error trace [2018-06-22 05:13:18,220 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:13:18,221 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:13:18,221 INFO ]: Analyzing trace with hash -1433955954, now seen corresponding path program 3 times [2018-06-22 05:13:18,221 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:13:18,221 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:13:18,222 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:13:18,222 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:13:18,222 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:13:18,267 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:13:18,483 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:13:18,483 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:13:18,483 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:13:18,492 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 05:13:18,550 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 05:13:18,550 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:13:18,554 INFO ]: Computing forward predicates... [2018-06-22 05:13:19,194 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:19,239 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:26,785 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:13:26,820 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:13:26,820 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-06-22 05:13:26,820 INFO ]: Interpolant automaton has 9 states [2018-06-22 05:13:26,820 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 05:13:26,821 INFO ]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-06-22 05:13:26,821 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 9 states. [2018-06-22 05:13:27,069 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:13:27,069 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 05:13:27,069 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 05:13:27,069 INFO ]: Start accepts. Automaton has 9 states. Word has length 11 [2018-06-22 05:13:27,069 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:13:27,069 INFO ]: With dead ends: 13 [2018-06-22 05:13:27,069 INFO ]: Without dead ends: 13 [2018-06-22 05:13:27,070 INFO ]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2018-06-22 05:13:27,070 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 05:13:27,073 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 05:13:27,073 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 05:13:27,073 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 05:13:27,073 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-22 05:13:27,073 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:13:27,073 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 05:13:27,073 INFO ]: Interpolant automaton has 9 states. [2018-06-22 05:13:27,073 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 05:13:27,074 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 05:13:27,074 INFO ]: Found error trace [2018-06-22 05:13:27,074 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:13:27,074 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:13:27,074 INFO ]: Analyzing trace with hash -1502133097, now seen corresponding path program 4 times [2018-06-22 05:13:27,074 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:13:27,074 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:13:27,075 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:13:27,075 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:13:27,075 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:13:27,118 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:13:27,291 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:13:27,291 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:13:27,291 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:13:27,301 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 05:13:27,347 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 05:13:27,347 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:13:27,351 INFO ]: Computing forward predicates... [2018-06-22 05:13:34,034 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:13:34,054 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:13:34,054 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-06-22 05:13:34,054 INFO ]: Interpolant automaton has 9 states [2018-06-22 05:13:34,054 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 05:13:34,054 INFO ]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-06-22 05:13:34,054 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 9 states. [2018-06-22 05:13:34,302 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:13:34,302 INFO ]: Finished difference Result 14 states and 14 transitions. [2018-06-22 05:13:34,325 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 05:13:34,325 INFO ]: Start accepts. Automaton has 9 states. Word has length 12 [2018-06-22 05:13:34,325 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:13:34,326 INFO ]: With dead ends: 14 [2018-06-22 05:13:34,326 INFO ]: Without dead ends: 14 [2018-06-22 05:13:34,326 INFO ]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2018-06-22 05:13:34,326 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-22 05:13:34,328 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-06-22 05:13:34,328 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-22 05:13:34,328 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-06-22 05:13:34,328 INFO ]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-06-22 05:13:34,329 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:13:34,329 INFO ]: Abstraction has 14 states and 14 transitions. [2018-06-22 05:13:34,329 INFO ]: Interpolant automaton has 9 states. [2018-06-22 05:13:34,329 INFO ]: Start isEmpty. Operand 14 states and 14 transitions. [2018-06-22 05:13:34,329 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 05:13:34,329 INFO ]: Found error trace [2018-06-22 05:13:34,329 INFO ]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:13:34,329 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:13:34,329 INFO ]: Analyzing trace with hash 679342766, now seen corresponding path program 5 times [2018-06-22 05:13:34,329 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:13:34,329 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:13:34,330 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:13:34,330 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:13:34,330 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:13:34,396 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:13:34,619 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:13:34,619 