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_No_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/ctigar/NetBSD_g_Ctoc.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 15:24:47,322 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 15:24:47,324 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 15:24:47,335 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 15:24:47,335 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 15:24:47,337 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 15:24:47,340 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 15:24:47,342 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 15:24:47,344 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 15:24:47,344 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 15:24:47,346 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 15:24:47,346 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 15:24:47,347 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 15:24:47,348 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 15:24:47,349 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 15:24:47,349 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 15:24:47,351 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 15:24:47,353 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 15:24:47,354 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 15:24:47,355 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 15:24:47,356 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 15:24:47,359 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 15:24:47,359 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 15:24:47,359 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 15:24:47,360 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 15:24:47,361 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 15:24:47,362 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 15:24:47,362 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 15:24:47,363 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 15:24:47,364 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 15:24:47,364 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 15:24:47,365 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 15:24:47,365 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 15:24:47,366 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 15:24:47,367 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 15:24:47,367 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 15:24:47,380 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 15:24:47,380 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 15:24:47,381 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 15:24:47,381 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 15:24:47,382 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 15:24:47,382 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 15:24:47,382 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 15:24:47,383 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 15:24:47,383 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 15:24:47,383 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 15:24:47,383 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:24:47,383 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 15:24:47,384 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 15:24:47,384 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 15:24:47,384 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 15:24:47,384 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 15:24:47,384 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 15:24:47,385 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 15:24:47,385 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 15:24:47,386 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 15:24:47,386 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 15:24:47,423 INFO ]: Repository-Root is: /tmp [2018-06-22 15:24:47,439 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 15:24:47,442 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 15:24:47,444 INFO ]: Initializing SmtParser... [2018-06-22 15:24:47,444 INFO ]: SmtParser initialized [2018-06-22 15:24:47,445 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/NetBSD_g_Ctoc.c.smt2 [2018-06-22 15:24:47,446 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 15:24:47,537 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/NetBSD_g_Ctoc.c.smt2 unknown [2018-06-22 15:24:47,871 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/NetBSD_g_Ctoc.c.smt2 [2018-06-22 15:24:47,876 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 15:24:47,882 INFO ]: Walking toolchain with 4 elements. [2018-06-22 15:24:47,883 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 15:24:47,883 INFO ]: Initializing ChcToBoogie... [2018-06-22 15:24:47,883 INFO ]: ChcToBoogie initialized [2018-06-22 15:24:47,886 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:24:47" (1/1) ... [2018-06-22 15:24:47,933 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:24:47 Unit [2018-06-22 15:24:47,934 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 15:24:47,934 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 15:24:47,934 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 15:24:47,934 INFO ]: Boogie Preprocessor initialized [2018-06-22 15:24:47,951 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:24:47" (1/1) ... [2018-06-22 15:24:47,951 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:24:47" (1/1) ... [2018-06-22 15:24:47,958 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:24:47" (1/1) ... [2018-06-22 15:24:47,958 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:24:47" (1/1) ... [2018-06-22 15:24:47,967 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:24:47" (1/1) ... [2018-06-22 15:24:47,968 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:24:47" (1/1) ... [2018-06-22 15:24:47,970 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:24:47" (1/1) ... [2018-06-22 15:24:47,973 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 15:24:47,974 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 15:24:47,974 INFO ]: Initializing RCFGBuilder... [2018-06-22 15:24:47,974 INFO ]: RCFGBuilder initialized [2018-06-22 15:24:47,975 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:24:47" (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 15:24:47,988 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 15:24:47,988 INFO ]: Found specification of procedure False [2018-06-22 15:24:47,988 INFO ]: Found implementation of procedure False [2018-06-22 15:24:47,988 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 15:24:47,988 INFO ]: Found specification of procedure state [2018-06-22 15:24:47,988 INFO ]: Found implementation of procedure state [2018-06-22 15:24:47,988 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 15:24:47,988 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 15:24:47,988 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 15:24:48,260 INFO ]: Using library mode [2018-06-22 15:24:48,261 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:24:48 BoogieIcfgContainer [2018-06-22 15:24:48,261 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 15:24:48,262 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 15:24:48,262 INFO ]: Initializing TraceAbstraction... [2018-06-22 