java -Xss4m -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/seq2.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 13:28:38,273 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 13:28:38,276 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 13:28:38,291 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 13:28:38,291 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 13:28:38,292 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 13:28:38,295 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 13:28:38,297 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 13:28:38,299 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 13:28:38,299 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 13:28:38,301 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 13:28:38,302 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 13:28:38,303 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 13:28:38,304 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 13:28:38,304 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 13:28:38,307 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 13:28:38,309 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 13:28:38,320 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 13:28:38,321 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 13:28:38,322 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 13:28:38,323 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 13:28:38,329 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 13:28:38,329 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 13:28:38,330 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 13:28:38,330 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 13:28:38,331 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 13:28:38,332 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 13:28:38,332 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 13:28:38,335 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 13:28:38,335 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 13:28:38,336 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 13:28:38,336 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 13:28:38,336 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 13:28:38,337 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 13:28:38,338 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 13:28:38,341 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 13:28:38,369 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 13:28:38,369 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 13:28:38,370 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 13:28:38,370 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 13:28:38,372 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 13:28:38,372 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 13:28:38,372 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 13:28:38,373 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 13:28:38,373 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 13:28:38,373 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 13:28:38,373 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 13:28:38,373 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 13:28:38,374 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 13:28:38,374 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 13:28:38,374 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 13:28:38,374 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 13:28:38,374 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 13:28:38,374 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 13:28:38,379 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 13:28:38,379 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 13:28:38,379 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 13:28:38,381 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 13:28:38,381 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 13:28:38,433 INFO ]: Repository-Root is: /tmp [2018-06-25 13:28:38,451 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 13:28:38,457 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 13:28:38,459 INFO ]: Initializing SmtParser... [2018-06-25 13:28:38,459 INFO ]: SmtParser initialized [2018-06-25 13:28:38,460 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/seq2.c.smt2 [2018-06-25 13:28:38,461 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 [2018-06-25 13:28:38,557 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/seq2.c.smt2 unknown [2018-06-25 13:28:38,901 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/seq2.c.smt2 [2018-06-25 13:28:38,907 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 13:28:38,915 INFO ]: Walking toolchain with 4 elements. [2018-06-25 13:28:38,916 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 13:28:38,916 INFO ]: Initializing ChcToBoogie... [2018-06-25 13:28:38,916 INFO ]: ChcToBoogie initialized [2018-06-25 13:28:38,919 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:28:38" (1/1) ... [2018-06-25 13:28:38,986 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:28:38 Unit [2018-06-25 13:28:38,986 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 13:28:38,987 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 13:28:38,987 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 13:28:38,987 INFO ]: Boogie Preprocessor initialized [2018-06-25 13:28:39,010 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:28:38" (1/1) ... [2018-06-25 13:28:39,010 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:28:38" (1/1) ... [2018-06-25 13:28:39,019 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:28:38" (1/1) ... [2018-06-25 13:28:39,019 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:28:38" (1/1) ... [2018-06-25 13:28:39,036 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:28:38" (1/1) ... [2018-06-25 13:28:39,038 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:28:38" (1/1) ... [2018-06-25 13:28:39,039 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:28:38" (1/1) ... [2018-06-25 13:28:39,041 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 13:28:39,051 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 13:28:39,051 INFO ]: Initializing RCFGBuilder... [2018-06-25 13:28:39,051 INFO ]: RCFGBuilder initialized [2018-06-25 13:28:39,052 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:28:38" (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) [2018-06-25 13:28:39,074 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 13:28:39,074 INFO ]: Found specification of procedure gotoProc [2018-06-25 13:28:39,074 INFO ]: Found implementation of procedure gotoProc [2018-06-25 13:28:39,074 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 