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/metros_4_e2_968_e4_801.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 19:22:13,030 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 19:22:13,033 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 19:22:13,046 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 19:22:13,046 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 19:22:13,047 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 19:22:13,048 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 19:22:13,052 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 19:22:13,054 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 19:22:13,054 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 19:22:13,056 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 19:22:13,057 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 19:22:13,057 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 19:22:13,058 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 19:22:13,059 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 19:22:13,062 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 19:22:13,064 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 19:22:13,066 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 19:22:13,078 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 19:22:13,079 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 19:22:13,080 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 19:22:13,082 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 19:22:13,082 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 19:22:13,082 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 19:22:13,083 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 19:22:13,084 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 19:22:13,084 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 19:22:13,085 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 19:22:13,091 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 19:22:13,091 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 19:22:13,092 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 19:22:13,093 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 19:22:13,093 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 19:22:13,093 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 19:22:13,094 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 19:22:13,094 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 19:22:13,114 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 19:22:13,114 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 19:22:13,115 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 19:22:13,115 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 19:22:13,116 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 19:22:13,116 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 19:22:13,116 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 19:22:13,116 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 19:22:13,116 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 19:22:13,117 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 19:22:13,117 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 19:22:13,117 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 19:22:13,117 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 19:22:13,117 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 19:22:13,117 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 19:22:13,120 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 19:22:13,120 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 19:22:13,120 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 19:22:13,121 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 19:22:13,123 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 19:22:13,123 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 19:22:13,173 INFO ]: Repository-Root is: /tmp [2018-06-22 19:22:13,188 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 19:22:13,192 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 19:22:13,193 INFO ]: Initializing SmtParser... [2018-06-22 19:22:13,194 INFO ]: SmtParser initialized [2018-06-22 19:22:13,194 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_4_e2_968_e4_801.smt2 [2018-06-22 19:22:13,195 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 19:22:13,288 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_4_e2_968_e4_801.smt2 unknown [2018-06-22 19:22:13,751 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_4_e2_968_e4_801.smt2 [2018-06-22 19:22:13,760 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 19:22:13,775 INFO ]: Walking toolchain with 4 elements. [2018-06-22 19:22:13,775 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 19:22:13,775 INFO ]: Initializing ChcToBoogie... [2018-06-22 19:22:13,776 INFO ]: ChcToBoogie initialized [2018-06-22 19:22:13,779 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:22:13" (1/1) ... [2018-06-22 19:22:13,853 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:22:13 Unit [2018-06-22 19:22:13,853 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 19:22:13,853 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 19:22:13,853 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 19:22:13,853 INFO ]: Boogie Preprocessor initialized [2018-06-22 19:22:13,887 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:22:13" (1/1) ... [2018-06-22 19:22:13,887 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:22:13" (1/1) ... [2018-06-22 19:22:13,909 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:22:13" (1/1) ... [2018-06-22 19:22:13,909 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:22:13" (1/1) ... [2018-06-22 19:22:13,914 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:22:13" (1/1) ... [2018-06-22 19:22:13,924 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:22:13" (1/1) ... [2018-06-22 19:22:13,926 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:22:13" (1/1) ... [2018-06-22 19:22:13,935 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 19:22:13,936 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 19:22:13,936 INFO ]: Initializing RCFGBuilder... [2018-06-22 19:22:13,936 INFO ]: RCFGBuilder initialized [2018-06-22 19:22:13,936 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:22:13" (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) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 