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/conc/stateful01_safe_v1.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:47:09,918 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:47:09,920 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:47:09,933 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:47:09,934 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:47:09,935 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:47:09,936 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:47:09,940 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:47:09,941 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:47:09,943 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:47:09,944 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:47:09,944 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:47:09,945 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:47:09,946 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:47:09,946 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:47:09,949 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:47:09,951 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:47:09,963 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:47:09,965 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:47:09,965 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:47:09,966 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:47:09,968 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:47:09,969 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:47:09,969 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:47:09,969 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:47:09,970 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:47:09,976 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:47:09,977 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:47:09,978 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:47:09,978 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:47:09,979 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:47:09,979 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:47:09,979 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:47:09,980 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:47:09,981 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:47:09,981 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 14:47:10,004 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:47:10,004 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:47:10,005 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:47:10,005 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:47:10,006 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:47:10,006 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:47:10,007 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:47:10,007 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:47:10,007 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:47:10,007 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:47:10,008 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:47:10,008 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:47:10,008 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:47:10,008 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:47:10,008 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:47:10,009 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:47:10,010 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:47:10,010 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:47:10,010 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:47:10,011 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:47:10,011 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:47:10,059 INFO ]: Repository-Root is: /tmp [2018-06-22 14:47:10,072 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:47:10,075 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:47:10,076 INFO ]: Initializing SmtParser... [2018-06-22 14:47:10,076 INFO ]: SmtParser initialized [2018-06-22 14:47:10,077 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/conc/stateful01_safe_v1.smt2 [2018-06-22 14:47:10,078 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 14:47:10,175 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/conc/stateful01_safe_v1.smt2 unknown [2018-06-22 14:47:10,495 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/conc/stateful01_safe_v1.smt2 [2018-06-22 14:47:10,499 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:47:10,505 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:47:10,506 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:47:10,506 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:47:10,506 INFO ]: ChcToBoogie initialized [2018-06-22 14:47:10,509 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:47:10" (1/1) ... [2018-06-22 14:47:10,564 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:47:10 Unit [2018-06-22 14:47:10,564 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:47:10,565 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:47:10,565 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:47:10,565 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:47:10,583 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:47:10" (1/1) ... [2018-06-22 14:47:10,583 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:47:10" (1/1) ... [2018-06-22 14:47:10,593 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:47:10" (1/1) ... [2018-06-22 14:47:10,603 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:47:10" (1/1) ... [2018-06-22 14:47:10,607 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:47:10" (1/1) ... [2018-06-22 14:47:10,608 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:47:10" (1/1) ... [2018-06-22 14:47:10,618 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:47:10" (1/1) ... [2018-06-22 14:47:10,620 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:47:10,621 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:47:10,621 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:47:10,621 INFO ]: RCFGBuilder initialized [2018-06-22 14:47:10,622 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:47:10" (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 14:47:10,638 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:47:10,638 INFO ]: Found specification of procedure False [2018-06-22 14:47:10,638 INFO ]: Found implementation of procedure False [2018-06-22 14:47:10,638 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:47:10,638 INFO ]: Found specification of procedure state [2018-06-22 14:47:10,638 INFO ]: Found implementation of procedure state [2018-06-22 14:47:10,638 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:47:10,638 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:47:10,639 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 14:47:10,946 INFO ]: Using library mode [2018-06-22 14:47:10,947 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:47:10 BoogieIcfgContainer [2018-06-22 14:47:10,947 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:47:10,948 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:47:10,948 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:47:10,951 INFO ]: TraceAbstraction initialized [2018-06-22 14:47:10,952 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:47:10" (1/3) ... [2018-06-22 14:47:10,953 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3560880e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:47:10, skipping insertion in model container [2018-06-22 14:47:10,953 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:47:10" (2/3) ... [2018-06-22 