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/lustre/durationThm_3_e3_442_e6_113.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 17:24:10,554 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 17:24:10,556 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 17:24:10,568 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 17:24:10,569 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 17:24:10,570 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 17:24:10,571 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 17:24:10,572 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 17:24:10,574 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 17:24:10,575 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 17:24:10,577 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 17:24:10,577 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 17:24:10,578 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 17:24:10,579 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 17:24:10,583 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 17:24:10,584 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 17:24:10,585 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 17:24:10,596 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 17:24:10,597 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 17:24:10,598 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 17:24:10,599 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 17:24:10,601 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 17:24:10,601 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 17:24:10,602 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 17:24:10,602 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 17:24:10,603 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 17:24:10,604 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 17:24:10,609 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 17:24:10,610 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 17:24:10,610 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 17:24:10,610 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 17:24:10,611 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 17:24:10,611 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 17:24:10,613 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 17:24:10,614 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 17:24:10,614 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 17:24:10,627 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 17:24:10,627 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 17:24:10,628 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 17:24:10,628 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 17:24:10,629 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 17:24:10,629 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 17:24:10,629 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 17:24:10,629 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 17:24:10,630 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 17:24:10,630 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 17:24:10,631 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 17:24:10,631 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 17:24:10,631 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 17:24:10,631 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 17:24:10,631 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 17:24:10,632 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 17:24:10,632 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 17:24:10,632 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 17:24:10,632 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 17:24:10,634 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 17:24:10,634 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 17:24:10,682 INFO ]: Repository-Root is: /tmp [2018-06-22 17:24:10,700 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 17:24:10,706 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 17:24:10,707 INFO ]: Initializing SmtParser... [2018-06-22 17:24:10,708 INFO ]: SmtParser initialized [2018-06-22 17:24:10,709 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/durationThm_3_e3_442_e6_113.smt2 [2018-06-22 17:24:10,710 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 17:24:10,799 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/durationThm_3_e3_442_e6_113.smt2 unknown [2018-06-22 17:24:11,076 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/durationThm_3_e3_442_e6_113.smt2 [2018-06-22 17:24:11,086 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 17:24:11,092 INFO ]: Walking toolchain with 4 elements. [2018-06-22 17:24:11,093 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 17:24:11,093 INFO ]: Initializing ChcToBoogie... [2018-06-22 17:24:11,102 INFO ]: ChcToBoogie initialized [2018-06-22 17:24:11,105 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:24:11" (1/1) ... [2018-06-22 17:24:11,150 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:24:11 Unit [2018-06-22 17:24:11,150 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 17:24:11,151 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 17:24:11,151 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 17:24:11,151 INFO ]: Boogie Preprocessor initialized [2018-06-22 17:24:11,172 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:24:11" (1/1) ... [2018-06-22 17:24:11,172 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:24:11" (1/1) ... [2018-06-22 17:24:11,179 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:24:11" (1/1) ... [2018-06-22 17:24:11,180 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:24:11" (1/1) ... [2018-06-22 17:24:11,182 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:24:11" (1/1) ... [2018-06-22 17:24:11,184 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:24:11" (1/1) ... [2018-06-22 17:24:11,185 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:24:11" (1/1) ... [2018-06-22 17:24:11,187 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 