19:22:13,945 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 19:22:13,945 INFO ]: Found specification of procedure False [2018-06-22 19:22:13,946 INFO ]: Found implementation of procedure False [2018-06-22 19:22:13,946 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 19:22:13,946 INFO ]: Found specification of procedure state [2018-06-22 19:22:13,946 INFO ]: Found implementation of procedure state [2018-06-22 19:22:13,946 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 19:22:13,946 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 19:22:13,946 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 19:22:14,260 INFO ]: Using library mode [2018-06-22 19:22:14,261 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:22:14 BoogieIcfgContainer [2018-06-22 19:22:14,261 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 19:22:14,262 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 19:22:14,262 INFO ]: Initializing TraceAbstraction... [2018-06-22 19:22:14,267 INFO ]: TraceAbstraction initialized [2018-06-22 19:22:14,267 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:22:13" (1/3) ... [2018-06-22 19:22:14,268 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7909b629 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 07:22:14, skipping insertion in model container [2018-06-22 19:22:14,268 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:22:13" (2/3) ... [2018-06-22 19:22:14,268 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7909b629 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 07:22:14, skipping insertion in model container [2018-06-22 19:22:14,268 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:22:14" (3/3) ... [2018-06-22 19:22:14,270 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 19:22:14,280 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 19:22:14,290 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 19:22:14,335 INFO ]: Using default assertion order modulation [2018-06-22 19:22:14,336 INFO ]: Interprodecural is true [2018-06-22 19:22:14,336 INFO ]: Hoare is false [2018-06-22 19:22:14,336 INFO ]: Compute interpolants for FPandBP [2018-06-22 19:22:14,336 INFO ]: Backedges is TWOTRACK [2018-06-22 19:22:14,336 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 19:22:14,336 INFO ]: Difference is false [2018-06-22 19:22:14,336 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 19:22:14,336 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 19:22:14,349 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 19:22:14,363 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 19:22:14,363 INFO ]: Found error trace [2018-06-22 19:22:14,364 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:22:14,364 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:22:14,370 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 19:22:14,372 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:22:14,373 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:22:14,411 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:22:14,411 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:22:14,411 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:22:14,522 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:22:14,719 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 19:22:14,721 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 19:22:14,722 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 19:22:14,724 INFO ]: Interpolant automaton has 4 states [2018-06-22 19:22:14,739 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 19:22:14,740 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 19:22:14,742 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 19:22:14,880 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:22:14,880 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 19:22:14,881 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 19:22:14,882 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 19:22:14,882 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:22:14,894 INFO ]: With dead ends: 13 [2018-06-22 19:22:14,894 INFO ]: Without dead ends: 13 [2018-06-22 19:22:14,896 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 19:22:14,914 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 19:22:14,947 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 19:22:14,948 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 19:22:14,949 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 19:22:14,950 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 19:22:14,950 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:22:14,950 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 19:22:14,950 INFO ]: Interpolant automaton has 4 states. [2018-06-22 19:22:14,951 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 19:22:14,952 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 19:22:14,952 INFO ]: Found error trace [2018-06-22 19:22:14,952 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:22:14,952 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:22:14,952 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 19:22:14,952 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:22:14,952 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:22:14,953 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:22:14,953 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:22:14,953 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:22:15,044 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:22:15,677 WARN ]: Spent 405.