java -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/chccomp2018/chcToBoogie_automizer.epf -i /storage/chc-comp/vmt-chc-benchmarks/cav12/s3_srvr_7.cil.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 12:57:07,750 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 12:57:07,752 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 12:57:07,764 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 12:57:07,764 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 12:57:07,765 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 12:57:07,767 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 12:57:07,768 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 12:57:07,770 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 12:57:07,771 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 12:57:07,772 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 12:57:07,772 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 12:57:07,773 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 12:57:07,774 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 12:57:07,774 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 12:57:07,775 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 12:57:07,777 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 12:57:07,781 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 12:57:07,783 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 12:57:07,787 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 12:57:07,788 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 12:57:07,790 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 12:57:07,791 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 12:57:07,791 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 12:57:07,792 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 12:57:07,793 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 12:57:07,797 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 12:57:07,798 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 12:57:07,799 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 12:57:07,799 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 12:57:07,800 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 12:57:07,800 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 12:57:07,801 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 12:57:07,801 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 12:57:07,802 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 12:57:07,802 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 12:57:07,828 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 12:57:07,829 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 12:57:07,829 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 12:57:07,829 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 12:57:07,831 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 12:57:07,831 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 12:57:07,831 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 12:57:07,831 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 12:57:07,831 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 12:57:07,832 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 12:57:07,832 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 12:57:07,832 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 12:57:07,832 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 12:57:07,832 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 12:57:07,833 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 12:57:07,836 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 12:57:07,836 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 12:57:07,838 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 12:57:07,838 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 12:57:07,887 INFO ]: Repository-Root is: /tmp [2018-06-18 12:57:07,905 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 12:57:07,909 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 12:57:07,910 INFO ]: Initializing SmtParser... [2018-06-18 12:57:07,910 INFO ]: SmtParser initialized [2018-06-18 12:57:07,911 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/s3_srvr_7.cil.smt2 [2018-06-18 12:57:07,912 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 [2018-06-18 12:57:08,012 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/s3_srvr_7.cil.smt2 unknown [2018-06-18 12:57:08,729 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/s3_srvr_7.cil.smt2 [2018-06-18 12:57:08,734 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 12:57:08,739 INFO ]: Walking toolchain with 4 elements. [2018-06-18 12:57:08,739 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 12:57:08,739 INFO ]: Initializing ChcToBoogie... [2018-06-18 12:57:08,739 INFO ]: ChcToBoogie initialized [2018-06-18 12:57:08,746 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 12:57:08" (1/1) ... [2018-06-18 12:57:09,386 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:57:09 Unit [2018-06-18 12:57:09,386 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 12:57:09,387 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 12:57:09,387 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 12:57:09,387 INFO ]: Boogie Preprocessor initialized [2018-06-18 12:57:09,410 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:57:09" (1/1) ... [2018-06-18 12:57:09,410 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:57:09" (1/1) ... [2018-06-18 12:57:09,469 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:57:09" (1/1) ... [2018-06-18 12:57:09,470 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:57:09" (1/1) ... [2018-06-18 12:57:09,533 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:57:09" (1/1) ... [2018-06-18 12:57:09,535 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:57:09" (1/1) ... [2018-06-18 12:57:09,552 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:57:09" (1/1) ... [2018-06-18 12:57:09,570 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 12:57:09,570 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 12:57:09,570 INFO ]: Initializing RCFGBuilder... [2018-06-18 12:57:09,570 INFO ]: RCFGBuilder initialized [2018-06-18 12:57:09,573 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:57:09" (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) [2018-06-18 12:57:09,587 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 12:57:09,587 INFO ]: Found specification of procedure False [2018-06-18 12:57:09,588 INFO ]: Found implementation