17:24:11,187 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 17:24:11,187 INFO ]: Initializing RCFGBuilder... [2018-06-22 17:24:11,188 INFO ]: RCFGBuilder initialized [2018-06-22 17:24:11,198 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:24:11" (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 17:24:11,208 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 17:24:11,208 INFO ]: Found specification of procedure False [2018-06-22 17:24:11,209 INFO ]: Found implementation of procedure False [2018-06-22 17:24:11,209 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 17:24:11,209 INFO ]: Found specification of procedure state [2018-06-22 17:24:11,209 INFO ]: Found implementation of procedure state [2018-06-22 17:24:11,209 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 17:24:11,209 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 17:24:11,209 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 17:24:11,545 INFO ]: Using library mode [2018-06-22 17:24:11,545 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:24:11 BoogieIcfgContainer [2018-06-22 17:24:11,545 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 17:24:11,554 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 17:24:11,554 INFO ]: Initializing TraceAbstraction... [2018-06-22 17:24:11,557 INFO ]: TraceAbstraction initialized [2018-06-22 17:24:11,557 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:24:11" (1/3) ... [2018-06-22 17:24:11,557 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b6c2f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:24:11, skipping insertion in model container [2018-06-22 17:24:11,558 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:24:11" (2/3) ... [2018-06-22 17:24:11,558 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b6c2f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:24:11, skipping insertion in model container [2018-06-22 17:24:11,558 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:24:11" (3/3) ... [2018-06-22 17:24:11,559 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 17:24:11,572 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 17:24:11,580 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 17:24:11,617 INFO ]: Using default assertion order modulation [2018-06-22 17:24:11,617 INFO ]: Interprodecural is true [2018-06-22 17:24:11,617 INFO ]: Hoare is false [2018-06-22 17:24:11,617 INFO ]: Compute interpolants for FPandBP [2018-06-22 17:24:11,617 INFO ]: Backedges is TWOTRACK [2018-06-22 17:24:11,618 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 17:24:11,618 INFO ]: Difference is false [2018-06-22 17:24:11,618 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 17:24:11,618 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 17:24:11,631 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 17:24:11,645 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 17:24:11,645 INFO ]: Found error trace [2018-06-22 17:24:11,646 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 17:24:11,646 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 17:24:11,651 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 17:24:11,652 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 17:24:11,653 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 17:24:11,685 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:24:11,685 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 17:24:11,685 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:24:11,736 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:24:11,861 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 17:24:11,863 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 17:24:11,863 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 17:24:11,864 INFO ]: Interpolant automaton has 4 states [2018-06-22 17:24:11,874 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 17:24:11,875 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 17:24:11,876 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 17:24:11,950 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 17:24:11,950 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 17:24:11,951 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 17:24:11,952 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 17:24:11,952 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 17:24:11,960 INFO ]: With dead ends: 13 [2018-06-22 17:24:11,960 INFO ]: Without dead ends: 13 [2018-06-22 17:24:11,962 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 17:24:11,976 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 17:24:11,995 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 17:24:11,996 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 17:24:11,997 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 17:24:11,998 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 17:24:11,998 INFO ]: Finished accepts. word is rejected. [2018-06-22 17:24:11,998 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 17:24:11,998 INFO ]: Interpolant automaton has 4 states. [2018-06-22 17:24:11,998 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 17:24:12,000 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 17:24:12,000 INFO ]: Found error trace [2018-06-22 17:24:12,000 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 17:24:12,000 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 17:24:12,000 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 17:24:12,000 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 17:24:12,000 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 17:24:12,001 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:24:12,001 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 17:24:12,001 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:24:12,046 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:24:12,334 WARN ]: Spent 117.