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_532.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 19:20:43,997 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 19:20:44,000 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 19:20:44,012 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 19:20:44,012 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 19:20:44,014 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 19:20:44,015 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 19:20:44,019 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 19:20:44,021 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 19:20:44,023 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 19:20:44,026 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 19:20:44,026 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 19:20:44,027 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 19:20:44,028 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 19:20:44,031 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 19:20:44,032 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 19:20:44,034 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 19:20:44,047 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 19:20:44,048 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 19:20:44,049 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 19:20:44,050 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 19:20:44,052 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 19:20:44,053 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 19:20:44,053 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 19:20:44,054 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 19:20:44,054 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 19:20:44,060 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 19:20:44,060 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 19:20:44,061 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 19:20:44,061 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 19:20:44,062 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 19:20:44,066 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 19:20:44,066 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 19:20:44,067 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 19:20:44,068 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 19:20:44,068 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 19:20:44,092 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 19:20:44,092 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 19:20:44,092 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 19:20:44,093 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 19:20:44,093 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 19:20:44,094 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 19:20:44,094 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 19:20:44,094 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 19:20:44,094 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 19:20:44,095 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 19:20:44,095 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 19:20:44,095 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 19:20:44,096 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 19:20:44,096 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 19:20:44,096 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 19:20:44,096 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 19:20:44,096 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 19:20:44,097 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 19:20:44,097 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 19:20:44,098 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 19:20:44,098 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 19:20:44,145 INFO ]: Repository-Root is: /tmp [2018-06-22 19:20:44,161 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 19:20:44,166 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 19:20:44,167 INFO ]: Initializing SmtParser... [2018-06-22 19:20:44,167 INFO ]: SmtParser initialized [2018-06-22 19:20:44,168 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_4_e2_532.smt2 [2018-06-22 19:20:44,170 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 19:20:44,245 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_4_e2_532.smt2 unknown [2018-06-22 19:20:44,720 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_4_e2_532.smt2 [2018-06-22 19:20:44,731 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 19:20:44,736 INFO ]: Walking toolchain with 4 elements. [2018-06-22 19:20:44,737 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 19:20:44,737 INFO ]: Initializing ChcToBoogie... [2018-06-22 19:20:44,737 INFO ]: ChcToBoogie initialized [2018-06-22 19:20:44,745 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:20:44" (1/1) ... [2018-06-22 19:20:44,819 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:20:44 Unit [2018-06-22 19:20:44,819 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 19:20:44,820 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 19:20:44,820 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 19:20:44,820 INFO ]: Boogie Preprocessor initialized [2018-06-22 19:20:44,842 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:20:44" (1/1) ... [2018-06-22 19:20:44,842 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:20:44" (1/1) ... [2018-06-22 19:20:44,860 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:20:44" (1/1) ... [2018-06-22 19:20:44,860 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:20:44" (1/1) ... [2018-06-22 19:20:44,865 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:20:44" (1/1) ... [2018-06-22 19:20:44,866 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:20:44" (1/1) ... [2018-06-22 19:20:44,868 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:20:44" (1/1) ... [2018-06-22 19:20:44,871 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 19:20:44,872 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 19:20:44,872 INFO ]: Initializing RCFGBuilder... [2018-06-22 19:20:44,872 INFO ]: RCFGBuilder initialized [2018-06-22 19:20:44,873 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:20:44" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-22 19:20:44,882 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 19:20:44,882 INFO ]: Found specification of procedure False [2018-06-22 19:20:44,882 INFO ]: Found implementation of procedure False [2018-06-22 19:20:44,882 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 19:20:44,882 INFO ]: Found specification of procedure state [2018-06-22 19:20:44,882 INFO ]: Found implementation of procedure state [2018-06-22 19:20:44,882 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 19:20:44,882 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 19:20:44,882 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 19:20:45,274 INFO ]: Using library mode [2018-06-22 19:20:45,274 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:20:45 BoogieIcfgContainer [2018-06-22 19:20:45,275 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 19:20:45,276 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 19:20:45,276 INFO ]: Initializing TraceAbstraction... [2018-06-22 19:20:45,279 INFO ]: TraceAbstraction