of procedure False [2018-06-18 12:57:09,588 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-18 12:57:09,588 INFO ]: Found specification of procedure state [2018-06-18 12:57:09,588 INFO ]: Found implementation of procedure state [2018-06-18 12:57:09,588 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 12:57:09,588 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 12:57:09,588 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 [2018-06-18 12:57:10,582 INFO ]: Using library mode [2018-06-18 12:57:10,583 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 12:57:10 BoogieIcfgContainer [2018-06-18 12:57:10,583 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 12:57:10,585 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 12:57:10,585 INFO ]: Initializing TraceAbstraction... [2018-06-18 12:57:10,590 INFO ]: TraceAbstraction initialized [2018-06-18 12:57:10,590 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 12:57:08" (1/3) ... [2018-06-18 12:57:10,591 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71f023a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 12:57:10, skipping insertion in model container [2018-06-18 12:57:10,591 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:57:09" (2/3) ... [2018-06-18 12:57:10,591 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71f023a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 12:57:10, skipping insertion in model container [2018-06-18 12:57:10,591 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 12:57:10" (3/3) ... [2018-06-18 12:57:10,593 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 12:57:10,603 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 12:57:10,614 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 12:57:10,664 INFO ]: Using default assertion order modulation [2018-06-18 12:57:10,664 INFO ]: Interprodecural is true [2018-06-18 12:57:10,664 INFO ]: Hoare is false [2018-06-18 12:57:10,664 INFO ]: Compute interpolants for FPandBP [2018-06-18 12:57:10,664 INFO ]: Backedges is TWOTRACK [2018-06-18 12:57:10,664 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 12:57:10,664 INFO ]: Difference is false [2018-06-18 12:57:10,664 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 12:57:10,665 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 12:57:10,683 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 12:57:10,702 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 12:57:10,702 INFO ]: Found error trace [2018-06-18 12:57:10,703 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:57:10,703 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:57:10,711 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-18 12:57:10,713 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:57:10,713 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:57:10,771 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:57:10,771 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 12:57:10,771 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:57:10,816 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:57:10,827 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:57:11,033 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 12:57:11,036 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 12:57:11,036 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 12:57:11,043 INFO ]: Interpolant automaton has 4 states [2018-06-18 12:57:11,069 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 12:57:11,070 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 12:57:11,072 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 12:57:11,229 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 12:57:11,229 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 12:57:11,230 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 12:57:11,231 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 12:57:11,231 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 12:57:11,243 INFO ]: With dead ends: 13 [2018-06-18 12:57:11,243 INFO ]: Without dead ends: 13 [2018-06-18 12:57:11,245 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 12:57:11,264 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 12:57:11,298 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 12:57:11,299 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 12:57:11,300 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 12:57:11,303 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 12:57:11,303 INFO ]: Finished accepts. word is rejected. [2018-06-18 12:57:11,303 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 12:57:11,304 INFO ]: Interpolant automaton has 4 states. [2018-06-18 12:57:11,304 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 12:57:11,305 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 12:57:11,305 INFO ]: Found error trace [2018-06-18 12:57:11,305 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:57:11,305 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:57:11,305 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-18 12:57:11,305 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:57:11,306 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:57:11,307 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:57:11,307 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 12:57:11,307 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:57:11,470 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:57:11,471 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:57:11,920 WARN ]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-18 12:57:12,100 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 12:57:12,100 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 12:57:12,100 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 [2018-06-18 12:57:12,111 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 12:57:12,208 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:57:12,222 INFO ]: Computing forward predicates... [2018-06-18 12:57:13,419 WARN ]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-18 12:57:14,081 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 12:57:14,121 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 12:57:14,121 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-18 12:57:14,122 INFO ]: Interpolant automaton has 10 states [2018-06-18 12:57:14,122 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-18 12:57:14,122 INFO ]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-06-18 12:57:14,122 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 10 states. [2018-06-18 12:57:14,565 WARN ]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-06-18 12:57:14,887 WARN ]: Spent 176.