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/NetBSD_loop_int.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 05:47:21,348 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 05:47:21,350 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 05:47:21,366 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 05:47:21,367 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 05:47:21,368 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 05:47:21,369 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 05:47:21,371 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 05:47:21,373 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 05:47:21,373 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 05:47:21,375 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 05:47:21,376 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 05:47:21,377 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 05:47:21,379 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 05:47:21,380 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 05:47:21,381 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 05:47:21,390 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 05:47:21,392 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 05:47:21,394 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 05:47:21,395 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 05:47:21,396 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 05:47:21,400 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 05:47:21,401 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 05:47:21,401 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 05:47:21,402 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 05:47:21,406 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 05:47:21,407 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 05:47:21,408 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 05:47:21,409 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 05:47:21,412 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 05:47:21,412 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 05:47:21,413 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 05:47:21,413 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 05:47:21,414 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 05:47:21,414 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 05:47:21,415 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 05:47:21,435 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 05:47:21,435 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 05:47:21,435 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 05:47:21,436 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 05:47:21,437 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 05:47:21,437 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 05:47:21,437 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 05:47:21,437 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 05:47:21,437 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:47:21,438 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 05:47:21,441 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 05:47:21,441 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 05:47:21,441 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 05:47:21,441 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 05:47:21,441 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 05:47:21,442 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 05:47:21,442 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 05:47:21,443 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 05:47:21,444 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 05:47:21,487 INFO ]: Repository-Root is: /tmp [2018-06-22 05:47:21,508 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 05:47:21,512 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 05:47:21,514 INFO ]: Initializing SmtParser... [2018-06-22 05:47:21,514 INFO ]: SmtParser initialized [2018-06-22 05:47:21,515 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/NetBSD_loop_int.c.smt2 [2018-06-22 05:47:21,516 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 05:47:21,597 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/NetBSD_loop_int.c.smt2 unknown [2018-06-22 05:47:21,895 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/NetBSD_loop_int.c.smt2 [2018-06-22 05:47:21,899 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 05:47:21,906 INFO ]: Walking toolchain with 4 elements. [2018-06-22 05:47:21,906 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 05:47:21,906 INFO ]: Initializing ChcToBoogie... [2018-06-22 05:47:21,907 INFO ]: ChcToBoogie initialized [2018-06-22 05:47:21,912 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:47:21" (1/1) ... [2018-06-22 05:47:21,979 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:47:21 Unit [2018-06-22 05:47:21,979 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 05:47:21,980 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 05:47:21,980 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 05:47:21,980 INFO ]: Boogie Preprocessor initialized [2018-06-22 05:47:21,998 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:47:21" (1/1) ... [2018-06-22 05:47:21,998 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:47:21" (1/1) ... [2018-06-22 05:47:22,005 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:47:21" (1/1) ... [2018-06-22 05:47:22,005 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:47:21" (1/1) ... [2018-06-22 05:47:22,010 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:47:21" (1/1) ... [2018-06-22 05:47:22,012 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:47:21" (1/1) ... [2018-06-22 05:47:22,014 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:47:21" (1/1) ... [2018-06-22 05:47:22,016 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 05:47:22,017 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 05:47:22,017 INFO ]: Initializing RCFGBuilder... [2018-06-22 05:47:22,017 INFO ]: RCFGBuilder initialized [2018-06-22 05:47:22,018 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:47:21" (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) [2018-06-22 05:47:22,045 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 05:47:22,045 INFO ]: Found specification of procedure gotoProc [2018-06-22 05:47:22,045 INFO ]: Found implementation of procedure gotoProc [2018-06-22 05:47:22,045 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 05:47:22,045 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 05:47:22,045 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:47:22,323 INFO ]: Using library mode [2018-06-22 05:47:22,324 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:47:22 BoogieIcfgContainer [2018-06-22 05:47:22,324 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 05:47:22,326 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 05:47:22,326 INFO ]: Initializing TraceAbstraction... [2018-06-22 05:47:22,329 INFO ]: TraceAbstraction initialized [2018-06-22 05:47:22,329 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:47:21" (1/3) ... [2018-06-22 05:47:22,330 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f447fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:47:22, skipping