15:24:48,270 INFO ]: TraceAbstraction initialized [2018-06-22 15:24:48,270 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:24:47" (1/3) ... [2018-06-22 15:24:48,271 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c39d39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 03:24:48, skipping insertion in model container [2018-06-22 15:24:48,271 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:24:47" (2/3) ... [2018-06-22 15:24:48,271 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c39d39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 03:24:48, skipping insertion in model container [2018-06-22 15:24:48,271 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:24:48" (3/3) ... [2018-06-22 15:24:48,274 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 15:24:48,283 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 15:24:48,290 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 15:24:48,326 INFO ]: Using default assertion order modulation [2018-06-22 15:24:48,326 INFO ]: Interprodecural is true [2018-06-22 15:24:48,326 INFO ]: Hoare is false [2018-06-22 15:24:48,326 INFO ]: Compute interpolants for FPandBP [2018-06-22 15:24:48,327 INFO ]: Backedges is TWOTRACK [2018-06-22 15:24:48,327 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 15:24:48,327 INFO ]: Difference is false [2018-06-22 15:24:48,327 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 15:24:48,327 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 15:24:48,340 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 15:24:48,350 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 15:24:48,350 INFO ]: Found error trace [2018-06-22 15:24:48,351 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:24:48,351 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:24:48,358 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 15:24:48,360 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:24:48,361 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:24:48,395 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:24:48,395 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:24:48,395 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:24:48,434 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:24:48,691 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 15:24:48,693 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 15:24:48,693 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 15:24:48,694 INFO ]: Interpolant automaton has 4 states [2018-06-22 15:24:48,709 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 15:24:48,710 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:24:48,712 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 15:24:48,800 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:24:48,800 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 15:24:48,801 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 15:24:48,802 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 15:24:48,802 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:24:48,810 INFO ]: With dead ends: 13 [2018-06-22 15:24:48,810 INFO ]: Without dead ends: 13 [2018-06-22 15:24:48,812 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:24:48,825 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 15:24:48,843 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 15:24:48,844 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 15:24:48,845 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 15:24:48,845 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 15:24:48,846 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:24:48,846 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 15:24:48,846 INFO ]: Interpolant automaton has 4 states. [2018-06-22 15:24:48,846 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 15:24:48,847 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 15:24:48,847 INFO ]: Found error trace [2018-06-22 15:24:48,847 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:24:48,847 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:24:48,847 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 15:24:48,847 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:24:48,847 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:24:48,848 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:24:48,848 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:24:48,848 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:24:48,911 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:24:49,332 WARN ]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-06-22 15:24:49,558 WARN ]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-22 15:24:49,633 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:24:49,633 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:24:49,634 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 15:24:49,649 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:24:49,699 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:24:49,710 INFO ]: Computing forward predicates... [2018-06-22 15:24:50,426 WARN ]: Spent 508.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2018-06-22 15:24:50,823 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:24:50,843 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:24:50,843 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 15:24:50,844 INFO ]: Interpolant automaton has 9 states [2018-06-22 15:24:50,844 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 15:24:50,844 INFO ]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-06-22 15:24:50,844 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 15:24:51,578 WARN ]: Spent 592.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2018-06-22 15:24:51,708 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:24:51,708 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 15:24:51,708 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 15:24:51,708 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 15:24:51,709 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:24:51,709 INFO ]: With dead ends: 15 [2018-06-22 15:24:51,709 INFO ]: Without dead ends: 15 [2018-06-22 15:24:51,710 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-06-22 15:24:51,710 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 15:24:51,713 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 15:24:51,713 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 15:24:51,713 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 15:24:51,713 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 15:24:51,714 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:24:51,714 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 15:24:51,714 INFO ]: Interpolant automaton has 9 states. [2018-06-22 15:24:51,714 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 15:24:51,714 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 15:24:51,714 INFO ]: Found error trace [2018-06-22 15:24:51,714 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:24:51,714 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:24:51,714 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 15:24:51,714 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:24:51,715 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:24:51,715 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:24:51,715 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:24:51,715 