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 11 [2018-06-22 17:24:12,407 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 17:24:12,407 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 17:24:12,407 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 17:24:12,421 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 17:24:12,503 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:24:12,512 INFO ]: Computing forward predicates... [2018-06-22 17:24:12,985 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 17:24:13,012 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 17:24:13,012 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-22 17:24:13,013 INFO ]: Interpolant automaton has 7 states [2018-06-22 17:24:13,013 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 17:24:13,013 INFO ]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-06-22 17:24:13,013 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2018-06-22 17:24:13,261 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 17:24:13,261 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 17:24:13,263 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 17:24:13,263 INFO ]: Start accepts. Automaton has 7 states. Word has length 13 [2018-06-22 17:24:13,263 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 17:24:13,264 INFO ]: With dead ends: 15 [2018-06-22 17:24:13,264 INFO ]: Without dead ends: 15 [2018-06-22 17:24:13,265 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-06-22 17:24:13,265 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 17:24:13,271 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 17:24:13,271 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 17:24:13,272 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 17:24:13,272 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 17:24:13,272 INFO ]: Finished accepts. word is rejected. [2018-06-22 17:24:13,272 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 17:24:13,272 INFO ]: Interpolant automaton has 7 states. [2018-06-22 17:24:13,272 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 17:24:13,273 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 17:24:13,273 INFO ]: Found error trace [2018-06-22 17:24:13,273 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 17:24:13,273 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 17:24:13,273 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 17:24:13,273 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 17:24:13,273 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 17:24:13,274 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:24:13,274 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 17:24:13,274 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:24:13,354 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:24:13,756 WARN ]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-06-22 17:24:13,904 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 17:24:13,904 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 17:24:13,904 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 17:24:13,912 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 17:24:13,982 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 17:24:13,982 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:24:13,986 INFO ]: Computing forward predicates... [2018-06-22 17:24:14,746 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 17:24:14,779 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 17:24:14,780 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-06-22 17:24:14,780 INFO ]: Interpolant automaton has 11 states [2018-06-22 17:24:14,780 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-22 17:24:14,780 INFO ]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2018-06-22 17:24:14,780 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-06-22 17:24:15,022 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 17:24:15,022 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 17:24:15,023 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 17:24:15,023 INFO ]: Start accepts. Automaton has 11 states. Word has length 17 [2018-06-22 17:24:15,023 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 17:24:15,024 INFO ]: With dead ends: 17 [2018-06-22 17:24:15,024 INFO ]: Without dead ends: 17 [2018-06-22 17:24:15,024 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2018-06-22 17:24:15,025 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 17:24:15,027 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 17:24:15,027 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 17:24:15,028 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 17:24:15,028 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 17:24:15,028 INFO ]: Finished accepts. word is rejected. [2018-06-22 17:24:15,028 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 17:24:15,028 INFO ]: Interpolant automaton has 11 states. [2018-06-22 17:24:15,028 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 17:24:15,029 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 17:24:15,029 INFO ]: Found error trace [2018-06-22 17:24:15,029 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 17:24:15,029 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 17:24:15,029 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 17:24:15,029 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 17:24:15,029 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 17:24:15,030 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:24:15,030 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 17:24:15,030 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:24:15,084 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:24:15,455 WARN ]: Spent 126.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2018-06-22 17:24:15,582 WARN ]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2018-06-22 17:24:15,712 WARN ]: Spent 114.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2018-06-22 17:24:15,862 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 17:24:15,862 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 17:24:15,862 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 17:24:15,878 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 17:24:15,949 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 17:24:15,949 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:24:15,954 INFO ]: Computing forward predicates... [2018-06-22 17:24:16,858 WARN ]: Spent 250.