insertion in model container [2018-06-22 05:47:22,330 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:47:21" (2/3) ... [2018-06-22 05:47:22,330 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f447fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:47:22, skipping insertion in model container [2018-06-22 05:47:22,330 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:47:22" (3/3) ... [2018-06-22 05:47:22,332 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 05:47:22,341 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 05:47:22,349 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 05:47:22,400 INFO ]: Using default assertion order modulation [2018-06-22 05:47:22,400 INFO ]: Interprodecural is true [2018-06-22 05:47:22,400 INFO ]: Hoare is false [2018-06-22 05:47:22,400 INFO ]: Compute interpolants for FPandBP [2018-06-22 05:47:22,400 INFO ]: Backedges is TWOTRACK [2018-06-22 05:47:22,400 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 05:47:22,400 INFO ]: Difference is false [2018-06-22 05:47:22,400 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 05:47:22,401 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 05:47:22,414 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 05:47:22,423 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 05:47:22,424 INFO ]: Found error trace [2018-06-22 05:47:22,424 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:47:22,425 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:47:22,430 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-22 05:47:22,432 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:47:22,432 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:47:22,467 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:47:22,467 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:47:22,467 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:47:22,510 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:47:22,579 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:47:22,581 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 05:47:22,581 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 05:47:22,583 INFO ]: Interpolant automaton has 3 states [2018-06-22 05:47:22,594 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 05:47:22,594 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:47:22,596 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 05:47:22,657 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:47:22,657 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 05:47:22,658 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 05:47:22,659 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 05:47:22,659 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:47:22,668 INFO ]: With dead ends: 9 [2018-06-22 05:47:22,668 INFO ]: Without dead ends: 9 [2018-06-22 05:47:22,670 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 05:47:22,685 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 05:47:22,716 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 05:47:22,717 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 05:47:22,717 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 05:47:22,719 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 05:47:22,719 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:47:22,719 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 05:47:22,719 INFO ]: Interpolant automaton has 3 states. [2018-06-22 05:47:22,719 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 05:47:22,719 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 05:47:22,720 INFO ]: Found error trace [2018-06-22 05:47:22,720 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:47:22,720 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:47:22,720 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-22 05:47:22,720 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:47:22,720 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:47:22,721 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:47:22,721 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:47:22,721 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:47:22,781 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:47:23,039 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:47:23,039 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:47:23,039 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 05:47:23,047 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:47:23,116 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:47:23,124 INFO ]: Computing forward predicates... [2018-06-22 05:47:23,646 WARN ]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 05:47:27,231 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:47:27,252 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:47:27,252 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 05:47:27,252 INFO ]: Interpolant automaton has 5 states [2018-06-22 05:47:27,252 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 05:47:27,252 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-22 05:47:27,252 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 05:47:27,322 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:47:27,322 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 05:47:27,323 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 05:47:27,323 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 05:47:27,323 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:47:27,323 INFO ]: With dead ends: 10 [2018-06-22 05:47:27,323 INFO ]: Without dead ends: 10 [2018-06-22 05:47:27,324 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:47:27,324 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 05:47:27,325 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 05:47:27,325 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 05:47:27,325 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 05:47:27,325 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 05:47:27,325 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:47:27,325 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 05:47:27,325 INFO ]: Interpolant automaton has 5 states. [2018-06-22 05:47:27,325 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 05:47:27,325 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 05:47:27,325 INFO ]: Found error trace [2018-06-22 05:47:27,326 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:47:27,326 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:47:27,326 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-22 05:47:27,326 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:47:27,326 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:47:27,327 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:47:27,327 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:47:27,327 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:47:27,418 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:47:27,526 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:47:27,526 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:47:27,526 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 05:47:27,532 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 05:47:27,588 