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:24:51,764 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:24:52,055 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:24:52,055 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:24:52,055 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 15:24:52,069 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:24:52,122 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:24:52,122 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:24:52,125 INFO ]: Computing forward predicates... [2018-06-22 15:24:52,619 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:24:52,639 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:24:52,639 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-06-22 15:24:52,639 INFO ]: Interpolant automaton has 11 states [2018-06-22 15:24:52,639 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-22 15:24:52,639 INFO ]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-06-22 15:24:52,640 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-06-22 15:24:52,942 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:24:52,942 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 15:24:52,942 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 15:24:52,942 INFO ]: Start accepts. Automaton has 11 states. Word has length 17 [2018-06-22 15:24:52,942 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:24:52,943 INFO ]: With dead ends: 17 [2018-06-22 15:24:52,943 INFO ]: Without dead ends: 17 [2018-06-22 15:24:52,943 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2018-06-22 15:24:52,943 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 15:24:52,946 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 15:24:52,946 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 15:24:52,947 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 15:24:52,947 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 15:24:52,947 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:24:52,947 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 15:24:52,947 INFO ]: Interpolant automaton has 11 states. [2018-06-22 15:24:52,947 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 15:24:52,948 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 15:24:52,948 INFO ]: Found error trace [2018-06-22 15:24:52,948 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:24:52,948 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:24:52,948 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 15:24:52,948 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:24:52,948 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:24:52,949 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:24:52,949 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:24:52,949 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:24:52,993 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:24:53,430 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:24:53,430 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:24:53,430 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 15:24:53,444 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 15:24:53,504 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 15:24:53,504 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:24:53,508 INFO ]: Computing forward predicates... [2018-06-22 15:24:54,038 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:24:54,072 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:24:54,072 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2018-06-22 15:24:54,072 INFO ]: Interpolant automaton has 16 states [2018-06-22 15:24:54,072 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 15:24:54,072 INFO ]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2018-06-22 15:24:54,073 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 16 states. [2018-06-22 15:24:54,628 WARN ]: Spent 296.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2018-06-22 15:24:54,881 WARN ]: Spent 113.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2018-06-22 15:24:55,078 WARN ]: Spent 176.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2018-06-22 15:24:55,124 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:24:55,124 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 15:24:55,126 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 15:24:55,126 INFO ]: Start accepts. Automaton has 16 states. Word has length 21 [2018-06-22 15:24:55,126 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:24:55,126 INFO ]: With dead ends: 19 [2018-06-22 15:24:55,126 INFO ]: Without dead ends: 19 [2018-06-22 15:24:55,127 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2018-06-22 15:24:55,127 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 15:24:55,129 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 15:24:55,129 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 15:24:55,130 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 15:24:55,130 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 15:24:55,130 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:24:55,130 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 15:24:55,130 INFO ]: Interpolant automaton has 16 states. [2018-06-22 15:24:55,130 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 15:24:55,131 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 15:24:55,131 INFO ]: Found error trace [2018-06-22 15:24:55,131 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:24:55,131 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:24:55,131 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-22 15:24:55,131 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:24:55,131 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:24:55,132 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:24:55,132 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:24:55,132 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:24:55,175 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:24:55,577 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:24:55,578 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:24:55,578 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 15:24:55,583 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 15:24:55,624 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 15:24:55,625 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:24:55,629 INFO ]: Computing forward predicates... [2018-06-22 15:24:55,801 WARN ]: Spent 120.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2018-06-22 15:24:56,154 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:24:56,173 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:24:56,173 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2018-06-22 15:24:56,173 INFO ]: Interpolant automaton has 18 states [2018-06-22 15:24:56,173 INFO ]: Constructing interpolant automaton starting with 18 interpolants. [2018-06-22 15:24:56,174 INFO ]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2018-06-22 15:24:56,174 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 18 states. [2018-06-22 15:24:56,552 WARN ]: Spent 330.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2018-06-22 15:24:56,823 WARN ]: Spent 245.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 34 [2018-06-22 15:24:57,225 WARN ]: Spent 271.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2018-06-22 15:24:57,445 WARN ]: Spent 177.