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 8 [2018-06-18 12:57:14,955 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 12:57:14,955 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 12:57:14,956 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 12:57:14,956 INFO ]: Start accepts. Automaton has 10 states. Word has length 13 [2018-06-18 12:57:14,956 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 12:57:14,957 INFO ]: With dead ends: 15 [2018-06-18 12:57:14,957 INFO ]: Without dead ends: 15 [2018-06-18 12:57:14,958 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-06-18 12:57:14,958 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 12:57:14,960 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 12:57:14,960 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 12:57:14,962 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 12:57:14,962 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 12:57:14,962 INFO ]: Finished accepts. word is rejected. [2018-06-18 12:57:14,962 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 12:57:14,962 INFO ]: Interpolant automaton has 10 states. [2018-06-18 12:57:14,962 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 12:57:14,963 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 12:57:14,963 INFO ]: Found error trace [2018-06-18 12:57:14,963 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:57:14,963 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:57:14,963 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-18 12:57:14,963 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:57:14,963 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:57:14,964 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:57:14,964 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 12:57:14,964 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:57:15,085 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:57:15,086 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:57:15,527 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 12:57:15,528 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 12:57:15,528 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 [2018-06-18 12:57:15,546 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 12:57:15,668 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 12:57:15,668 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:57:15,679 INFO ]: Computing forward predicates... [2018-06-18 12:57:16,665 WARN ]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-18 12:57:17,698 WARN ]: Spent 637.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2018-06-18 12:57:17,760 INFO ]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 12:57:17,781 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 12:57:17,781 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-06-18 12:57:17,781 INFO ]: Interpolant automaton has 14 states [2018-06-18 12:57:17,781 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-18 12:57:17,783 INFO ]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2018-06-18 12:57:17,783 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 14 states. [2018-06-18 12:57:17,999 WARN ]: Spent 183.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2018-06-18 12:57:18,180 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 12:57:18,180 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-18 12:57:18,181 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-18 12:57:18,181 INFO ]: Start accepts. Automaton has 14 states. Word has length 17 [2018-06-18 12:57:18,181 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 12:57:18,182 INFO ]: With dead ends: 17 [2018-06-18 12:57:18,182 INFO ]: Without dead ends: 17 [2018-06-18 12:57:18,182 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2018-06-18 12:57:18,182 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-18 12:57:18,184 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-18 12:57:18,184 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-18 12:57:18,185 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-18 12:57:18,185 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-18 12:57:18,185 INFO ]: Finished accepts. word is rejected. [2018-06-18 12:57:18,185 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-18 12:57:18,185 INFO ]: Interpolant automaton has 14 states. [2018-06-18 12:57:18,185 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-18 12:57:18,186 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-18 12:57:18,186 INFO ]: Found error trace [2018-06-18 12:57:18,186 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:57:18,186 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:57:18,186 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-18 12:57:18,186 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:57:18,186 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:57:18,187 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:57:18,187 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 12:57:18,187 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:57:18,326 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:57:18,327 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:57:18,743 WARN ]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-18 12:57:18,959 WARN ]: Spent 138.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 15 [2018-06-18 12:57:19,150 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 12:57:19,150 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 12:57:19,150 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 [2018-06-18 12:57:19,160 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-18 12:57:19,294 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-18 12:57:19,294 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:57:19,306 INFO ]: Computing forward predicates... [2018-06-18 12:57:23,028 WARN ]: Spent 2.88 s on a formula simplification. DAG size of input: 229 DAG size of output: 123 [2018-06-18 12:57:25,549 WARN ]: Spent 1.76 s on a formula simplification. DAG size of input: 113 DAG size of output: 30 [2018-06-18 12:57:25,651 INFO ]: Checked inductivity of 21 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 12:57:25,676 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 12:57:25,676 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2018-06-18 12:57:25,676 INFO ]: Interpolant automaton has 18 states [2018-06-18 12:57:25,676 INFO ]: Constructing interpolant automaton starting with 18 interpolants. [2018-06-18 12:57:25,677 INFO ]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-06-18 12:57:25,677 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 18 states. [2018-06-18 12:57:27,203 WARN ]: Spent 1.47 s on a formula simplification. DAG size of input: 135 DAG size of output: 135 [2018-06-18 12:57:27,770 WARN ]: Spent 526.