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:47:27,588 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:47:27,591 INFO ]: Computing forward predicates... [2018-06-22 05:47:28,978 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:47:29,000 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:47:29,000 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-22 05:47:29,000 INFO ]: Interpolant automaton has 6 states [2018-06-22 05:47:29,000 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 05:47:29,000 INFO ]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:47:29,000 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-22 05:47:29,189 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:47:29,189 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 05:47:29,277 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 05:47:29,277 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-22 05:47:29,277 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:47:29,278 INFO ]: With dead ends: 11 [2018-06-22 05:47:29,278 INFO ]: Without dead ends: 11 [2018-06-22 05:47:29,278 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-06-22 05:47:29,278 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 05:47:29,279 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 05:47:29,279 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 05:47:29,280 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 05:47:29,280 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-22 05:47:29,280 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:47:29,280 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 05:47:29,280 INFO ]: Interpolant automaton has 6 states. [2018-06-22 05:47:29,280 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 05:47:29,280 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 05:47:29,280 INFO ]: Found error trace [2018-06-22 05:47:29,280 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:47:29,280 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:47:29,280 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 3 times [2018-06-22 05:47:29,280 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:47:29,281 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:47:29,281 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:47:29,281 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:47:29,281 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:47:29,327 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:47:29,566 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:47:29,566 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:47:29,566 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 05:47:29,578 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 05:47:29,663 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 05:47:29,663 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:47:29,666 INFO ]: Computing forward predicates... [2018-06-22 05:47:34,143 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:47:35,412 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:47:35,434 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:47:35,434 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-22 05:47:35,434 INFO ]: Interpolant automaton has 8 states [2018-06-22 05:47:35,434 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 05:47:35,434 INFO ]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-06-22 05:47:35,435 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 8 states. [2018-06-22 05:47:35,603 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:47:35,603 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 05:47:35,603 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 05:47:35,603 INFO ]: Start accepts. Automaton has 8 states. Word has length 10 [2018-06-22 05:47:35,603 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:47:35,604 INFO ]: With dead ends: 12 [2018-06-22 05:47:35,604 INFO ]: Without dead ends: 12 [2018-06-22 05:47:35,604 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-06-22 05:47:35,604 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 05:47:35,605 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 05:47:35,605 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 05:47:35,606 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 05:47:35,606 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-22 05:47:35,606 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:47:35,606 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 05:47:35,606 INFO ]: Interpolant automaton has 8 states. [2018-06-22 05:47:35,606 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 05:47:35,606 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 05:47:35,606 INFO ]: Found error trace [2018-06-22 05:47:35,606 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:47:35,607 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:47:35,607 INFO ]: Analyzing trace with hash 201204236, now seen corresponding path program 4 times [2018-06-22 05:47:35,607 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:47:35,607 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:47:35,607 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:47:35,608 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:47:35,608 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:47:35,669 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:47:35,901 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:47:35,901 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:47:35,901 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 05:47:35,910 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 05:47:35,977 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 05:47:35,977 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:47:35,981 INFO ]: Computing forward predicates... [2018-06-22 05:47:44,994 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:47:45,016 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:47:45,016 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-06-22 05:47:45,016 INFO ]: Interpolant automaton has 8 states [2018-06-22 05:47:45,016 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 05:47:45,016 INFO ]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-06-22 05:47:45,016 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 8 states. [2018-06-22 05:47:45,216 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:47:45,216 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 05:47:45,216 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 05:47:45,216 INFO ]: Start accepts. Automaton has 8 states. Word has length 11 [2018-06-22 05:47:45,216 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:47:45,216 INFO ]: With dead ends: 13 [2018-06-22 05:47:45,216 INFO ]: Without dead ends: 13 [2018-06-22 05:47:45,217 INFO ]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2018-06-22 05:47:45,217 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 05:47:45,218 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 05:47:45,218 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 05:47:45,218 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 05:47:45,218 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-22 05:47:45,218 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:47:45,218 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 05:47:45,218 INFO ]: Interpolant automaton has 8 states. [2018-06-22 05:47:45,218 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 05:47:45,218 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 05:47:45,218 INFO ]: Found error trace [2018-06-22 05:47:45,218 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:47:45,218 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:47:45,218 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 5 times [2018-06-22 05:47:45,218 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:47:45,218 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:47:45,219 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:47:45,219 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:47:45,219 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:47:45,307 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:47:45,655 WARN ]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 05:47:46,153 WARN ]: Spent 455.