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 33 [2018-06-22 15:24:57,955 WARN ]: Spent 486.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2018-06-22 15:24:57,994 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:24:57,994 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 15:24:57,995 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 15:24:57,995 INFO ]: Start accepts. Automaton has 18 states. Word has length 25 [2018-06-22 15:24:57,995 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:24:57,996 INFO ]: With dead ends: 21 [2018-06-22 15:24:57,996 INFO ]: Without dead ends: 21 [2018-06-22 15:24:57,996 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2018-06-22 15:24:57,996 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 15:24:58,005 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 15:24:58,005 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 15:24:58,006 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 15:24:58,006 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 15:24:58,006 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:24:58,006 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 15:24:58,006 INFO ]: Interpolant automaton has 18 states. [2018-06-22 15:24:58,006 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 15:24:58,007 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 15:24:58,007 INFO ]: Found error trace [2018-06-22 15:24:58,007 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:24:58,007 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:24:58,007 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 5 times [2018-06-22 15:24:58,007 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:24:58,007 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:24:58,008 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:24:58,008 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:24:58,008 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:24:58,110 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:24:58,402 WARN ]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 15:24:59,486 WARN ]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 23 [2018-06-22 15:24:59,732 WARN ]: Spent 177.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2018-06-22 15:24:59,874 WARN ]: Spent 117.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2018-06-22 15:25:00,185 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:25:00,186 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:25:00,186 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 15:25:00,192 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 15:25:00,256 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 15:25:00,256 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:25:00,260 INFO ]: Computing forward predicates... [2018-06-22 15:25:00,461 WARN ]: Spent 105.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2018-06-22 15:25:01,468 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:25:01,496 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:25:01,496 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2018-06-22 15:25:01,496 INFO ]: Interpolant automaton has 25 states [2018-06-22 15:25:01,496 INFO ]: Constructing interpolant automaton starting with 25 interpolants. [2018-06-22 15:25:01,497 INFO ]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2018-06-22 15:25:01,497 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 25 states. [2018-06-22 15:25:01,851 WARN ]: Spent 290.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2018-06-22 15:25:02,015 WARN ]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 37 [2018-06-22 15:25:02,291 WARN ]: Spent 246.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2018-06-22 15:25:02,565 WARN ]: Spent 214.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2018-06-22 15:25:03,038 WARN ]: Spent 330.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 43 [2018-06-22 15:25:03,249 WARN ]: Spent 180.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 41 [2018-06-22 15:25:03,280 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:25:03,280 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 15:25:03,281 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 15:25:03,281 INFO ]: Start accepts. Automaton has 25 states. Word has length 29 [2018-06-22 15:25:03,281 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:25:03,282 INFO ]: With dead ends: 23 [2018-06-22 15:25:03,282 INFO ]: Without dead ends: 23 [2018-06-22 15:25:03,282 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2018-06-22 15:25:03,282 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 15:25:03,285 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 15:25:03,285 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 15:25:03,286 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 15:25:03,286 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 15:25:03,286 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:25:03,286 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 15:25:03,286 INFO ]: Interpolant automaton has 25 states. [2018-06-22 15:25:03,286 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 15:25:03,287 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 15:25:03,287 INFO ]: Found error trace [2018-06-22 15:25:03,287 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:25:03,287 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:25:03,287 INFO ]: Analyzing trace with hash -1661294575, now seen corresponding path program 6 times [2018-06-22 15:25:03,287 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:25:03,287 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:25:03,288 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:25:03,288 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:25:03,288 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:25:03,375 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:25:03,679 WARN ]: Spent 140.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 7 [2018-06-22 15:25:03,888 WARN ]: Spent 152.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2018-06-22 15:25:04,034 WARN ]: Spent 140.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2018-06-22 15:25:04,378 WARN ]: Spent 122.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2018-06-22 15:25:04,833 WARN ]: Spent 118.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2018-06-22 15:25:04,925 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:25:04,925 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:25:04,925 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 15:25:04,944 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 15:25:05,028 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-22 15:25:05,028 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:25:05,035 INFO ]: Computing forward predicates... [2018-06-22 15:25:06,560 WARN ]: Spent 1.06 s on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2018-06-22 15:25:07,131 WARN ]: Spent 254.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2018-06-22 15:25:07,305 WARN ]: Spent 132.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2018-06-22 15:25:09,577 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:25:09,606 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:25:09,606 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2018-06-22 15:25:09,606 INFO ]: Interpolant automaton has 26 states [2018-06-22 15:25:09,606 INFO ]: Constructing interpolant automaton starting with 26 interpolants. [2018-06-22 15:25:09,607 INFO ]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2018-06-22 15:25:09,607 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 26 states. [2018-06-22 15:25:10,323 WARN ]: Spent 626.