14:47:10,953 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3560880e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:47:10, skipping insertion in model container [2018-06-22 14:47:10,953 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:47:10" (3/3) ... [2018-06-22 14:47:10,967 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:47:10,981 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:47:10,991 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:47:11,030 INFO ]: Using default assertion order modulation [2018-06-22 14:47:11,031 INFO ]: Interprodecural is true [2018-06-22 14:47:11,031 INFO ]: Hoare is false [2018-06-22 14:47:11,031 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:47:11,031 INFO ]: Backedges is TWOTRACK [2018-06-22 14:47:11,031 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:47:11,031 INFO ]: Difference is false [2018-06-22 14:47:11,031 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:47:11,031 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:47:11,046 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:47:11,056 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:47:11,056 INFO ]: Found error trace [2018-06-22 14:47:11,057 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:47:11,057 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:47:11,061 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 14:47:11,062 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:47:11,062 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:47:11,094 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:47:11,094 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:47:11,094 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:47:11,141 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:47:11,264 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:47:11,265 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:47:11,265 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:47:11,266 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:47:11,277 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:47:11,278 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:47:11,279 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:47:11,390 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:47:11,390 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:47:11,391 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:47:11,392 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:47:11,393 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:47:11,410 INFO ]: With dead ends: 13 [2018-06-22 14:47:11,410 INFO ]: Without dead ends: 13 [2018-06-22 14:47:11,411 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 14:47:11,424 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:47:11,442 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:47:11,443 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:47:11,443 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:47:11,444 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:47:11,444 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:47:11,444 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:47:11,444 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:47:11,444 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:47:11,445 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:47:11,445 INFO ]: Found error trace [2018-06-22 14:47:11,446 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:47:11,446 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:47:11,446 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 14:47:11,446 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:47:11,446 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:47:11,447 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:47:11,447 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:47:11,447 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:47:11,518 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:47:11,893 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:47:11,893 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:47:11,893 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 14:47:11,909 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:47:11,972 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:47:11,983 INFO ]: Computing forward predicates... [2018-06-22 14:47:13,027 WARN ]: Spent 193.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 6 [2018-06-22 14:47:13,140 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:47:13,160 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:47:13,161 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 14:47:13,161 INFO ]: Interpolant automaton has 10 states [2018-06-22 14:47:13,161 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 14:47:13,161 INFO ]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-06-22 14:47:13,162 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 10 states. [2018-06-22 14:47:13,612 WARN ]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-22 14:47:13,980 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:47:13,980 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 14:47:13,982 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 14:47:13,982 INFO ]: Start accepts. Automaton has 10 states. Word has length 13 [2018-06-22 14:47:13,982 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:47:13,983 INFO ]: With dead ends: 15 [2018-06-22 14:47:13,983 INFO ]: Without dead ends: 15 [2018-06-22 14:47:13,984 INFO ]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2018-06-22 14:47:13,984 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 14:47:13,989 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 14:47:13,989 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 14:47:13,990 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 14:47:13,990 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 14:47:13,990 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:47:13,990 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 14:47:13,990 INFO ]: Interpolant automaton has 10 states. [2018-06-22 14:47:13,990 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 14:47:13,991 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 14:47:13,991 INFO ]: Found error trace [2018-06-22 14:47:13,991 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:47:13,991 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:47:13,991 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 14:47:13,991 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:47:13,991 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:47:13,992 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:47:13,992 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:47:13,992 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:47:14,068 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:47:14,558 WARN ]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-22 14:47:14,629 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:47:14,629 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:47:14,629 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 14:47:14,638 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 14:47:14,710 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:47:14,711 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:47:14,715 INFO ]: Computing forward predicates... [2018-06-22 14:47:15,357 WARN ]: Spent 259.