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 05:47:46,409 WARN ]: Spent 181.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2018-06-22 05:47:46,494 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:47:46,494 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:47:46,494 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 05:47:46,500 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 05:47:46,575 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-22 05:47:46,575 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:47:46,578 INFO ]: Computing forward predicates... [2018-06-22 05:47:55,410 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:47:55,442 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:47:55,442 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-06-22 05:47:55,442 INFO ]: Interpolant automaton has 9 states [2018-06-22 05:47:55,442 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 05:47:55,443 INFO ]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-06-22 05:47:55,443 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 9 states. [2018-06-22 05:47:55,785 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:47:55,785 INFO ]: Finished difference Result 14 states and 14 transitions. [2018-06-22 05:47:55,785 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 05:47:55,785 INFO ]: Start accepts. Automaton has 9 states. Word has length 12 [2018-06-22 05:47:55,785 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:47:55,785 INFO ]: With dead ends: 14 [2018-06-22 05:47:55,785 INFO ]: Without dead ends: 14 [2018-06-22 05:47:55,786 INFO ]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2018-06-22 05:47:55,786 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-22 05:47:55,787 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-06-22 05:47:55,787 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-22 05:47:55,787 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-06-22 05:47:55,787 INFO ]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-06-22 05:47:55,787 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:47:55,787 INFO ]: Abstraction has 14 states and 14 transitions. [2018-06-22 05:47:55,787 INFO ]: Interpolant automaton has 9 states. [2018-06-22 05:47:55,787 INFO ]: Start isEmpty. Operand 14 states and 14 transitions. [2018-06-22 05:47:55,787 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 05:47:55,787 INFO ]: Found error trace [2018-06-22 05:47:55,787 INFO ]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:47:55,788 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:47:55,788 INFO ]: Analyzing trace with hash 23503628, now seen corresponding path program 6 times [2018-06-22 05:47:55,788 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:47:55,788 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:47:55,788 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:47:55,788 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:47:55,788 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:47:55,868 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:47:56,172 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:47:56,172 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:47:56,172 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) [2018-06-22 05:47:56,188 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:47:56,267 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-06-22 05:47:56,267 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:47:56,272 INFO ]: Computing forward predicates... [2018-06-22 05:47:56,613 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:47:56,614 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:48:05,587 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:48:05,607 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:48:05,607 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-06-22 05:48:05,607 INFO ]: Interpolant automaton has 10 states [2018-06-22 05:48:05,607 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 05:48:05,607 INFO ]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2018-06-22 05:48:05,608 INFO ]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2018-06-22 05:48:05,931 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:48:05,931 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-22 05:48:05,931 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 05:48:05,931 INFO ]: Start accepts. Automaton has 10 states. Word has length 13 [2018-06-22 05:48:05,932 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:48:05,932 INFO ]: With dead ends: 15 [2018-06-22 05:48:05,932 INFO ]: Without dead ends: 15 [2018-06-22 05:48:05,932 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2018-06-22 05:48:05,932 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 05:48:05,934 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 05:48:05,934 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 05:48:05,934 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-06-22 05:48:05,934 INFO ]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-06-22 05:48:05,934 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:48:05,934 INFO ]: Abstraction has 15 states and 15 transitions. [2018-06-22 05:48:05,934 INFO ]: Interpolant automaton has 10 states. [2018-06-22 05:48:05,934 INFO ]: Start isEmpty. Operand 15 states and 15 transitions. [2018-06-22 05:48:05,935 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-22 05:48:05,935 INFO ]: Found error trace [2018-06-22 05:48:05,935 INFO ]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:48:05,935 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:48:05,935 INFO ]: Analyzing trace with hash 726730004, now seen corresponding path program 7 times [2018-06-22 05:48:05,935 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:48:05,935 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:48:05,936 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:48:05,936 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:48:05,936 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:48:06,013 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:48:06,406 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:48:06,406 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:48:06,406 