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2018-06-22 19:22:15,738 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:22:15,738 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:22:15,738 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 19:22:15,745 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:22:15,873 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:22:15,884 INFO ]: Computing forward predicates... [2018-06-22 19:22:16,136 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:22:16,171 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:22:16,171 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 19:22:16,172 INFO ]: Interpolant automaton has 9 states [2018-06-22 19:22:16,172 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 19:22:16,172 INFO ]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-06-22 19:22:16,172 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 19:22:16,325 WARN ]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 19:22:16,808 WARN ]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2018-06-22 19:22:16,973 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:22:16,973 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 19:22:16,976 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 19:22:16,976 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 19:22:16,976 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:22:16,976 INFO ]: With dead ends: 15 [2018-06-22 19:22:16,976 INFO ]: Without dead ends: 15 [2018-06-22 19:22:16,977 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-06-22 19:22:16,978 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 19:22:16,980 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 19:22:16,980 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 19:22:16,980 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 19:22:16,980 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 19:22:16,981 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:22:16,981 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 19:22:16,981 INFO ]: Interpolant automaton has 9 states. [2018-06-22 19:22:16,981 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 19:22:16,981 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 19:22:16,981 INFO ]: Found error trace [2018-06-22 19:22:16,981 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:22:16,981 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:22:16,982 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 19:22:16,982 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:22:16,982 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:22:16,982 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:22:16,982 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:22:16,982 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:22:17,116 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:22:17,474 WARN ]: Spent 112.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2018-06-22 19:22:17,612 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:22:17,612 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:22:17,612 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 19:22:17,628 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 19:22:17,746 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 19:22:17,746 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:22:17,751 INFO ]: Computing forward predicates... [2018-06-22 19:22:18,051 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:22:18,071 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:22:18,071 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 19:22:18,071 INFO ]: Interpolant automaton has 13 states [2018-06-22 19:22:18,071 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 19:22:18,071 INFO ]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-06-22 19:22:18,072 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 19:22:18,243 WARN ]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2018-06-22 19:22:18,431 WARN ]: Spent 149.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2018-06-22 19:22:18,563 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:22:18,564 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 19:22:18,564 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 19:22:18,564 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 19:22:18,564 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:22:18,565 INFO ]: With dead ends: 17 [2018-06-22 19:22:18,565 INFO ]: Without dead ends: 17 [2018-06-22 19:22:18,565 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2018-06-22 19:22:18,565 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 19:22:18,568 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 19:22:18,568 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 19:22:18,569 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 19:22:18,569 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 19:22:18,569 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:22:18,569 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 19:22:18,569 INFO ]: Interpolant automaton has 13 states. [2018-06-22 19:22:18,569 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 19:22:18,570 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 19:22:18,570 INFO ]: Found error trace [2018-06-22 19:22:18,570 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:22:18,570 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:22:18,570 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 19:22:18,570 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:22:18,570 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:22:18,571 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:22:18,571 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:22:18,571 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:22:18,673 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:22:19,147 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:22:19,148 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:22:19,148 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 19:22:19,165 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 19:22:19,314 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 19:22:19,314 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:22:19,322 INFO ]: Computing forward predicates... [2018-06-22 19:22:20,030 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:22:20,062 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:22:20,062 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-22 19:22:20,063 INFO ]: Interpolant automaton has 17 states [2018-06-22 19:22:20,063 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 19:22:20,063 INFO ]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2018-06-22 19:22:20,063 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-22 19:22:20,487 WARN ]: Spent 137.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2018-06-22 19:22:20,699 WARN ]: Spent 172.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2018-06-22 19:22:20,869 WARN ]: Spent 140.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2018-06-22 19:22:20,976 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:22:20,976 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 19:22:20,978 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 19:22:20,978 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-22 19:22:20,978 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:22:20,978 INFO ]: With dead ends: 19 [2018-06-22 19:22:20,978 INFO ]: Without dead ends: 19 [2018-06-22 19:22:20,979 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2018-06-22 19:22:20,979 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 19:22:20,984 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 19:22:20,984 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 19:22:20,985 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 19:22:20,985 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 19:22:20,985 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:22:20,985 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 19:22:20,985 INFO ]: Interpolant automaton has 17 states. [2018-06-22 19:22:20,985 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 19:22:20,986 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 19:22:20,986 INFO ]: Found error trace [2018-06-22 19:22:20,986 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:22:20,986 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:22:20,986 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-22 19:22:20,986 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:22:20,986 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:22:20,987 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:22:20,987 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:22:20,987 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:22:21,174 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:22:21,676 WARN ]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-06-22 19:22:22,281 WARN ]: Spent 534.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 21 [2018-06-22 19:22:22,474 WARN ]: Spent 151.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 29 [2018-06-22 19:22:22,896 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 19:22:22,896 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:22:22,896 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 19:22:22,904 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 19:22:23,047 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 19:22:23,047 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:22:23,055 INFO ]: Computing forward predicates... [2018-06-22 19:22:23,454 INFO ]: Checked inductivity of 36 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-06-22 19:22:23,475 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:22:23,475 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2018-06-22 19:22:23,475 INFO ]: Interpolant automaton has 20 states [2018-06-22 19:22:23,475 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-22 19:22:23,476 INFO ]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2018-06-22 19:22:23,476 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 20 states. [2018-06-22 19:22:23,879 WARN ]: Spent 240.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2018-06-22 19:22:24,064 WARN ]: Spent 147.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 85 [2018-06-22 19:22:24,247 WARN ]: Spent 148.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 81 [2018-06-22 19:22:24,453 WARN ]: Spent 171.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2018-06-22 19:22:24,604 WARN ]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2018-06-22 19:22:24,651 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:22:24,651 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 19:22:24,656 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 19:22:24,656 INFO ]: Start accepts. Automaton has 20 states. Word has length 25 [2018-06-22 19:22:24,656 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:22:24,657 INFO ]: With dead ends: 21 [2018-06-22 19:22:24,657 INFO ]: Without dead ends: 21 [2018-06-22 19:22:24,657 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2018-06-22 19:22:24,657 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 19:22:24,663 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 19:22:24,663 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 19:22:24,663 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 19:22:24,663 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 19:22:24,664 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:22:24,664 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 19:22:24,664 INFO ]: Interpolant automaton has 20 states. [2018-06-22 19:22:24,664 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 19:22:24,664 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 19:22:24,664 INFO ]: Found error trace [2018-06-22 19:22:24,664 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:22:24,665 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:22:24,665 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 5 times [2018-06-22 19:22:24,665 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:22:24,665 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:22:24,665 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:22:24,666 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:22:24,666 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:22:24,836 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:22:25,580 WARN ]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-06-22 19:22:26,755 WARN ]: Spent 1.09 s on a formula simplification. DAG size of input: 94 DAG size of output: 21 [2018-06-22 19:22:27,179 WARN ]: Spent 395.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 29 [2018-06-22 19:22:27,478 WARN ]: Spent 261.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 28 [2018-06-22 19:22:27,866 WARN ]: Spent 228.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 35 [2018-06-22 19:22:28,227 WARN ]: Spent 253.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 15 [2018-06-22 19:22:28,659 WARN ]: Spent 229.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 21 [2018-06-22 19:22:29,300 WARN ]: Spent 574.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 19 [2018-06-22 19:22:29,850 WARN ]: Spent 494.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 12 [2018-06-22 19:22:29,864 INFO ]: Checked inductivity of 55 backedges. 1 proven. 39 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 19:22:29,864 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:22:29,864 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 19:22:29,874 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 19:22:30,146 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 19:22:30,146 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:22:30,156 INFO ]: Computing forward predicates... [2018-06-22 19:22:30,702 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 19:22:30,722 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:22:30,723 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2018-06-22 19:22:30,723 INFO ]: Interpolant automaton has 25 states [2018-06-22 19:22:30,723 INFO ]: Constructing interpolant automaton starting with 25 interpolants. [2018-06-22 19:22:30,723 INFO ]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2018-06-22 19:22:30,723 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 25 states. [2018-06-22 19:22:30,990 WARN ]: Spent 196.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 96 [2018-06-22 19:22:31,511 WARN ]: Spent 445.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 101 [2018-06-22 19:22:31,773 WARN ]: Spent 225.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 100 [2018-06-22 19:22:32,141 WARN ]: Spent 215.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 100 [2018-06-22 19:22:32,378 WARN ]: Spent 196.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 92 [2018-06-22 19:22:32,606 WARN ]: Spent 183.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 86 [2018-06-22 19:22:32,653 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:22:32,654 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 19:22:32,654 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 19:22:32,654 INFO ]: Start accepts. Automaton has 25 states. Word has length 29 [2018-06-22 19:22:32,655 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:22:32,655 INFO ]: With dead ends: 23 [2018-06-22 19:22:32,655 INFO ]: Without dead ends: 23 [2018-06-22 19:22:32,656 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2018-06-22 19:22:32,656 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 19:22:32,659 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 19:22:32,659 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 19:22:32,660 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 19:22:32,660 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 19:22:32,660 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:22:32,660 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 19:22:32,660 INFO ]: Interpolant automaton has 25 states. [2018-06-22 19:22:32,660 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 19:22:32,661 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 19:22:32,661 INFO ]: Found error trace [2018-06-22 19:22:32,661 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:22:32,661 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:22:32,661 INFO ]: Analyzing trace with hash -1661294575, now seen corresponding path program 6 times [2018-06-22 19:22:32,661 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:22:32,661 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:22:32,662 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:22:32,662 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:22:32,662 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:22:33,067 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:22:34,978 WARN ]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-06-22 19:22:38,042 WARN ]: Spent 2.82 s on a formula simplification. DAG size of input: 788 DAG size of output: 28 [2018-06-22 19:22:42,296 WARN ]: Spent 3.98 s on a formula simplification. DAG size of input: 727 DAG size of output: 28 [2018-06-22 19:22:47,717 WARN ]: Spent 4.83 s on a formula simplification. DAG size of input: 814 DAG size of output: 55 [2018-06-22 19:22:51,571 WARN ]: Spent 3.59 s on a formula simplification. DAG size of input: 787 DAG size of output: 31 [2018-06-22 19:22:54,516 WARN ]: Spent 2.67 s on a formula simplification. DAG size of input: 767 DAG size of output: 16 [2018-06-22 19:23:01,126 WARN ]: Spent 6.15 s on a formula simplification. DAG size of input: 1416 DAG size of output: 27 [2018-06-22 19:23:07,309 WARN ]: Spent 5.76 s on a formula simplification. DAG size of input: 926 DAG size of output: 17 [2018-06-22 19:23:15,368 WARN ]: Spent 7.46 s on a formula simplification. DAG size of input: 831 DAG size of output: 12 [2018-06-22 19:23:15,384 INFO ]: Checked inductivity of 78 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-06-22 19:23:15,384 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:23:15,384 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 19:23:15,390 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 19:23:15,671 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-22 19:23:15,671 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:23:15,681 INFO ]: Computing forward predicates... [2018-06-22 19:23:16,121 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 19:23:16,150 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:23:16,150 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2018-06-22 19:23:16,151 INFO ]: Interpolant automaton has 28 states [2018-06-22 19:23:16,151 INFO ]: Constructing interpolant automaton starting with 28 interpolants. [2018-06-22 19:23:16,151 INFO ]: CoverageRelationStatistics Valid=69, Invalid=687, Unknown=0, NotChecked=0, Total=756 [2018-06-22 19:23:16,151 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 28 states. [2018-06-22 19:23:16,441 WARN ]: Spent 199.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 97 [2018-06-22 19:23:16,736 WARN ]: Spent 249.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 111 [2018-06-22 19:23:17,025 WARN ]: Spent 250.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 111 [2018-06-22 19:23:17,312 WARN ]: Spent 249.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 112 [2018-06-22 19:23:17,575 WARN ]: Spent 219.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 102 [2018-06-22 19:23:17,824 WARN ]: Spent 201.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 95 [2018-06-22 19:23:18,098 WARN ]: Spent 190.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 92 [2018-06-22 19:23:18,333 WARN ]: Spent 184.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 90 [2018-06-22 19:23:18,414 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:23:18,414 INFO ]: Finished difference Result 27 states and 28 transitions. [2018-06-22 19:23:18,415 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 19:23:18,415 INFO ]: Start accepts. Automaton has 28 states. Word has length 33 [2018-06-22 19:23:18,416 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:23:18,416 INFO ]: With dead ends: 27 [2018-06-22 19:23:18,416 INFO ]: Without dead ends: 27 [2018-06-22 19:23:18,417 INFO ]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 41.8s TimeCoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2018-06-22 19:23:18,417 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-22 19:23:18,422 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-06-22 19:23:18,422 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-22 19:23:18,422 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-06-22 19:23:18,422 INFO ]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 33 [2018-06-22 19:23:18,423 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:23:18,423 INFO ]: Abstraction has 27 states and 28 transitions. [2018-06-22 19:23:18,423 INFO ]: Interpolant automaton has 28 states. [2018-06-22 19:23:18,423 INFO ]: Start isEmpty. Operand 27 states and 28 transitions. [2018-06-22 19:23:18,424 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 19:23:18,424 INFO ]: Found error trace [2018-06-22 19:23:18,426 INFO ]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:23:18,426 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:23:18,426 INFO ]: Analyzing trace with hash 1618126293, now seen corresponding path program 7 times [2018-06-22 19:23:18,426 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:23:18,426 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:23:18,426 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:23:18,426 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:23:18,426 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:23:19,711 INFO ]: Conjunction of SSA is unsat Received shutdown request... [2018-06-22 19:23:21,188 FATAL]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Timeout exceeded at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:215) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:201) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:919) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.getInterpolants(ManagedScript.java:199) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsTree(InterpolatingTraceCheckCraig.java:271) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:207) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructCraig(TraceCheckConstructor.java:210) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackRefinementStrategy.getTraceCheck(MultiTrackRefinementStrategy.java:228) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:220) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:194) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:410) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:425) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:367) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:309) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:151) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:119) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:324) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.runToolchainDefault(DefaultToolchainJob.java:221) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.BasicToolchainJob.run(BasicToolchainJob.java:134) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-06-22 19:23:21,192 INFO ]: Toolchain (without parser) took 67431.59 ms. Allocated memory was 303.0 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 244.6 MB in the beginning and 635.9 MB in the end (delta: -391.3 MB). Peak memory consumption was 802.5 MB. Max. memory is 3.6 GB. [2018-06-22 19:23:21,195 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 303.0 MB. Free memory is still 268.7 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 19:23:21,195 INFO ]: ChcToBoogie took 77.73 ms. Allocated memory is still 303.0 MB. Free memory was 244.6 MB in the beginning and 242.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 19:23:21,195 INFO ]: Boogie Preprocessor took 81.68 ms. Allocated memory is still 303.0 MB. Free memory was 242.6 MB in the beginning and 240.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 19:23:21,196 INFO ]: RCFGBuilder took 325.35 ms. Allocated memory is still 303.0 MB. Free memory was 240.6 MB in the beginning and 216.6 MB in the end (delta: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 3.6 GB. [2018-06-22 19:23:21,196 INFO ]: TraceAbstraction took 66929.17 ms. Allocated memory was 303.0 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 216.6 MB in the beginning and 635.9 MB in the end (delta: -419.2 MB). Peak memory consumption was 774.6 MB. Max. memory is 3.6 GB. [2018-06-22 19:23:21,198 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 303.0 MB. Free memory is still 268.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 77.73 ms. Allocated memory is still 303.0 MB. Free memory was 244.6 MB in the beginning and 242.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 81.68 ms. Allocated memory is still 303.0 MB. Free memory was 242.6 MB in the beginning and 240.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 325.35 ms. Allocated memory is still 303.0 MB. Free memory was 240.6 MB in the beginning and 216.6 MB in the end (delta: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 66929.17 ms. Allocated memory was 303.0 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 216.6 MB in the beginning and 635.9 MB in the end (delta: -419.2 MB). Peak memory consumption was 774.6 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Timeout exceeded de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Timeout exceeded: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:215) RESULT: Ultimate could not prove your program: Toolchain returned no result. Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/metros_4_e2_968_e4_801.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_19-23-21-210.csv Completed graceful shutdown