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 119 [2018-06-18 12:57:28,678 WARN ]: Spent 878.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 120 [2018-06-18 12:57:29,534 WARN ]: Spent 778.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 133 [2018-06-18 12:57:29,571 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 12:57:29,571 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-18 12:57:29,571 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-18 12:57:29,571 INFO ]: Start accepts. Automaton has 18 states. Word has length 21 [2018-06-18 12:57:29,571 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 12:57:29,572 INFO ]: With dead ends: 19 [2018-06-18 12:57:29,572 INFO ]: Without dead ends: 19 [2018-06-18 12:57:29,572 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2018-06-18 12:57:29,572 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-18 12:57:29,574 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-18 12:57:29,574 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-18 12:57:29,575 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-18 12:57:29,575 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-18 12:57:29,575 INFO ]: Finished accepts. word is rejected. [2018-06-18 12:57:29,575 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-18 12:57:29,575 INFO ]: Interpolant automaton has 18 states. [2018-06-18 12:57:29,575 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-18 12:57:29,576 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-18 12:57:29,576 INFO ]: Found error trace [2018-06-18 12:57:29,576 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:57:29,576 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:57:29,576 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-18 12:57:29,576 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:57:29,576 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:57:29,577 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:57:29,577 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 12:57:29,577 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:57:29,788 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:57:29,789 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:57:30,316 WARN ]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-18 12:57:30,825 WARN ]: Spent 429.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2018-06-18 12:57:31,050 WARN ]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 16 [2018-06-18 12:57:31,105 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-18 12:57:31,105 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 12:57:31,105 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 [2018-06-18 12:57:31,111 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-18 12:57:31,222 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-18 12:57:31,222 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:57:31,237 INFO ]: Computing forward predicates... [2018-06-18 12:57:32,118 WARN ]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-18 12:57:32,836 WARN ]: Spent 211.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2018-06-18 12:57:33,630 WARN ]: Spent 291.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2018-06-18 12:57:34,037 WARN ]: Spent 177.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2018-06-18 12:57:34,349 INFO ]: Checked inductivity of 36 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-18 12:57:34,370 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 12:57:34,370 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2018-06-18 12:57:34,371 INFO ]: Interpolant automaton has 22 states [2018-06-18 12:57:34,371 INFO ]: Constructing interpolant automaton starting with 22 interpolants. [2018-06-18 12:57:34,371 INFO ]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2018-06-18 12:57:34,371 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 22 states. [2018-06-18 12:57:34,675 WARN ]: Spent 263.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2018-06-18 12:57:34,837 WARN ]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 24 [2018-06-18 12:57:35,163 WARN ]: Spent 182.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2018-06-18 12:57:35,400 WARN ]: Spent 210.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2018-06-18 12:57:35,426 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 12:57:35,426 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-18 12:57:35,426 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-18 12:57:35,426 INFO ]: Start accepts. Automaton has 22 states. Word has length 25 [2018-06-18 12:57:35,427 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 12:57:35,427 INFO ]: With dead ends: 21 [2018-06-18 12:57:35,427 INFO ]: Without dead ends: 21 [2018-06-18 12:57:35,428 INFO ]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2018-06-18 12:57:35,428 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-18 12:57:35,430 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-18 12:57:35,430 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-18 12:57:35,430 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-18 12:57:35,430 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-18 12:57:35,431 INFO ]: Finished accepts. word is rejected. [2018-06-18 12:57:35,431 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-18 12:57:35,431 INFO ]: Interpolant automaton has 22 states. [2018-06-18 12:57:35,432 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-18 12:57:35,433 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-18 12:57:35,433 INFO ]: Found error trace [2018-06-18 12:57:35,433 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:57:35,433 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:57:35,433 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 5 times [2018-06-18 12:57:35,433 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:57:35,433 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:57:35,434 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:57:35,434 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 12:57:35,434 