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 05:48:06,414 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:48:06,487 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:48:06,492 INFO ]: Computing forward predicates... [2018-06-22 05:48:21,416 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:48:21,436 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:48:21,436 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-06-22 05:48:21,436 INFO ]: Interpolant automaton has 11 states [2018-06-22 05:48:21,436 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-22 05:48:21,436 INFO ]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-06-22 05:48:21,436 INFO ]: Start difference. First operand 15 states and 15 transitions. Second operand 11 states. [2018-06-22 05:48:21,996 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:48:21,997 INFO ]: Finished difference Result 17 states and 17 transitions. [2018-06-22 05:48:21,997 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 05:48:21,997 INFO ]: Start accepts. Automaton has 11 states. Word has length 14 [2018-06-22 05:48:21,997 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:48:21,997 INFO ]: With dead ends: 17 [2018-06-22 05:48:21,997 INFO ]: Without dead ends: 17 [2018-06-22 05:48:21,998 INFO ]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2018-06-22 05:48:21,998 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 05:48:21,999 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 05:48:21,999 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 05:48:21,999 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-06-22 05:48:22,002 INFO ]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-06-22 05:48:22,002 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:48:22,002 INFO ]: Abstraction has 17 states and 17 transitions. [2018-06-22 05:48:22,002 INFO ]: Interpolant automaton has 11 states. [2018-06-22 05:48:22,002 INFO ]: Start isEmpty. Operand 17 states and 17 transitions. [2018-06-22 05:48:22,003 INFO ]: Finished isEmpty. Found accepting run of length 17 [2018-06-22 05:48:22,003 INFO ]: Found error trace [2018-06-22 05:48:22,003 INFO ]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:48:22,003 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:48:22,003 INFO ]: Analyzing trace with hash -1752374252, now seen corresponding path program 8 times [2018-06-22 05:48:22,003 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:48:22,003 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:48:22,003 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:48:22,004 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:48:22,004 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:48:22,265 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:48:22,573 INFO ]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:48:22,573 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:48:22,573 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:48:22,704 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 05:48:22,808 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:48:22,808 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:48:22,815 INFO ]: Computing forward predicates... [2018-06-22 05:48:23,239 WARN ]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 10 [2018-06-22 05:48:24,815 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:48:25,091 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:48:26,941 WARN ]: expecting exponential blowup for input size 6 Received shutdown request... [2018-06-22 05:48:27,481 INFO ]: Timeout while computing interpolants [2018-06-22 05:48:27,681 WARN ]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:48:27,682 WARN ]: Verification canceled [2018-06-22 05:48:27,686 WARN ]: Timeout [2018-06-22 05:48:27,686 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 05:48:27 BoogieIcfgContainer [2018-06-22 05:48:27,686 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 05:48:27,687 INFO ]: Toolchain (without parser) took 65786.89 ms. Allocated memory was 307.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 256.2 MB in the beginning and 995.8 MB in the end (delta: -739.7 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 05:48:27,688 INFO ]: SmtParser took 0.11 ms. Allocated memory is still 307.8 MB. Free memory is still 272.2 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 05:48:27,694 INFO ]: ChcToBoogie took 73.40 ms. Allocated memory is still 307.8 MB. Free memory was 256.2 MB in the beginning and 254.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:48:27,694 INFO ]: Boogie Preprocessor took 36.24 ms. Allocated memory is still 307.8 MB. Free memory was 254.2 MB in the beginning and 252.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:48:27,695 INFO ]: RCFGBuilder took 306.96 ms. Allocated memory is still 307.8 MB. Free memory was 252.2 MB in the beginning and 240.2 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:48:27,695 INFO ]: TraceAbstraction took 65360.28 ms. Allocated memory was 307.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 240.2 MB in the beginning and 995.8 MB in the end (delta: -755.6 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 05:48:27,698 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.11 ms. Allocated memory is still 307.8 MB. Free memory is still 272.2 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 73.40 ms. Allocated memory is still 307.8 MB. Free memory was 256.2 MB in the beginning and 254.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 36.24 ms. Allocated memory is still 307.8 MB. Free memory was 254.2 MB in the beginning and 252.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 306.96 ms. Allocated memory is still 307.8 MB. Free memory was 252.2 MB in the beginning and 240.2 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 65360.28 ms. Allocated memory was 307.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 240.2 MB in the beginning and 995.8 MB in the end (delta: -755.6 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 1342 quantified variables from 12 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 65.2s OverallTime, 9 OverallIterations, 9 TraceHistogramMax, 2.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 56 SDtfs, 23 SDslu, 163 SDs, 0 SdLazy, 65 SolverSat, 53 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 156 GetRequests, 51 SyntacticMatches, 27 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 4.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=8, 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, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 56.1s InterpolantComputationTime, 161 NumberOfCodeBlocks, 161 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 146 ConstructedInterpolants, 0 QuantifiedInterpolants, 9375 SizeOfPredicates, 35 NumberOfNonLiveVariables, 1953 ConjunctsInSsa, 258 ConjunctsInUnsatCore, 15 InterpolantComputations, 1 PerfectInterpolantSequences, 0/168 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/NetBSD_loop_int.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_05-48-27-710.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/NetBSD_loop_int.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_05-48-27-710.csv Completed graceful shutdown