initialized [2018-06-22 19:20:45,279 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:20:44" (1/3) ... [2018-06-22 19:20:45,280 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4642d027 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 07:20:45, skipping insertion in model container [2018-06-22 19:20:45,280 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:20:44" (2/3) ... [2018-06-22 19:20:45,280 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4642d027 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 07:20:45, skipping insertion in model container [2018-06-22 19:20:45,280 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:20:45" (3/3) ... [2018-06-22 19:20:45,282 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 19:20:45,293 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 19:20:45,303 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 19:20:45,348 INFO ]: Using default assertion order modulation [2018-06-22 19:20:45,349 INFO ]: Interprodecural is true [2018-06-22 19:20:45,349 INFO ]: Hoare is false [2018-06-22 19:20:45,349 INFO ]: Compute interpolants for FPandBP [2018-06-22 19:20:45,349 INFO ]: Backedges is TWOTRACK [2018-06-22 19:20:45,349 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 19:20:45,349 INFO ]: Difference is false [2018-06-22 19:20:45,349 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 19:20:45,349 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 19:20:45,367 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 19:20:45,388 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 19:20:45,389 INFO ]: Found error trace [2018-06-22 19:20:45,389 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:20:45,390 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:20:45,394 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 19:20:45,395 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:20:45,395 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:20:45,427 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:20:45,427 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:20:45,427 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:20:45,544 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:20:45,731 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 19:20:45,732 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 19:20:45,733 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 19:20:45,734 INFO ]: Interpolant automaton has 4 states [2018-06-22 19:20:45,748 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 19:20:45,749 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 19:20:45,751 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 19:20:45,895 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:20:45,895 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 19:20:45,896 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 19:20:45,897 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 19:20:45,897 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:20:45,911 INFO ]: With dead ends: 13 [2018-06-22 19:20:45,911 INFO ]: Without dead ends: 13 [2018-06-22 19:20:45,913 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 [2018-06-22 19:20:45,929 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 19:20:45,961 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 19:20:45,963 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 19:20:45,963 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 19:20:45,965 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 19:20:45,965 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:20:45,965 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 19:20:45,965 INFO ]: Interpolant automaton has 4 states. [2018-06-22 19:20:45,965 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 19:20:45,967 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 19:20:45,967 INFO ]: Found error trace [2018-06-22 19:20:45,967 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:20:45,967 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:20:45,967 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 19:20:45,967 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:20:45,967 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:20:45,968 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:20:45,968 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:20:45,968 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:20:46,061 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:20:46,432 WARN ]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 19:20:46,490 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:20:46,490 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:20:46,490 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 19:20:46,497 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:20:46,622 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:20:46,632 INFO ]: Computing forward predicates... [2018-06-22 19:20:46,994 WARN ]: Spent 167.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 7 [2018-06-22 19:20:47,287 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:20:47,323 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:20:47,323 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 19:20:47,323 INFO ]: Interpolant automaton has 9 states [2018-06-22 19:20:47,323 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 19:20:47,323 INFO ]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-06-22 19:20:47,324 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 19:20:47,619 WARN ]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 19:20:48,132 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:20:48,132 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 19:20:48,133 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 19:20:48,133 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 19:20:48,133 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:20:48,134 INFO ]: With dead ends: 15 [2018-06-22 19:20:48,134 INFO ]: Without dead ends: 15 [2018-06-22 19:20:48,135 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-06-22 19:20:48,135 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 19:20:48,137 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 19:20:48,137 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 19:20:48,138 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 19:20:48,139 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 19:20:48,140 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:20:48,140 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 19:20:48,140 INFO ]: Interpolant automaton has 9 states. [2018-06-22 19:20:48,140 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 19:20:48,140 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 19:20:48,140 INFO ]: Found error trace [2018-06-22 19:20:48,140 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:20:48,140 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:20:48,141 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 19:20:48,141 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:20:48,141 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:20:48,141 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:20:48,141 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:20:48,141 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:20:48,279 