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2018-06-22 15:25:10,565 WARN ]: Spent 194.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 38 [2018-06-22 15:25:10,884 WARN ]: Spent 276.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 46 [2018-06-22 15:25:11,386 WARN ]: Spent 473.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2018-06-22 15:25:11,829 WARN ]: Spent 411.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 47 [2018-06-22 15:25:12,032 WARN ]: Spent 176.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 43 [2018-06-22 15:25:12,344 WARN ]: Spent 280.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 46 [2018-06-22 15:25:12,382 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:25:12,382 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 15:25:12,385 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 15:25:12,385 INFO ]: Start accepts. Automaton has 26 states. Word has length 33 [2018-06-22 15:25:12,385 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:25:12,386 INFO ]: With dead ends: 25 [2018-06-22 15:25:12,386 INFO ]: Without dead ends: 25 [2018-06-22 15:25:12,387 INFO ]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2018-06-22 15:25:12,387 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 15:25:12,391 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 15:25:12,391 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 15:25:12,392 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 15:25:12,392 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 33 [2018-06-22 15:25:12,392 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:25:12,392 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 15:25:12,392 INFO ]: Interpolant automaton has 26 states. [2018-06-22 15:25:12,392 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 15:25:12,393 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 15:25:12,393 INFO ]: Found error trace [2018-06-22 15:25:12,393 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:25:12,393 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:25:12,393 INFO ]: Analyzing trace with hash -1494134477, now seen corresponding path program 7 times [2018-06-22 15:25:12,393 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:25:12,393 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:25:12,394 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:25:12,394 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:25:12,394 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:25:12,456 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:25:12,776 WARN ]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 15:25:13,268 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:25:13,268 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:25:13,268 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 15:25:13,274 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:25:13,343 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:25:13,349 INFO ]: Computing forward predicates... [2018-06-22 15:25:13,699 WARN ]: Spent 159.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2018-06-22 15:25:13,957 WARN ]: Spent 156.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 Received shutdown request... [2018-06-22 15:25:50,181 INFO ]: Timeout while computing interpolants [2018-06-22 15:25:50,381 WARN ]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:25:50,381 WARN ]: Verification canceled [2018-06-22 15:25:50,385 WARN ]: Timeout [2018-06-22 15:25:50,385 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 03:25:50 BoogieIcfgContainer [2018-06-22 15:25:50,385 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 15:25:50,386 INFO ]: Toolchain (without parser) took 62509.77 ms. Allocated memory was 307.8 MB in the beginning and 1.7 GB in the end (delta: 1.4 GB). Free memory was 257.3 MB in the beginning and 1.5 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.4 GB. Max. memory is 3.6 GB. [2018-06-22 15:25:50,388 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 307.8 MB. Free memory is still 273.4 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 15:25:50,388 INFO ]: ChcToBoogie took 51.09 ms. Allocated memory is still 307.8 MB. Free memory was 256.3 MB in the beginning and 254.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:25:50,389 INFO ]: Boogie Preprocessor took 39.25 ms. Allocated memory is still 307.8 MB. Free memory was 254.3 MB in the beginning and 253.3 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-22 15:25:50,389 INFO ]: RCFGBuilder took 286.87 ms. Allocated memory is still 307.8 MB. Free memory was 253.3 MB in the beginning and 241.3 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:25:50,390 INFO ]: TraceAbstraction took 62122.89 ms. Allocated memory was 307.8 MB in the beginning and 1.7 GB in the end (delta: 1.4 GB). Free memory was 241.3 MB in the beginning and 1.5 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.4 GB. Max. memory is 3.6 GB. [2018-06-22 15:25:50,397 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 307.8 MB. Free memory is still 273.4 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 51.09 ms. Allocated memory is still 307.8 MB. Free memory was 256.3 MB in the beginning and 254.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 39.25 ms. Allocated memory is still 307.8 MB. Free memory was 254.3 MB in the beginning and 253.3 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 286.87 ms. Allocated memory is still 307.8 MB. Free memory was 253.3 MB in the beginning and 241.3 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 62122.89 ms. Allocated memory was 307.8 MB in the beginning and 1.7 GB in the end (delta: 1.4 GB). Free memory was 241.3 MB in the beginning and 1.5 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.4 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 38 with TraceHistMax 8, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 2 quantified variables from 15 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 62.0s OverallTime, 8 OverallIterations, 8 TraceHistogramMax, 8.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 87 SDtfs, 188 SDslu, 576 SDs, 0 SdLazy, 462 SolverSat, 242 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 234 GetRequests, 104 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 17.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred 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, 0.6s SatisfiabilityAnalysisTime, 14.1s InterpolantComputationTime, 285 NumberOfCodeBlocks, 285 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 272 ConstructedInterpolants, 0 QuantifiedInterpolants, 114764 SizeOfPredicates, 330 NumberOfNonLiveVariables, 1521 ConjunctsInSsa, 236 ConjunctsInUnsatCore, 13 InterpolantComputations, 1 PerfectInterpolantSequences, 112/406 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_g_Ctoc.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_15-25-50-414.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/NetBSD_g_Ctoc.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_15-25-50-414.csv Completed graceful shutdown