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2018-06-22 17:24:17,267 WARN ]: Spent 252.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2018-06-22 17:24:17,438 WARN ]: Spent 107.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2018-06-22 17:24:17,964 WARN ]: Spent 134.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 28 [2018-06-22 17:24:17,975 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 17:24:17,995 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 17:24:17,995 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2018-06-22 17:24:17,995 INFO ]: Interpolant automaton has 16 states [2018-06-22 17:24:17,995 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 17:24:17,996 INFO ]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2018-06-22 17:24:17,996 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 16 states. [2018-06-22 17:24:18,820 WARN ]: Spent 771.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 180 [2018-06-22 17:24:19,715 WARN ]: Spent 727.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 168 [2018-06-22 17:24:20,528 WARN ]: Spent 761.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 164 [2018-06-22 17:24:22,360 WARN ]: Spent 1.76 s on a formula simplification. DAG size of input: 158 DAG size of output: 143 [2018-06-22 17:24:22,450 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 17:24:22,450 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 17:24:22,451 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 17:24:22,451 INFO ]: Start accepts. Automaton has 16 states. Word has length 21 [2018-06-22 17:24:22,451 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 17:24:22,452 INFO ]: With dead ends: 19 [2018-06-22 17:24:22,452 INFO ]: Without dead ends: 19 [2018-06-22 17:24:22,452 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2018-06-22 17:24:22,452 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 17:24:22,455 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 17:24:22,455 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 17:24:22,456 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 17:24:22,456 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 17:24:22,456 INFO ]: Finished accepts. word is rejected. [2018-06-22 17:24:22,456 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 17:24:22,456 INFO ]: Interpolant automaton has 16 states. [2018-06-22 17:24:22,456 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 17:24:22,457 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 17:24:22,457 INFO ]: Found error trace [2018-06-22 17:24:22,457 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 17:24:22,457 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 17:24:22,457 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-22 17:24:22,457 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 17:24:22,457 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 17:24:22,458 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:24:22,458 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 17:24:22,458 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:24:22,531 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:24:23,322 WARN ]: Spent 478.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2018-06-22 17:24:23,546 WARN ]: Spent 133.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 85 [2018-06-22 17:24:23,703 WARN ]: Spent 140.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2018-06-22 17:24:24,038 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 17:24:24,038 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 17:24:24,038 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 17:24:24,044 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 17:24:24,099 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 17:24:24,099 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:24:24,104 INFO ]: Computing forward predicates... [2018-06-22 17:24:25,536 WARN ]: Spent 373.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 46 [2018-06-22 17:24:25,910 WARN ]: Spent 297.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 44 [2018-06-22 17:24:26,211 WARN ]: Spent 182.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2018-06-22 17:24:28,253 WARN ]: Spent 202.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 35 [2018-06-22 17:24:29,636 WARN ]: Spent 329.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 42 [2018-06-22 17:24:29,649 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 17:24:29,667 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 17:24:29,667 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2018-06-22 17:24:29,667 INFO ]: Interpolant automaton has 20 states [2018-06-22 17:24:29,667 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-22 17:24:29,668 INFO ]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2018-06-22 17:24:29,668 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 20 states. [2018-06-22 17:24:30,748 WARN ]: Spent 1000.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 194 [2018-06-22 17:24:30,880 WARN ]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 25 [2018-06-22 17:24:31,686 WARN ]: Spent 703.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 183 [2018-06-22 17:24:32,627 WARN ]: Spent 870.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 208 [2018-06-22 17:24:33,563 WARN ]: Spent 854.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 191 [2018-06-22 17:24:34,330 WARN ]: Spent 684.