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:20:48,938 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:20:48,938 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:20:48,938 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) [2018-06-22 19:20:48,962 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 19:20:49,103 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 19:20:49,103 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:20:49,109 INFO ]: Computing forward predicates... [2018-06-22 19:20:49,430 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:20:49,449 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:20:49,450 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 19:20:49,450 INFO ]: Interpolant automaton has 13 states [2018-06-22 19:20:49,450 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 19:20:49,450 INFO ]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2018-06-22 19:20:49,450 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 19:20:49,730 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:20:49,730 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 19:20:49,731 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 19:20:49,731 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 19:20:49,731 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:20:49,732 INFO ]: With dead ends: 17 [2018-06-22 19:20:49,732 INFO ]: Without dead ends: 17 [2018-06-22 19:20:49,732 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2018-06-22 19:20:49,732 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 19:20:49,736 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 19:20:49,736 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 19:20:49,737 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 19:20:49,737 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 19:20:49,737 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:20:49,737 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 19:20:49,737 INFO ]: Interpolant automaton has 13 states. [2018-06-22 19:20:49,737 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 19:20:49,738 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 19:20:49,738 INFO ]: Found error trace [2018-06-22 19:20:49,738 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:20:49,738 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:20:49,738 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 19:20:49,738 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:20:49,739 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:20:49,739 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:20:49,739 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:20:49,739 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:20:49,867 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:20:50,456 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:20:50,456 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:20:50,456 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) [2018-06-22 19:20:50,472 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 19:20:50,636 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 19:20:50,636 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:20:50,644 INFO ]: Computing forward predicates... [2018-06-22 19:20:50,901 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:20:50,922 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:20:50,936 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-22 19:20:50,936 INFO ]: Interpolant automaton has 17 states [2018-06-22 19:20:50,936 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 19:20:50,937 INFO ]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2018-06-22 19:20:50,937 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-22 19:20:51,455 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:20:51,455 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 19:20:51,455 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 19:20:51,455 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-22 19:20:51,456 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:20:51,456 INFO ]: With dead ends: 19 [2018-06-22 19:20:51,456 INFO ]: Without dead ends: 19 [2018-06-22 19:20:51,457 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2018-06-22 19:20:51,457 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 19:20:51,459 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 19:20:51,460 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 19:20:51,460 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 19:20:51,460 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 19:20:51,460 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:20:51,460 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 19:20:51,460 INFO ]: Interpolant automaton has 17 states. [2018-06-22 19:20:51,460 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 19:20:51,461 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 19:20:51,461 INFO ]: Found error trace [2018-06-22 19:20:51,461 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:20:51,461 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:20:51,461 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-22 19:20:51,461 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:20:51,461 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:20:51,462 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:20:51,462 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:20:51,463 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:20:51,601 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:20:52,020 WARN ]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 19:20:52,416 WARN ]: Spent 313.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2018-06-22 19:20:52,548 WARN ]: Spent 121.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 27 [2018-06-22 19:20:52,949 WARN ]: Spent 171.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 25 [2018-06-22 19:20:53,253 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 19:20:53,253 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:20:53,253 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 19:20:53,259 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 19:20:53,445 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 19:20:53,445 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:20:53,453 INFO ]: Computing forward predicates... [2018-06-22 19:20:54,076 INFO ]: Checked inductivity of 36 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-06-22 19:20:54,098 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:20:54,098 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2018-06-22 19:20:54,098 INFO ]: Interpolant automaton has 20 states [2018-06-22 19:20:54,099 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-22 19:20:54,099 INFO ]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2018-06-22 19:20:54,099 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 20 states. [2018-06-22 19:20:54,281 WARN ]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2018-06-22 19:20:54,479 WARN ]: Spent 158.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2018-06-22 19:20:54,716 WARN ]: Spent 184.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2018-06-22 19:20:54,881 WARN ]: Spent 117.