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:57:35,700 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:57:35,701 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:57:36,371 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-18 12:57:36,371 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 12:57:36,371 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 [2018-06-18 12:57:36,381 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-18 12:57:36,588 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-18 12:57:36,588 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:57:36,606 INFO ]: Computing forward predicates... [2018-06-18 12:57:38,523 WARN ]: Spent 1.16 s on a formula simplification. DAG size of input: 307 DAG size of output: 10 [2018-06-18 12:57:45,430 WARN ]: Spent 6.12 s on a formula simplification. DAG size of input: 360 DAG size of output: 203 [2018-06-18 12:57:57,850 WARN ]: Spent 10.85 s on a formula simplification. DAG size of input: 503 DAG size of output: 205 [2018-06-18 12:58:06,308 WARN ]: Spent 7.45 s on a formula simplification. DAG size of input: 431 DAG size of output: 210 [2018-06-18 12:58:07,027 WARN ]: Spent 248.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 42 [2018-06-18 12:58:07,390 WARN ]: Spent 135.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 20 [2018-06-18 12:58:07,426 INFO ]: Checked inductivity of 55 backedges. 7 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-18 12:58:07,447 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 12:58:07,447 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2018-06-18 12:58:07,448 INFO ]: Interpolant automaton has 26 states [2018-06-18 12:58:07,448 INFO ]: Constructing interpolant automaton starting with 26 interpolants. [2018-06-18 12:58:07,448 INFO ]: CoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2018-06-18 12:58:07,448 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 26 states. [2018-06-18 12:58:07,991 WARN ]: Spent 418.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 43 Received shutdown request... [2018-06-18 12:58:08,361 WARN ]: Removed 29 from assertion stack [2018-06-18 12:58:08,362 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 12:58:08,362 WARN ]: Verification canceled [2018-06-18 12:58:08,366 WARN ]: Timeout [2018-06-18 12:58:08,366 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.06 12:58:08 BoogieIcfgContainer [2018-06-18 12:58:08,366 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-18 12:58:08,367 INFO ]: Toolchain (without parser) took 59633.10 ms. Allocated memory was 303.0 MB in the beginning and 1.3 GB in the end (delta: 958.4 MB). Free memory was 235.7 MB in the beginning and 320.6 MB in the end (delta: -84.9 MB). Peak memory consumption was 873.5 MB. Max. memory is 3.6 GB. [2018-06-18 12:58:08,368 INFO ]: SmtParser took 0.05 ms. Allocated memory is still 303.0 MB. Free memory is still 267.7 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 12:58:08,368 INFO ]: ChcToBoogie took 647.00 ms. Allocated memory was 303.0 MB in the beginning and 332.4 MB in the end (delta: 29.4 MB). Free memory was 235.7 MB in the beginning and 191.3 MB in the end (delta: 44.3 MB). Peak memory consumption was 73.7 MB. Max. memory is 3.6 GB. [2018-06-18 12:58:08,369 INFO ]: Boogie Preprocessor took 183.11 ms. Allocated memory is still 332.4 MB. Free memory was 191.3 MB in the beginning and 180.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 3.6 GB. [2018-06-18 12:58:08,369 INFO ]: RCFGBuilder took 1012.63 ms. Allocated memory was 332.4 MB in the beginning and 393.7 MB in the end (delta: 61.3 MB). Free memory was 180.8 MB in the beginning and 259.4 MB in the end (delta: -78.6 MB). Peak memory consumption was 17.2 MB. Max. memory is 3.6 GB. [2018-06-18 12:58:08,369 INFO ]: TraceAbstraction took 57781.33 ms. Allocated memory was 393.7 MB in the beginning and 1.3 GB in the end (delta: 867.7 MB). Free memory was 259.4 MB in the beginning and 320.6 MB in the end (delta: -61.2 MB). Peak memory consumption was 806.5 MB. Max. memory is 3.6 GB. [2018-06-18 12:58:08,371 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.05 ms. Allocated memory is still 303.0 MB. Free memory is still 267.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 647.00 ms. Allocated memory was 303.0 MB in the beginning and 332.4 MB in the end (delta: 29.4 MB). Free memory was 235.7 MB in the beginning and 191.3 MB in the end (delta: 44.3 MB). Peak memory consumption was 73.7 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 183.11 ms. Allocated memory is still 332.4 MB. Free memory was 191.3 MB in the beginning and 180.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 3.6 GB. * RCFGBuilder took 1012.63 ms. Allocated memory was 332.4 MB in the beginning and 393.7 MB in the end (delta: 61.3 MB). Free memory was 180.8 MB in the beginning and 259.4 MB in the end (delta: -78.6 MB). Peak memory consumption was 17.2 MB. Max. memory is 3.6 GB. * TraceAbstraction took 57781.33 ms. Allocated memory was 393.7 MB in the beginning and 1.3 GB in the end (delta: 867.7 MB). Free memory was 259.4 MB in the beginning and 320.6 MB in the end (delta: -61.2 MB). Peak memory consumption was 806.5 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 constructing difference of abstraction (21states) and interpolant automaton (currently 6 states, 26 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 211. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 57.7s OverallTime, 6 OverallIterations, 6 TraceHistogramMax, 7.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 63 SDtfs, 65 SDslu, 247 SDs, 0 SdLazy, 203 SolverSat, 86 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 171 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 48.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=5, 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, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 48.3s InterpolantComputationTime, 219 NumberOfCodeBlocks, 219 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 208 ConstructedInterpolants, 0 QuantifiedInterpolants, 177984 SizeOfPredicates, 2086 NumberOfNonLiveVariables, 1945 ConjunctsInSsa, 110 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 84/250 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/s3_srvr_7.cil.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-18_12-58-08-381.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/s3_srvr_7.cil.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-18_12-58-08-381.csv Completed graceful shutdown