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 173 [2018-06-22 17:24:34,459 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 17:24:34,459 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 17:24:34,460 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 17:24:34,460 INFO ]: Start accepts. Automaton has 20 states. Word has length 25 [2018-06-22 17:24:34,460 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 17:24:34,460 INFO ]: With dead ends: 21 [2018-06-22 17:24:34,460 INFO ]: Without dead ends: 21 [2018-06-22 17:24:34,461 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2018-06-22 17:24:34,461 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 17:24:34,464 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 17:24:34,464 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 17:24:34,464 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 17:24:34,464 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 17:24:34,465 INFO ]: Finished accepts. word is rejected. [2018-06-22 17:24:34,465 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 17:24:34,465 INFO ]: Interpolant automaton has 20 states. [2018-06-22 17:24:34,465 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 17:24:34,465 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 17:24:34,466 INFO ]: Found error trace [2018-06-22 17:24:34,466 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 17:24:34,466 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 17:24:34,466 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 5 times [2018-06-22 17:24:34,466 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 17:24:34,466 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 17:24:34,466 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:24:34,466 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 17:24:34,466 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:24:34,551 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:24:35,047 WARN ]: Spent 215.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2018-06-22 17:24:35,287 WARN ]: Spent 152.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2018-06-22 17:24:36,077 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 17:24:36,077 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 17:24:36,078 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 17:24:36,087 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 17:24:36,168 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 17:24:36,168 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:24:36,176 INFO ]: Computing forward predicates... [2018-06-22 17:24:37,125 WARN ]: Spent 625.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 62 [2018-06-22 17:24:38,475 WARN ]: Spent 1.08 s on a formula simplification. DAG size of input: 129 DAG size of output: 71 [2018-06-22 17:24:39,100 WARN ]: Spent 440.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2018-06-22 17:24:40,509 WARN ]: Spent 644.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2018-06-22 17:24:41,132 WARN ]: Spent 243.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2018-06-22 17:24:43,358 WARN ]: Spent 1.06 s on a formula simplification. DAG size of input: 202 DAG size of output: 54 [2018-06-22 17:24:46,659 WARN ]: Spent 1.92 s on a formula simplification. DAG size of input: 320 DAG size of output: 44 [2018-06-22 17:24:46,677 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 17:24:46,698 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 17:24:46,698 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2018-06-22 17:24:46,698 INFO ]: Interpolant automaton has 24 states [2018-06-22 17:24:46,698 INFO ]: Constructing interpolant automaton starting with 24 interpolants. [2018-06-22 17:24:46,699 INFO ]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2018-06-22 17:24:46,699 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 24 states. [2018-06-22 17:24:48,702 WARN ]: Spent 1.88 s on a formula simplification. DAG size of input: 276 DAG size of output: 227 [2018-06-22 17:24:49,294 WARN ]: Spent 521.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 79 [2018-06-22 17:24:53,717 WARN ]: Spent 4.30 s on a formula simplification. DAG size of input: 403 DAG size of output: 258 [2018-06-22 17:24:56,901 WARN ]: Spent 3.08 s on a formula simplification. DAG size of input: 391 DAG size of output: 252 [2018-06-22 17:25:00,170 WARN ]: Spent 3.15 s on a formula simplification. DAG size of input: 371 DAG size of output: 247 [2018-06-22 17:25:02,646 WARN ]: Spent 2.22 s on a formula simplification. DAG size of input: 331 DAG size of output: 255 [2018-06-22 17:25:04,569 WARN ]: Spent 1.78 s on a formula simplification. DAG size of input: 281 DAG size of output: 213 [2018-06-22 17:25:06,586 WARN ]: Spent 1.84 s on a formula simplification. DAG size of input: 263 DAG size of output: 203 [2018-06-22 17:25:06,669 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 17:25:06,669 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 17:25:06,670 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 17:25:06,670 INFO ]: Start accepts. Automaton has 24 states. Word has length 29 [2018-06-22 17:25:06,670 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 17:25:06,671 INFO ]: With dead ends: 25 [2018-06-22 17:25:06,671 INFO ]: Without dead ends: 25 [2018-06-22 17:25:06,672 INFO ]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 28.2s TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2018-06-22 17:25:06,672 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 17:25:06,676 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 17:25:06,676 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 17:25:06,677 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 17:25:06,677 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 29 [2018-06-22 17:25:06,678 INFO ]: Finished accepts. word is rejected. [2018-06-22 17:25:06,678 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 17:25:06,678 INFO ]: Interpolant automaton has 24 states. [2018-06-22 17:25:06,678 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 17:25:06,679 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 17:25:06,679 INFO ]: Found error trace [2018-06-22 17:25:06,679 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 17:25:06,679 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 17:25:06,679 INFO ]: Analyzing trace with hash -411423458, now seen corresponding path program 6 times [2018-06-22 17:25:06,679 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 17:25:06,679 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 17:25:06,679 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:25:06,679 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 17:25:06,679 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:25:06,872 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:25:07,746 WARN ]: Spent 393.