13:28:39,074 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 13:28:39,074 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 [2018-06-25 13:28:39,379 INFO ]: Using library mode [2018-06-25 13:28:39,381 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:28:39 BoogieIcfgContainer [2018-06-25 13:28:39,382 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 13:28:39,383 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 13:28:39,383 INFO ]: Initializing TraceAbstraction... [2018-06-25 13:28:39,388 INFO ]: TraceAbstraction initialized [2018-06-25 13:28:39,388 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:28:38" (1/3) ... [2018-06-25 13:28:39,389 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26083546 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 01:28:39, skipping insertion in model container [2018-06-25 13:28:39,389 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:28:38" (2/3) ... [2018-06-25 13:28:39,389 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26083546 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 01:28:39, skipping insertion in model container [2018-06-25 13:28:39,389 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:28:39" (3/3) ... [2018-06-25 13:28:39,392 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 13:28:39,401 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 13:28:39,412 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 13:28:39,464 INFO ]: Using default assertion order modulation [2018-06-25 13:28:39,464 INFO ]: Interprodecural is true [2018-06-25 13:28:39,465 INFO ]: Hoare is false [2018-06-25 13:28:39,465 INFO ]: Compute interpolants for FPandBP [2018-06-25 13:28:39,465 INFO ]: Backedges is TWOTRACK [2018-06-25 13:28:39,465 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 13:28:39,465 INFO ]: Difference is false [2018-06-25 13:28:39,465 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 13:28:39,465 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 13:28:39,482 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 13:28:39,497 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 13:28:39,497 INFO ]: Found error trace [2018-06-25 13:28:39,498 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:28:39,498 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:28:39,504 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-25 13:28:39,506 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:28:39,507 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:28:39,548 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:28:39,548 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:28:39,548 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:28:39,607 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:28:39,693 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:28:39,696 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 13:28:39,696 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 13:28:39,698 INFO ]: Interpolant automaton has 3 states [2018-06-25 13:28:39,708 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 13:28:39,708 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 13:28:39,710 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 13:28:39,789 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:28:39,789 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 13:28:39,790 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 13:28:39,791 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 13:28:39,792 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:28:39,816 INFO ]: With dead ends: 9 [2018-06-25 13:28:39,816 INFO ]: Without dead ends: 9 [2018-06-25 13:28:39,818 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 [2018-06-25 13:28:39,836 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 13:28:39,855 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 13:28:39,858 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 13:28:39,859 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 13:28:39,860 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 13:28:39,860 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:28:39,860 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 13:28:39,860 INFO ]: Interpolant automaton has 3 states. [2018-06-25 13:28:39,860 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 13:28:39,861 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 13:28:39,861 INFO ]: Found error trace [2018-06-25 13:28:39,861 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:28:39,861 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:28:39,861 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-25 13:28:39,861 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:28:39,861 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:28:39,863 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:28:39,863 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:28:39,863 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:28:39,931 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:28:40,131 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:28:40,131 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:28:40,131 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 [2018-06-25 13:28:40,139 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:28:40,204 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:28:40,215 INFO ]: Computing forward predicates... [2018-06-25 13:28:40,444 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:28:40,475 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:28:40,475 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-06-25 13:28:40,475 INFO ]: Interpolant automaton has 4 states [2018-06-25 13:28:40,476 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-25 13:28:40,476 INFO ]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-25 13:28:40,476 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 4 states. [2018-06-25 13:28:40,555 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:28:40,555 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-25 13:28:40,556 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-25 13:28:40,556 INFO ]: Start accepts. Automaton has 4 states. Word has length 8 [2018-06-25 13:28:40,556 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:28:40,557 INFO ]: With dead ends: 10 [2018-06-25 13:28:40,557 INFO ]: Without dead ends: 10 [2018-06-25 13:28:40,558 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-25 13:28:40,558 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-25 13:28:40,559 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-25 13:28:40,559 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-25 13:28:40,559 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-25 13:28:40,559 