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:13:34,619 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:13:34,630 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 05:13:34,669 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-22 05:13:34,669 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:13:34,672 INFO ]: Computing forward predicates... [2018-06-22 05:13:35,671 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:13:35,701 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:13:35,702 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-06-22 05:13:35,702 INFO ]: Interpolant automaton has 10 states [2018-06-22 05:13:35,702 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 05:13:35,702 INFO ]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-06-22 05:13:35,702 INFO ]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2018-06-22 05:13:36,026 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:13:36,026 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-22 05:13:36,026 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 05:13:36,026 INFO ]: Start accepts. Automaton has 10 states. Word has length 13 [2018-06-22 05:13:36,026 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:13:36,026 INFO ]: With dead ends: 15 [2018-06-22 05:13:36,026 INFO ]: Without dead ends: 15 [2018-06-22 05:13:36,027 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2018-06-22 05:13:36,027 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 05:13:36,028 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 05:13:36,028 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 05:13:36,032 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-06-22 05:13:36,032 INFO ]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-06-22 05:13:36,032 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:13:36,032 INFO ]: Abstraction has 15 states and 15 transitions. [2018-06-22 05:13:36,032 INFO ]: Interpolant automaton has 10 states. [2018-06-22 05:13:36,032 INFO ]: Start isEmpty. Operand 15 states and 15 transitions. [2018-06-22 05:13:36,033 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-22 05:13:36,033 INFO ]: Found error trace [2018-06-22 05:13:36,033 INFO ]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:13:36,033 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:13:36,033 INFO ]: Analyzing trace with hash -414382217, now seen corresponding path program 6 times [2018-06-22 05:13:36,033 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:13:36,033 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:13:36,033 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:13:36,033 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:13:36,034 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:13:36,121 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:13:36,369 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:13:36,369 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:13:36,369 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:13:36,374 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 05:13:36,438 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-06-22 05:13:36,439 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:13:36,442 INFO ]: Computing forward predicates... [2018-06-22 05:13:40,767 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:13:40,795 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:13:40,795 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2018-06-22 05:13:40,795 INFO ]: Interpolant automaton has 12 states [2018-06-22 05:13:40,795 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 05:13:40,795 INFO ]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2018-06-22 05:13:40,796 INFO ]: Start difference. First operand 15 states and 15 transitions. Second operand 12 states. [2018-06-22 05:13:41,071 WARN ]: Spent 144.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2018-06-22 05:13:41,306 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:13:41,306 INFO ]: Finished difference Result 17 states and 17 transitions. [2018-06-22 05:13:41,306 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 05:13:41,306 INFO ]: Start accepts. Automaton has 12 states. Word has length 14 [2018-06-22 05:13:41,306 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:13:41,306 INFO ]: With dead ends: 17 [2018-06-22 05:13:41,306 INFO ]: Without dead ends: 17 [2018-06-22 05:13:41,307 INFO ]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2018-06-22 05:13:41,307 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 05:13:41,310 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 05:13:41,310 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 05:13:41,311 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-06-22 05:13:41,311 INFO ]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-06-22 05:13:41,311 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:13:41,311 INFO ]: Abstraction has 17 states and 17 transitions. [2018-06-22 05:13:41,311 INFO ]: Interpolant automaton has 12 states. [2018-06-22 05:13:41,311 INFO ]: Start isEmpty. Operand 17 states and 17 transitions. [2018-06-22 05:13:41,311 INFO ]: Finished isEmpty. Found accepting run of length 17 [2018-06-22 05:13:41,311 INFO ]: Found error trace [2018-06-22 05:13:41,311 INFO ]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:13:41,311 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:13:41,311 INFO ]: Analyzing trace with hash 1237160535, now seen corresponding path program 7 times [2018-06-22 05:13:41,311 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:13:41,311 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:13:41,312 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:13:41,312 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:13:41,312 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:13:41,368 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:13:42,066 WARN ]: Spent 437.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 9 [2018-06-22 05:13:42,391 WARN ]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 05:13:42,792 WARN ]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-22 05:13:42,898 INFO ]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:13:42,898 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:13:42,898 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:13:42,906 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:13:42,950 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:13:42,954 INFO ]: Computing forward predicates... [2018-06-22 05:13:53,319 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:13:53,336 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:53,349 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:53,377 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:53,388 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:53,409 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:53,439 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:53,457 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:53,472 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:53,475 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:53,512 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:53,520 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:53,536 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:53,537 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:53,565 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:53,570 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:53,578 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:53,586 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:53,605 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:53,653 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:53,668 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:53,680 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:53,688 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:13:53,706 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:53,717 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 05:13:53,735 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:53,763 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:53,782 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:53,787 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:53,916 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:53,926 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:53,944 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:53,952 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:53,982 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:54,006 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:54,016 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:54,041 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:54,071 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:54,076 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:54,078 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:54,083 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:54,088 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:54,099 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:54,121 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:54,127 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:54,169 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:13:54,187 WARN ]: expecting exponential blowup for input size 6 Received shutdown request... [2018-06-22 05:14:18,180 INFO ]: Timeout while computing interpolants [2018-06-22 05:14:18,380 WARN ]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:14:18,380 WARN ]: Verification canceled [2018-06-22 05:14:18,384 WARN ]: Timeout [2018-06-22 05:14:18,384 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 05:14:18 BoogieIcfgContainer [2018-06-22 05:14:18,384 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 05:14:18,403 INFO ]: Toolchain (without parser) took 65398.08 ms. Allocated memory was 309.3 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 261.7 MB in the beginning and 972.3 MB in the end (delta: -710.6 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 05:14:18,404 INFO ]: SmtParser took 0.12 ms. Allocated memory is still 309.3 MB. Free memory is still 272.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 05:14:18,405 INFO ]: ChcToBoogie took 207.81 ms. Allocated memory is still 309.3 MB. Free memory was 261.7 MB in the beginning and 259.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:14:18,405 INFO ]: Boogie Preprocessor took 50.50 ms. Allocated memory is still 309.3 MB. Free memory was 259.7 MB in the beginning and 257.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:14:18,405 INFO ]: RCFGBuilder took 310.48 ms. Allocated memory is still 309.3 MB. Free memory was 257.7 MB in the beginning and 249.7 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:14:18,406 INFO ]: TraceAbstraction took 64819.92 ms. Allocated memory was 309.3 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 248.7 MB in the beginning and 972.3 MB in the end (delta: -723.6 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 05:14:18,412 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.12 ms. Allocated memory is still 309.3 MB. Free memory is still 272.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 207.81 ms. Allocated memory is still 309.3 MB. Free memory was 261.7 MB in the beginning and 259.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 50.50 ms. Allocated memory is still 309.3 MB. Free memory was 259.7 MB in the beginning and 257.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 310.48 ms. Allocated memory is still 309.3 MB. Free memory was 257.7 MB in the beginning and 249.7 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 64819.92 ms. Allocated memory was 309.3 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 248.7 MB in the beginning and 972.3 MB in the end (delta: -723.6 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 17 with TraceHistMax 9, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while XnfDer was eliminating 9532 quantified variables from 16 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 64.0s OverallTime, 8 OverallIterations, 9 TraceHistogramMax, 2.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 49 SDtfs, 19 SDslu, 173 SDs, 0 SdLazy, 64 SolverSat, 43 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 141 GetRequests, 44 SyntacticMatches, 24 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 4.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 23.5s InterpolantComputationTime, 143 NumberOfCodeBlocks, 143 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 130 ConstructedInterpolants, 0 QuantifiedInterpolants, 7935 SizeOfPredicates, 24 NumberOfNonLiveVariables, 934 ConjunctsInSsa, 219 ConjunctsInUnsatCore, 13 InterpolantComputations, 1 PerfectInterpolantSequences, 0/162 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/dillig01.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_05-14-18-473.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/dillig01.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_05-14-18-473.csv Completed graceful shutdown