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 43 [2018-06-22 17:25:07,899 WARN ]: Spent 143.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 55 [2018-06-22 17:25:08,219 WARN ]: Spent 302.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 75 [2018-06-22 17:25:08,752 WARN ]: Spent 501.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 74 [2018-06-22 17:25:09,240 WARN ]: Spent 462.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 83 [2018-06-22 17:25:09,588 WARN ]: Spent 322.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 64 [2018-06-22 17:25:09,970 WARN ]: Spent 345.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 76 [2018-06-22 17:25:10,248 WARN ]: Spent 102.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 38 [2018-06-22 17:25:10,496 WARN ]: Spent 208.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 38 [2018-06-22 17:25:10,712 WARN ]: Spent 175.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 39 [2018-06-22 17:25:11,092 WARN ]: Spent 266.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 47 [2018-06-22 17:25:11,306 WARN ]: Spent 172.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 45 [2018-06-22 17:25:11,345 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 17:25:11,345 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 17:25:11,346 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 17:25:11,361 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 17:25:11,461 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-06-22 17:25:11,461 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:25:11,470 INFO ]: Computing forward predicates... [2018-06-22 17:25:11,825 WARN ]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 34 [2018-06-22 17:25:12,534 WARN ]: Spent 626.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2018-06-22 17:25:12,920 WARN ]: Spent 314.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 Received shutdown request... [2018-06-22 17:25:13,976 WARN ]: Removed 22 from assertion stack [2018-06-22 17:25:13,976 INFO ]: Timeout while computing interpolants [2018-06-22 17:25:14,176 WARN ]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 17:25:14,177 WARN ]: Verification canceled [2018-06-22 17:25:14,180 WARN ]: Timeout [2018-06-22 17:25:14,180 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 05:25:14 BoogieIcfgContainer [2018-06-22 17:25:14,180 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 17:25:14,181 INFO ]: Toolchain (without parser) took 63093.90 ms. Allocated memory was 308.3 MB in the beginning and 859.3 MB in the end (delta: 551.0 MB). Free memory was 260.7 MB in the beginning and 544.4 MB in the end (delta: -283.7 MB). Peak memory consumption was 638.0 MB. Max. memory is 3.6 GB. [2018-06-22 17:25:14,181 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 308.3 MB. Free memory is still 272.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 17:25:14,182 INFO ]: ChcToBoogie took 57.77 ms. Allocated memory is still 308.3 MB. Free memory was 260.7 MB in the beginning and 258.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 17:25:14,182 INFO ]: Boogie Preprocessor took 36.29 ms. Allocated memory is still 308.3 MB. Free memory was 258.7 MB in the beginning and 256.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 17:25:14,183 INFO ]: RCFGBuilder took 357.89 ms. Allocated memory is still 308.3 MB. Free memory was 256.7 MB in the beginning and 246.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. [2018-06-22 17:25:14,183 INFO ]: TraceAbstraction took 62625.93 ms. Allocated memory was 308.3 MB in the beginning and 859.3 MB in the end (delta: 551.0 MB). Free memory was 246.7 MB in the beginning and 544.4 MB in the end (delta: -297.7 MB). Peak memory consumption was 624.0 MB. Max. memory is 3.6 GB. [2018-06-22 17:25:14,186 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 308.3 MB. Free memory is still 272.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 57.77 ms. Allocated memory is still 308.3 MB. Free memory was 260.7 MB in the beginning and 258.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 36.29 ms. Allocated memory is still 308.3 MB. Free memory was 258.7 MB in the beginning and 256.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 357.89 ms. Allocated memory is still 308.3 MB. Free memory was 256.7 MB in the beginning and 246.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 62625.93 ms. Allocated memory was 308.3 MB in the beginning and 859.3 MB in the end (delta: 551.0 MB). Free memory was 246.7 MB in the beginning and 544.4 MB in the end (delta: -297.7 MB). Peak memory consumption was 624.0 MB. 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 PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 130. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 62.5s OverallTime, 7 OverallIterations, 8 TraceHistogramMax, 29.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 66 SDtfs, 162 SDslu, 388 SDs, 0 SdLazy, 302 SolverSat, 203 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 178 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 43.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=6, 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, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 24.1s InterpolantComputationTime, 219 NumberOfCodeBlocks, 219 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 208 ConstructedInterpolants, 0 QuantifiedInterpolants, 233544 SizeOfPredicates, 263 NumberOfNonLiveVariables, 1610 ConjunctsInSsa, 341 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 70/250 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/durationThm_3_e3_442_e6_113.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_17-25-14-196.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/durationThm_3_e3_442_e6_113.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_17-25-14-196.csv Completed graceful shutdown