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2018-06-22 14:47:15,543 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:47:15,562 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:47:15,562 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-06-22 14:47:15,563 INFO ]: Interpolant automaton has 14 states [2018-06-22 14:47:15,563 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-22 14:47:15,563 INFO ]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2018-06-22 14:47:15,563 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 14 states. [2018-06-22 14:47:15,725 WARN ]: Spent 105.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2018-06-22 14:47:15,906 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:47:15,906 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 14:47:15,906 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:47:15,906 INFO ]: Start accepts. Automaton has 14 states. Word has length 17 [2018-06-22 14:47:15,906 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:47:15,907 INFO ]: With dead ends: 17 [2018-06-22 14:47:15,907 INFO ]: Without dead ends: 17 [2018-06-22 14:47:15,907 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2018-06-22 14:47:15,907 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 14:47:15,910 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 14:47:15,910 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 14:47:15,910 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 14:47:15,911 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 14:47:15,911 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:47:15,911 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 14:47:15,911 INFO ]: Interpolant automaton has 14 states. [2018-06-22 14:47:15,911 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 14:47:15,911 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 14:47:15,911 INFO ]: Found error trace [2018-06-22 14:47:15,911 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:47:15,912 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:47:15,912 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 14:47:15,912 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:47:15,912 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:47:15,913 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:47:15,913 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:47:15,913 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:47:15,969 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:47:16,273 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:47:16,273 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:47:16,273 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 14:47:16,287 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 14:47:16,365 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 14:47:16,365 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:47:16,369 INFO ]: Computing forward predicates... [2018-06-22 14:47:17,299 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:47:17,325 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:47:17,325 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2018-06-22 14:47:17,325 INFO ]: Interpolant automaton has 18 states [2018-06-22 14:47:17,325 INFO ]: Constructing interpolant automaton starting with 18 interpolants. [2018-06-22 14:47:17,325 INFO ]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2018-06-22 14:47:17,326 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 18 states. [2018-06-22 14:47:17,581 WARN ]: Spent 179.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2018-06-22 14:47:17,846 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:47:17,846 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 14:47:17,846 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 14:47:17,846 INFO ]: Start accepts. Automaton has 18 states. Word has length 21 [2018-06-22 14:47:17,846 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:47:17,847 INFO ]: With dead ends: 19 [2018-06-22 14:47:17,847 INFO ]: Without dead ends: 19 [2018-06-22 14:47:17,847 INFO ]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2018-06-22 14:47:17,847 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 14:47:17,851 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 14:47:17,851 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 14:47:17,851 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 14:47:17,851 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 14:47:17,852 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:47:17,852 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 14:47:17,852 INFO ]: Interpolant automaton has 18 states. [2018-06-22 14:47:17,852 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 14:47:17,852 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 14:47:17,852 INFO ]: Found error trace [2018-06-22 14:47:17,852 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:47:17,852 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:47:17,853 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-22 14:47:17,853 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:47:17,853 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:47:17,853 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:47:17,853 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:47:17,853 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:47:17,909 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:47:19,300 WARN ]: Spent 1.10 s on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-06-22 14:47:19,458 WARN ]: Spent 140.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2018-06-22 14:47:19,618 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 14:47:19,619 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:47:19,619 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 14:47:19,626 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 14:47:19,690 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 14:47:19,690 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:47:19,694 INFO ]: Computing forward predicates... [2018-06-22 14:47:20,219 WARN ]: Spent 392.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 30 [2018-06-22 14:47:20,462 WARN ]: Spent 136.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 21 [2018-06-22 14:47:20,678 WARN ]: Spent 149.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 15 [2018-06-22 14:47:22,028 WARN ]: Spent 433.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 9 [2018-06-22 14:47:22,722 WARN ]: Spent 322.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 6 [2018-06-22 14:47:23,817 WARN ]: Spent 644.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 9 [2018-06-22 14:47:23,839 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 14:47:23,869 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:47:23,870 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2018-06-22 14:47:23,870 INFO ]: Interpolant automaton has 22 states [2018-06-22 14:47:23,870 INFO ]: Constructing interpolant automaton starting with 22 interpolants. [2018-06-22 14:47:23,870 INFO ]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2018-06-22 14:47:23,870 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 22 states. [2018-06-22 14:47:24,182 WARN ]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 14:47:24,390 WARN ]: Spent 152.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2018-06-22 14:47:24,719 WARN ]: Spent 218.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2018-06-22 14:47:24,951 WARN ]: Spent 210.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2018-06-22 14:47:25,113 WARN ]: Spent 141.