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-25 13:28:40,559 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:28:40,559 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-25 13:28:40,559 INFO ]: Interpolant automaton has 4 states. [2018-06-25 13:28:40,560 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-25 13:28:40,560 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-25 13:28:40,560 INFO ]: Found error trace [2018-06-25 13:28:40,560 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:28:40,560 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:28:40,560 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-25 13:28:40,560 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:28:40,560 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:28:40,562 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:28:40,562 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:28:40,563 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:28:40,658 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:28:41,092 WARN ]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-25 13:28:41,093 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:28:41,093 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:28:41,093 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 [2018-06-25 13:28:41,107 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 13:28:41,180 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 13:28:41,180 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:28:41,183 INFO ]: Computing forward predicates... [2018-06-25 13:28:44,211 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:28:44,231 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:28:44,231 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-25 13:28:44,231 INFO ]: Interpolant automaton has 6 states [2018-06-25 13:28:44,232 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 13:28:44,232 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-25 13:28:44,232 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-25 13:28:44,328 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:28:44,328 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-25 13:28:44,329 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-25 13:28:44,329 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-25 13:28:44,329 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:28:44,329 INFO ]: With dead ends: 11 [2018-06-25 13:28:44,329 INFO ]: Without dead ends: 11 [2018-06-25 13:28:44,329 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-06-25 13:28:44,329 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-25 13:28:44,330 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-25 13:28:44,330 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-25 13:28:44,330 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-25 13:28:44,330 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-25 13:28:44,330 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:28:44,330 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-25 13:28:44,330 INFO ]: Interpolant automaton has 6 states. [2018-06-25 13:28:44,331 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-25 13:28:44,331 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-25 13:28:44,331 INFO ]: Found error trace [2018-06-25 13:28:44,331 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:28:44,331 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:28:44,331 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 3 times [2018-06-25 13:28:44,331 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:28:44,331 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:28:44,332 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:28:44,332 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:28:44,332 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:28:44,381 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:28:44,524 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:28:44,524 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:28:44,524 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 [2018-06-25 13:28:44,543 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 13:28:44,628 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 13:28:44,628 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:28:44,631 INFO ]: Computing forward predicates... [2018-06-25 13:28:48,391 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:28:48,428 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:28:48,428 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-06-25 13:28:48,428 INFO ]: Interpolant automaton has 6 states [2018-06-25 13:28:48,428 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 13:28:48,428 INFO ]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-06-25 13:28:48,428 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-06-25 13:28:48,764 WARN ]: Spent 271.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 11 [2018-06-25 13:28:48,877 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:28:48,877 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-25 13:28:48,877 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-25 13:28:48,877 INFO ]: Start accepts. Automaton has 6 states. Word has length 10 [2018-06-25 13:28:48,877 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:28:48,878 INFO ]: With dead ends: 12 [2018-06-25 13:28:48,878 INFO ]: Without dead ends: 12 [2018-06-25 13:28:48,878 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-06-25 13:28:48,878 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-25 13:28:48,879 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-25 13:28:48,880 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-25 13:28:48,880 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-25 13:28:48,880 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-25 13:28:48,880 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:28:48,880 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-25 13:28:48,880 INFO ]: Interpolant automaton has 6 states. [2018-06-25 13:28:48,880 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-25 13:28:48,882 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-25 13:28:48,882 INFO ]: Found error trace [2018-06-25 13:28:48,882 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:28:48,882 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:28:48,882 INFO ]: Analyzing trace with hash 201204236, now seen corresponding path program 4 times [2018-06-25 13:28:48,882 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:28:48,882 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:28:48,883 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:28:48,883 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:28:48,883 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:28:48,953 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:28:49,275 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:28:49,276 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:28:49,276 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 [2018-06-25 13:28:49,291 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-25 13:28:49,348 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-25 13:28:49,349 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:28:49,352 INFO ]: Computing forward predicates... [2018-06-25 13:28:53,190 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:28:53,771 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:28:53,792 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:28:53,792 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-06-25 13:28:53,792 INFO ]: Interpolant automaton has 8 states [2018-06-25 13:28:53,793 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-25 13:28:53,793 INFO ]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-06-25 13:28:53,793 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 8 states. [2018-06-25 13:28:54,013 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:28:54,013 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-25 13:28:54,013 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-25 13:28:54,013 INFO ]: Start accepts. Automaton has 8 states. Word has length 11 [2018-06-25 13:28:54,013 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:28:54,013 INFO ]: With dead ends: 13 [2018-06-25 13:28:54,013 INFO ]: Without dead ends: 13 [2018-06-25 13:28:54,014 INFO ]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-06-25 13:28:54,014 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-25 13:28:54,015 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-25 13:28:54,015 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-25 13:28:54,016 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-25 13:28:54,016 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-25 13:28:54,016 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:28:54,016 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-25 13:28:54,016 INFO ]: Interpolant automaton has 8 states. [2018-06-25 13:28:54,016 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-25 13:28:54,016 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-25 13:28:54,016 INFO ]: Found error trace [2018-06-25 13:28:54,016 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:28:54,016 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:28:54,017 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 5 times [2018-06-25 13:28:54,017 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:28:54,017 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:28:54,017 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:28:54,017 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:28:54,017 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:28:54,083 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:28:54,622 WARN ]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-25 13:28:55,104 WARN ]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-25 13:28:55,221 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:28:55,221 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:28:55,221 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 [2018-06-25 13:28:55,230 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-25 13:28:55,287 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-25 13:28:55,288 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:28:55,292 INFO ]: Computing forward predicates... [2018-06-25 13:29:01,674 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:29:01,694 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:29:01,694 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2018-06-25 13:29:01,694 INFO ]: Interpolant automaton has 10 states [2018-06-25 13:29:01,694 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-25 13:29:01,695 INFO ]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-06-25 13:29:01,695 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 10 states. [2018-06-25 13:29:01,867 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:29:01,867 INFO ]: Finished difference Result 14 states and 14 transitions. [2018-06-25 13:29:01,867 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-25 13:29:01,867 INFO ]: Start accepts. Automaton has 10 states. Word has length 12 [2018-06-25 13:29:01,867 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:29:01,868 INFO ]: With dead ends: 14 [2018-06-25 13:29:01,868 INFO ]: Without dead ends: 14 [2018-06-25 13:29:01,868 INFO ]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2018-06-25 13:29:01,868 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-25 13:29:01,869 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-06-25 13:29:01,869 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-25 13:29:01,870 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-06-25 13:29:01,870 INFO ]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-06-25 13:29:01,870 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:29:01,870 INFO ]: Abstraction has 14 states and 14 transitions. [2018-06-25 13:29:01,870 INFO ]: Interpolant automaton has 10 states. [2018-06-25 13:29:01,870 INFO ]: Start isEmpty. Operand 14 states and 14 transitions. [2018-06-25 13:29:01,870 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-25 13:29:01,870 INFO ]: Found error trace [2018-06-25 13:29:01,870 INFO ]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:29:01,871 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:29:01,871 INFO ]: Analyzing trace with hash 23503628, now seen corresponding path program 6 times [2018-06-25 13:29:01,871 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:29:01,871 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:29:01,871 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:29:01,871 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:29:01,871 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:29:01,974 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:29:02,288 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:29:02,288 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:29:02,288 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:29:02,294 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-25 13:29:02,373 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-06-25 13:29:02,373 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:29:02,377 INFO ]: Computing forward predicates... [2018-06-25 13:29:03,796 WARN ]: expecting exponential blowup for input size 10 [2018-06-25 13:29:13,765 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:29:24,214 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:29:24,226 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:29:28,936 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 13:29:30,359 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:29:33,895 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:29:33,928 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:29:33,929 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2018-06-25 13:29:33,929 INFO ]: Interpolant automaton has 11 states [2018-06-25 13:29:33,929 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-25 13:29:33,929 INFO ]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-06-25 13:29:33,929 INFO ]: Start difference. First operand 14 states and 14 transitions. Second operand 11 states. [2018-06-25 13:29:34,192 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:29:34,192 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-25 13:29:34,192 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-25 13:29:34,192 INFO ]: Start accepts. Automaton has 11 states. Word has length 13 [2018-06-25 13:29:34,193 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:29:34,193 INFO ]: With dead ends: 15 [2018-06-25 13:29:34,193 INFO ]: Without dead ends: 15 [2018-06-25 13:29:34,193 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2018-06-25 13:29:34,193 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-25 13:29:34,194 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-25 13:29:34,195 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-25 13:29:34,195 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-06-25 13:29:34,195 INFO ]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-06-25 13:29:34,195 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:29:34,195 INFO ]: Abstraction has 15 states and 15 transitions. [2018-06-25 13:29:34,195 INFO ]: Interpolant automaton has 11 states. [2018-06-25 13:29:34,195 INFO ]: Start isEmpty. Operand 15 states and 15 transitions. [2018-06-25 13:29:34,195 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-25 13:29:34,195 INFO ]: Found error trace [2018-06-25 13:29:34,195 INFO ]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:29:34,196 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:29:34,196 INFO ]: Analyzing trace with hash 726730004, now seen corresponding path program 7 times [2018-06-25 13:29:34,196 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:29:34,196 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:29:34,196 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:29:34,196 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:29:34,196 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:29:34,317 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:29:34,682 WARN ]: Spent 131.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2018-06-25 13:29:34,872 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:29:34,872 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:29:34,872 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 [2018-06-25 13:29:34,883 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:29:34,961 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:29:34,967 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-25 13:29:42,259 INFO ]: Timeout while computing interpolants [2018-06-25 13:29:42,460 WARN ]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:29:42,460 WARN ]: Verification canceled [2018-06-25 13:29:42,465 WARN ]: Timeout [2018-06-25 13:29:42,465 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 01:29:42 BoogieIcfgContainer [2018-06-25 13:29:42,465 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 13:29:42,466 INFO ]: Toolchain (without parser) took 63558.12 ms. Allocated memory was 302.0 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 250.4 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 13:29:42,467 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 302.0 MB. Free memory is still 266.5 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 13:29:42,467 INFO ]: ChcToBoogie took 71.25 ms. Allocated memory is still 302.0 MB. Free memory was 250.4 MB in the beginning and 248.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:29:42,467 INFO ]: Boogie Preprocessor took 54.20 ms. Allocated memory is still 302.0 MB. Free memory was 248.4 MB in the beginning and 246.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:29:42,468 INFO ]: RCFGBuilder took 330.55 ms. Allocated memory is still 302.0 MB. Free memory was 246.4 MB in the beginning and 234.5 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:29:42,468 INFO ]: TraceAbstraction took 63082.09 ms. Allocated memory was 302.0 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 234.5 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 13:29:42,476 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 302.0 MB. Free memory is still 266.5 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 71.25 ms. Allocated memory is still 302.0 MB. Free memory was 250.4 MB in the beginning and 248.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 54.20 ms. Allocated memory is still 302.0 MB. Free memory was 248.4 MB in the beginning and 246.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 330.55 ms. Allocated memory is still 302.0 MB. Free memory was 246.4 MB in the beginning and 234.5 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 63082.09 ms. Allocated memory was 302.0 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 234.5 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). 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 15 with TraceHistMax 7, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while DnfTransformerHelper was transforming 0 conjuction. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 63.0s OverallTime, 8 OverallIterations, 7 TraceHistogramMax, 1.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 49 SDtfs, 15 SDslu, 139 SDs, 0 SdLazy, 54 SolverSat, 35 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 121 GetRequests, 47 SyntacticMatches, 18 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred 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: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 51.9s InterpolantComputationTime, 133 NumberOfCodeBlocks, 133 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 120 ConstructedInterpolants, 0 QuantifiedInterpolants, 6569 SizeOfPredicates, 30 NumberOfNonLiveVariables, 1443 ConjunctsInSsa, 207 ConjunctsInUnsatCore, 13 InterpolantComputations, 1 PerfectInterpolantSequences, 0/112 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/seq2.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-25_13-29-42-495.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/seq2.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_13-29-42-495.csv Completed graceful shutdown