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2018-06-22 19:20:55,049 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:20:55,049 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 19:20:55,050 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 19:20:55,050 INFO ]: Start accepts. Automaton has 20 states. Word has length 25 [2018-06-22 19:20:55,050 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:20:55,050 INFO ]: With dead ends: 21 [2018-06-22 19:20:55,050 INFO ]: Without dead ends: 21 [2018-06-22 19:20:55,051 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2018-06-22 19:20:55,051 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 19:20:55,054 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 19:20:55,054 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 19:20:55,054 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 19:20:55,054 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 19:20:55,055 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:20:55,055 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 19:20:55,055 INFO ]: Interpolant automaton has 20 states. [2018-06-22 19:20:55,055 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 19:20:55,055 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 19:20:55,056 INFO ]: Found error trace [2018-06-22 19:20:55,056 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:20:55,056 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:20:55,056 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 5 times [2018-06-22 19:20:55,056 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:20:55,056 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:20:55,057 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:20:55,057 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:20:55,057 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:20:55,315 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:20:56,681 WARN ]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 19:20:57,398 WARN ]: Spent 607.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 26 [2018-06-22 19:20:57,602 WARN ]: Spent 175.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 19 [2018-06-22 19:20:57,984 WARN ]: Spent 352.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 34 [2018-06-22 19:20:58,729 WARN ]: Spent 548.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 63 [2018-06-22 19:20:59,166 WARN ]: Spent 316.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 39 [2018-06-22 19:20:59,528 WARN ]: Spent 294.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 13 [2018-06-22 19:21:00,173 WARN ]: Spent 525.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 18 [2018-06-22 19:21:00,598 WARN ]: Spent 334.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 16 [2018-06-22 19:21:00,615 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 19:21:00,615 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:21:00,615 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 19:21:00,623 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 19:21:00,863 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 19:21:00,863 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:21:00,872 INFO ]: Computing forward predicates... [2018-06-22 19:21:01,251 INFO ]: Checked inductivity of 55 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-06-22 19:21:01,273 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:21:01,274 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2018-06-22 19:21:01,274 INFO ]: Interpolant automaton has 24 states [2018-06-22 19:21:01,274 INFO ]: Constructing interpolant automaton starting with 24 interpolants. [2018-06-22 19:21:01,274 INFO ]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2018-06-22 19:21:01,274 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 24 states. [2018-06-22 19:21:01,572 WARN ]: Spent 214.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 121 [2018-06-22 19:21:01,921 WARN ]: Spent 297.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 131 [2018-06-22 19:21:02,524 WARN ]: Spent 424.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 119 [2018-06-22 19:21:02,807 WARN ]: Spent 246.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 132 [2018-06-22 19:21:03,219 WARN ]: Spent 368.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 132 [2018-06-22 19:21:03,493 WARN ]: Spent 224.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 126 [2018-06-22 19:21:03,786 WARN ]: Spent 232.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 119 [2018-06-22 19:21:04,031 WARN ]: Spent 192.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 111 [2018-06-22 19:21:04,078 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:21:04,078 INFO ]: Finished difference Result 27 states and 28 transitions. [2018-06-22 19:21:04,080 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 19:21:04,080 INFO ]: Start accepts. Automaton has 24 states. Word has length 29 [2018-06-22 19:21:04,081 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:21:04,081 INFO ]: With dead ends: 27 [2018-06-22 19:21:04,081 INFO ]: Without dead ends: 27 [2018-06-22 19:21:04,082 INFO ]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=220, Invalid=836, Unknown=0, NotChecked=0, Total=1056 [2018-06-22 19:21:04,082 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-22 19:21:04,085 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-06-22 19:21:04,085 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-22 19:21:04,086 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-06-22 19:21:04,086 INFO ]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 29 [2018-06-22 19:21:04,086 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:21:04,086 INFO ]: Abstraction has 27 states and 28 transitions. [2018-06-22 19:21:04,086 INFO ]: Interpolant automaton has 24 states. [2018-06-22 19:21:04,086 INFO ]: Start isEmpty. Operand 27 states and 28 transitions. [2018-06-22 19:21:04,087 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 19:21:04,087 INFO ]: Found error trace [2018-06-22 19:21:04,088 INFO ]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:21:04,096 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:21:04,096 INFO ]: Analyzing trace with hash 1618126293, now seen corresponding path program 6 times [2018-06-22 19:21:04,096 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:21:04,096 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:21:04,099 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:21:04,099 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:21:04,099 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:21:08,514 INFO ]: Conjunction of SSA is unsat Received shutdown request... [2018-06-22 19:21:40,503 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-22 19:21:42,183 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-22 19:21:43,068 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-22 19:21:43,344 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-22 19:21:43,858 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-22 19:21:44,062 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-22 19:21:44,339 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-22 19:21:44,531 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-22 19:21:44,737 WARN ]: Unable to check validity of interpolant: cancelled Cannot interrupt operation gracefully because timeout expired. Forcing shutdown