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2018-06-22 14:47:25,145 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:47:25,145 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 14:47:25,145 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 14:47:25,145 INFO ]: Start accepts. Automaton has 22 states. Word has length 25 [2018-06-22 14:47:25,145 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:47:25,146 INFO ]: With dead ends: 21 [2018-06-22 14:47:25,146 INFO ]: Without dead ends: 21 [2018-06-22 14:47:25,146 INFO ]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2018-06-22 14:47:25,147 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 14:47:25,149 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 14:47:25,149 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 14:47:25,150 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 14:47:25,150 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 14:47:25,151 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:47:25,151 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 14:47:25,151 INFO ]: Interpolant automaton has 22 states. [2018-06-22 14:47:25,151 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 14:47:25,152 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 14:47:25,152 INFO ]: Found error trace [2018-06-22 14:47:25,152 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:47:25,152 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:47:25,152 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 5 times [2018-06-22 14:47:25,152 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:47:25,152 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:47:25,153 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:47:25,153 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:47:25,153 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:47:25,245 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:47:25,755 WARN ]: Spent 172.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 26 [2018-06-22 14:47:26,078 WARN ]: Spent 277.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 24 [2018-06-22 14:47:26,282 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 14:47:26,282 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:47:26,282 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 14:47:26,291 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 14:47:26,372 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 14:47:26,372 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:47:26,377 INFO ]: Computing forward predicates... [2018-06-22 14:47:26,953 WARN ]: Spent 403.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 36 [2018-06-22 14:47:27,522 WARN ]: Spent 362.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 46 [2018-06-22 14:47:27,715 WARN ]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 21 [2018-06-22 14:47:28,148 WARN ]: Spent 312.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 30 [2018-06-22 14:47:28,394 INFO ]: Checked inductivity of 55 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 14:47:28,413 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:47:28,413 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2018-06-22 14:47:28,413 INFO ]: Interpolant automaton has 26 states [2018-06-22 14:47:28,414 INFO ]: Constructing interpolant automaton starting with 26 interpolants. [2018-06-22 14:47:28,414 INFO ]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2018-06-22 14:47:28,414 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 26 states. [2018-06-22 14:47:28,839 WARN ]: Spent 361.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 60 [2018-06-22 14:47:29,087 WARN ]: Spent 219.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 36 [2018-06-22 14:47:29,565 WARN ]: Spent 343.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 43 [2018-06-22 14:47:29,965 WARN ]: Spent 324.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 47 [2018-06-22 14:47:30,301 WARN ]: Spent 307.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 59 [2018-06-22 14:47:30,650 WARN ]: Spent 317.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2018-06-22 14:47:30,697 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:47:30,697 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 14:47:30,697 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 14:47:30,697 INFO ]: Start accepts. Automaton has 26 states. Word has length 29 [2018-06-22 14:47:30,697 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:47:30,698 INFO ]: With dead ends: 23 [2018-06-22 14:47:30,698 INFO ]: Without dead ends: 23 [2018-06-22 14:47:30,698 INFO ]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=239, Invalid=883, Unknown=0, NotChecked=0, Total=1122 [2018-06-22 14:47:30,699 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 14:47:30,702 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 14:47:30,702 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 14:47:30,702 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 14:47:30,702 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 14:47:30,703 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:47:30,703 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 14:47:30,703 INFO ]: Interpolant automaton has 26 states. [2018-06-22 14:47:30,703 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 14:47:30,703 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 14:47:30,703 INFO ]: Found error trace [2018-06-22 14:47:30,703 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:47:30,703 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:47:30,704 INFO ]: Analyzing trace with hash -1661294575, now seen corresponding path program 6 times [2018-06-22 14:47:30,704 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:47:30,704 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:47:30,704 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:47:30,704 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:47:30,704 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:47:30,787 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:47:31,099 WARN ]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 14:47:31,672 WARN ]: Spent 503.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 20 [2018-06-22 14:47:31,922 WARN ]: Spent 239.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 32 [2018-06-22 14:47:32,098 WARN ]: Spent 165.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 34 [2018-06-22 14:47:32,320 WARN ]: Spent 190.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2018-06-22 14:47:32,704 WARN ]: Spent 236.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 21 [2018-06-22 14:47:33,198 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 14:47:33,198 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:47:33,198 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 14:47:33,204 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 14:47:33,295 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-22 14:47:33,295 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:47:33,303 INFO ]: Computing forward predicates... [2018-06-22 14:47:33,519 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 14:47:33,528 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 14:47:33,548 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 14:47:33,565 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 14:47:33,647 WARN ]: Simplifying disjunction of 20202 conjuctions. This might take some time... [2018-06-22 14:47:54,371 INFO ]: Simplified to disjunction of 20202 conjuctions. [2018-06-22 14:48:13,124 WARN ]: Spent 4.15 s on a formula simplification. DAG size of input: 426 DAG size of output: 60 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown