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/ctigar/substring1.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 15:38:40,865 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 15:38:40,867 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 15:38:40,929 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 15:38:40,930 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 15:38:40,930 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 15:38:40,931 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 15:38:40,934 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 15:38:40,935 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 15:38:40,936 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 15:38:40,937 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 15:38:40,937 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 15:38:40,945 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 15:38:40,946 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 15:38:40,947 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 15:38:40,948 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 15:38:40,949 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 15:38:40,951 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 15:38:40,952 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 15:38:40,953 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 15:38:40,955 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 15:38:40,957 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 15:38:40,957 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 15:38:40,957 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 15:38:40,958 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 15:38:40,959 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 15:38:40,960 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 15:38:40,960 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 15:38:40,961 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 15:38:40,961 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 15:38:40,962 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 15:38:40,963 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 15:38:40,963 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 15:38:40,964 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 15:38:40,964 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 15:38:40,964 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 15:38:40,978 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 15:38:40,978 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 15:38:40,978 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 15:38:40,978 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 15:38:40,979 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 15:38:40,979 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 15:38:40,980 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 15:38:40,980 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 15:38:40,980 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 15:38:40,980 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 15:38:40,980 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:38:40,981 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 15:38:40,981 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 15:38:40,981 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 15:38:40,981 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 15:38:40,981 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 15:38:40,982 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 15:38:40,982 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 15:38:40,982 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 15:38:40,984 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 15:38:40,984 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 15:38:41,040 INFO ]: Repository-Root is: /tmp [2018-06-22 15:38:41,055 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 15:38:41,060 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 15:38:41,062 INFO ]: Initializing SmtParser... [2018-06-22 15:38:41,062 INFO ]: SmtParser initialized [2018-06-22 15:38:41,063 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/substring1.c.smt2 [2018-06-22 15:38:41,064 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 15:38:41,158 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/substring1.c.smt2 unknown [2018-06-22 15:38:41,449 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/substring1.c.smt2 [2018-06-22 15:38:41,454 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 15:38:41,462 INFO ]: Walking toolchain with 4 elements. [2018-06-22 15:38:41,462 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 15:38:41,462 INFO ]: Initializing ChcToBoogie... [2018-06-22 15:38:41,462 INFO ]: ChcToBoogie initialized [2018-06-22 15:38:41,465 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:38:41" (1/1) ... [2018-06-22 15:38:41,514 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:38:41 Unit [2018-06-22 15:38:41,514 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 15:38:41,514 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 15:38:41,514 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 15:38:41,514 INFO ]: Boogie Preprocessor initialized [2018-06-22 15:38:41,537 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:38:41" (1/1) ... [2018-06-22 15:38:41,537 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:38:41" (1/1) ... [2018-06-22 15:38:41,549 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:38:41" (1/1) ... [2018-06-22 15:38:41,549 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:38:41" (1/1) ... [2018-06-22 15:38:41,553 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:38:41" (1/1) ... [2018-06-22 15:38:41,554 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:38:41" (1/1) ... [2018-06-22 15:38:41,556 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:38:41" (1/1) ... [2018-06-22 15:38:41,557 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 15:38:41,558 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 15:38:41,558 INFO ]: Initializing RCFGBuilder... [2018-06-22 15:38:41,558 INFO ]: RCFGBuilder initialized [2018-06-22 15:38:41,559 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:38:41" (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 15:38:41,574 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 15:38:41,574 INFO ]: Found specification of procedure False [2018-06-22 15:38:41,574 INFO ]: Found implementation of procedure False [2018-06-22 15:38:41,574 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 15:38:41,574 INFO ]: Found specification of procedure state [2018-06-22 15:38:41,574 INFO ]: Found implementation of procedure state [2018-06-22 15:38:41,574 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 15:38:41,574 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 15:38:41,574 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 15:38:41,762 INFO ]: Using library mode [2018-06-22 15:38:41,763 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:38:41 BoogieIcfgContainer [2018-06-22 15:38:41,763 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 15:38:41,765 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 15:38:41,765 INFO ]: Initializing TraceAbstraction... [2018-06-22 15:38:41,772 INFO ]: TraceAbstraction initialized [2018-06-22 15:38:41,772 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:38:41" (1/3) ... [2018-06-22 15:38:41,773 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d6b9579 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 03:38:41, skipping insertion in model container [2018-06-22 15:38:41,773 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:38:41" (2/3) ... [2018-06-22 15:38:41,773 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d6b9579 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 03:38:41, skipping insertion in model container [2018-06-22 15:38:41,773 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:38:41" (3/3) ... [2018-06-22 15:38:41,776 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 15:38:41,786 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 15:38:41,793 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 15:38:41,835 INFO ]: Using default assertion order modulation [2018-06-22 15:38:41,836 INFO ]: Interprodecural is true [2018-06-22 15:38:41,836 INFO ]: Hoare is false [2018-06-22 15:38:41,836 INFO ]: Compute interpolants for FPandBP [2018-06-22 15:38:41,836 INFO ]: Backedges is TWOTRACK [2018-06-22 15:38:41,836 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 15:38:41,836 INFO ]: Difference is false [2018-06-22 15:38:41,836 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 15:38:41,836 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 15:38:41,855 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 15:38:41,865 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 15:38:41,865 INFO ]: Found error trace [2018-06-22 15:38:41,866 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:38:41,866 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:38:41,872 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 15:38:41,874 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:38:41,875 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:38:41,907 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:38:41,907 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:38:41,907 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:38:41,933 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:38:42,043 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 15:38:42,045 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 15:38:42,045 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 15:38:42,047 INFO ]: Interpolant automaton has 4 states [2018-06-22 15:38:42,062 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 15:38:42,063 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:38:42,065 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 15:38:42,165 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:38:42,165 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 15:38:42,165 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 15:38:42,166 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 15:38:42,166 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:38:42,178 INFO ]: With dead ends: 13 [2018-06-22 15:38:42,178 INFO ]: Without dead ends: 13 [2018-06-22 15:38:42,179 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 15:38:42,192 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 15:38:42,219 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 15:38:42,220 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 15:38:42,221 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 15:38:42,222 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 15:38:42,222 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:38:42,222 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 15:38:42,223 INFO ]: Interpolant automaton has 4 states. [2018-06-22 15:38:42,223 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 15:38:42,224 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 15:38:42,224 INFO ]: Found error trace [2018-06-22 15:38:42,224 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:38:42,224 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:38:42,224 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 15:38:42,224 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:38:42,224 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:38:42,225 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:38:42,225 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:38:42,225 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:38:42,285 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:38:42,525 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:38:42,525 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:38:42,525 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 15:38:42,537 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:38:42,586 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:38:42,596 INFO ]: Computing forward predicates... [2018-06-22 15:38:42,787 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:38:42,824 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:38:42,824 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-06-22 15:38:42,824 INFO ]: Interpolant automaton has 6 states [2018-06-22 15:38:42,825 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 15:38:42,825 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 15:38:42,825 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 6 states. [2018-06-22 15:38:42,962 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:38:42,962 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 15:38:42,963 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 15:38:42,963 INFO ]: Start accepts. Automaton has 6 states. Word has length 13 [2018-06-22 15:38:42,963 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:38:42,963 INFO ]: With dead ends: 15 [2018-06-22 15:38:42,963 INFO ]: Without dead ends: 15 [2018-06-22 15:38:42,964 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 15:38:42,964 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 15:38:42,969 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 15:38:42,969 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 15:38:42,970 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 15:38:42,970 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 15:38:42,970 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:38:42,970 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 15:38:42,970 INFO ]: Interpolant automaton has 6 states. [2018-06-22 15:38:42,970 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 15:38:42,971 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 15:38:42,971 INFO ]: Found error trace [2018-06-22 15:38:42,971 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:38:42,971 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:38:42,971 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 15:38:42,971 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:38:42,971 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:38:42,972 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:38:42,972 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:38:42,972 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:38:43,050 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:38:43,427 WARN ]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-06-22 15:38:43,824 WARN ]: Spent 336.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2018-06-22 15:38:44,210 WARN ]: Spent 280.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 9 [2018-06-22 15:38:44,223 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:38:44,223 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:38:44,223 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 15:38:44,234 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:38:44,282 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:38:44,282 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:38:44,285 INFO ]: Computing forward predicates... [2018-06-22 15:38:44,744 WARN ]: Spent 265.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 8 [2018-06-22 15:38:45,204 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:38:45,226 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:38:45,226 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-06-22 15:38:45,226 INFO ]: Interpolant automaton has 11 states [2018-06-22 15:38:45,226 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-22 15:38:45,226 INFO ]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-06-22 15:38:45,227 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-06-22 15:38:45,556 WARN ]: Spent 137.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2018-06-22 15:38:45,580 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:38:45,580 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 15:38:45,581 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 15:38:45,581 INFO ]: Start accepts. Automaton has 11 states. Word has length 17 [2018-06-22 15:38:45,581 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:38:45,582 INFO ]: With dead ends: 17 [2018-06-22 15:38:45,582 INFO ]: Without dead ends: 17 [2018-06-22 15:38:45,584 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2018-06-22 15:38:45,584 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 15:38:45,586 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 15:38:45,587 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 15:38:45,587 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 15:38:45,587 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 15:38:45,587 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:38:45,587 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 15:38:45,587 INFO ]: Interpolant automaton has 11 states. [2018-06-22 15:38:45,587 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 15:38:45,588 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 15:38:45,588 INFO ]: Found error trace [2018-06-22 15:38:45,588 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:38:45,588 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:38:45,588 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 15:38:45,588 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:38:45,588 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:38:45,589 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:38:45,589 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:38:45,589 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:38:45,623 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:38:46,188 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:38:46,188 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:38:46,188 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 15:38:46,197 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 15:38:46,234 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 15:38:46,234 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:38:46,238 INFO ]: Computing forward predicates... [2018-06-22 15:38:46,661 WARN ]: Spent 315.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 13 [2018-06-22 15:38:47,116 WARN ]: Spent 245.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2018-06-22 15:38:47,201 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:38:47,225 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:38:47,225 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2018-06-22 15:38:47,225 INFO ]: Interpolant automaton has 14 states [2018-06-22 15:38:47,225 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-22 15:38:47,226 INFO ]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2018-06-22 15:38:47,226 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 14 states. [2018-06-22 15:38:47,411 WARN ]: Spent 160.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2018-06-22 15:38:47,596 WARN ]: Spent 117.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2018-06-22 15:38:47,737 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:38:47,737 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 15:38:47,738 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 15:38:47,738 INFO ]: Start accepts. Automaton has 14 states. Word has length 21 [2018-06-22 15:38:47,738 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:38:47,738 INFO ]: With dead ends: 19 [2018-06-22 15:38:47,738 INFO ]: Without dead ends: 19 [2018-06-22 15:38:47,739 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2018-06-22 15:38:47,739 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 15:38:47,742 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 15:38:47,742 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 15:38:47,743 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 15:38:47,743 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 15:38:47,743 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:38:47,743 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 15:38:47,743 INFO ]: Interpolant automaton has 14 states. [2018-06-22 15:38:47,743 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 15:38:47,744 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 15:38:47,744 INFO ]: Found error trace [2018-06-22 15:38:47,744 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:38:47,744 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:38:47,744 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-22 15:38:47,744 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:38:47,744 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:38:47,745 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:38:47,745 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:38:47,745 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:38:47,782 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:38:48,252 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:38:48,252 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:38:48,252 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 15:38:48,263 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 15:38:48,299 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 15:38:48,299 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:38:48,304 INFO ]: Computing forward predicates... [2018-06-22 15:38:57,781 WARN ]: Spent 7.40 s on a formula simplification. DAG size of input: 789 DAG size of output: 6 [2018-06-22 15:38:57,980 WARN ]: Spent 115.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 22 [2018-06-22 15:38:59,599 WARN ]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-22 15:38:59,752 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:38:59,772 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:38:59,772 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2018-06-22 15:38:59,773 INFO ]: Interpolant automaton has 17 states [2018-06-22 15:38:59,773 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 15:38:59,773 INFO ]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2018-06-22 15:38:59,773 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 17 states. [2018-06-22 15:39:00,145 WARN ]: Spent 353.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2018-06-22 15:39:00,864 WARN ]: Spent 235.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 18 [2018-06-22 15:39:01,323 WARN ]: Spent 355.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2018-06-22 15:39:01,466 WARN ]: Spent 113.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2018-06-22 15:39:01,488 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:39:01,488 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 15:39:01,491 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 15:39:01,491 INFO ]: Start accepts. Automaton has 17 states. Word has length 25 [2018-06-22 15:39:01,491 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:39:01,492 INFO ]: With dead ends: 21 [2018-06-22 15:39:01,492 INFO ]: Without dead ends: 21 [2018-06-22 15:39:01,492 INFO ]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2018-06-22 15:39:01,492 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 15:39:01,497 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 15:39:01,497 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 15:39:01,498 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 15:39:01,498 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 15:39:01,498 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:39:01,498 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 15:39:01,498 INFO ]: Interpolant automaton has 17 states. [2018-06-22 15:39:01,498 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 15:39:01,499 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 15:39:01,499 INFO ]: Found error trace [2018-06-22 15:39:01,499 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:39:01,499 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:39:01,500 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 5 times [2018-06-22 15:39:01,500 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:39:01,500 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:39:01,502 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:39:01,502 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:39:01,502 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:39:01,591 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:39:01,885 WARN ]: Spent 101.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2018-06-22 15:39:02,388 WARN ]: Spent 327.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2018-06-22 15:39:02,648 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:39:02,648 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:39:02,648 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 15:39:02,655 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 15:39:02,704 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 15:39:02,704 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:39:02,710 INFO ]: Computing forward predicates... [2018-06-22 15:39:03,378 WARN ]: Spent 158.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 29 [2018-06-22 15:39:04,331 WARN ]: Spent 167.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 22 [2018-06-22 15:39:04,635 WARN ]: Spent 144.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 22 [2018-06-22 15:39:04,817 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:39:04,837 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:39:04,837 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2018-06-22 15:39:04,837 INFO ]: Interpolant automaton has 22 states [2018-06-22 15:39:04,837 INFO ]: Constructing interpolant automaton starting with 22 interpolants. [2018-06-22 15:39:04,838 INFO ]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2018-06-22 15:39:04,838 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 22 states. [2018-06-22 15:39:05,091 WARN ]: Spent 231.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2018-06-22 15:39:05,553 WARN ]: Spent 149.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 27 [2018-06-22 15:39:05,677 WARN ]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 25 [2018-06-22 15:39:05,894 WARN ]: Spent 189.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2018-06-22 15:39:05,925 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:39:05,925 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 15:39:05,929 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 15:39:05,929 INFO ]: Start accepts. Automaton has 22 states. Word has length 29 [2018-06-22 15:39:05,930 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:39:05,930 INFO ]: With dead ends: 23 [2018-06-22 15:39:05,930 INFO ]: Without dead ends: 23 [2018-06-22 15:39:05,931 INFO ]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2018-06-22 15:39:05,931 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 15:39:05,936 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 15:39:05,936 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 15:39:05,937 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 15:39:05,937 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 15:39:05,937 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:39:05,937 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 15:39:05,937 INFO ]: Interpolant automaton has 22 states. [2018-06-22 15:39:05,937 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 15:39:05,941 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 15:39:05,941 INFO ]: Found error trace [2018-06-22 15:39:05,941 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:39:05,941 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:39:05,941 INFO ]: Analyzing trace with hash 800064122, now seen corresponding path program 6 times [2018-06-22 15:39:05,941 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:39:05,941 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:39:05,942 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:39:05,942 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:39:05,942 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:39:06,026 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:39:06,713 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:39:06,714 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:39:06,714 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 15:39:06,719 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 15:39:06,789 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-22 15:39:06,789 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:39:06,794 INFO ]: Computing forward predicates... [2018-06-22 15:39:07,347 WARN ]: Spent 290.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 5 [2018-06-22 15:39:07,709 WARN ]: Spent 102.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2018-06-22 15:39:07,967 WARN ]: Spent 218.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 29 [2018-06-22 15:39:08,198 WARN ]: Spent 118.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 22 [2018-06-22 15:39:08,390 WARN ]: Spent 152.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 22 [2018-06-22 15:39:08,528 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:39:08,559 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:39:08,559 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2018-06-22 15:39:08,559 INFO ]: Interpolant automaton has 23 states [2018-06-22 15:39:08,560 INFO ]: Constructing interpolant automaton starting with 23 interpolants. [2018-06-22 15:39:08,560 INFO ]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2018-06-22 15:39:08,560 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 23 states. [2018-06-22 15:39:08,754 WARN ]: Spent 173.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2018-06-22 15:39:09,071 WARN ]: Spent 191.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 30 [2018-06-22 15:39:09,253 WARN ]: Spent 161.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2018-06-22 15:39:09,447 WARN ]: Spent 166.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 31 [2018-06-22 15:39:09,759 WARN ]: Spent 159.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2018-06-22 15:39:09,786 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:39:09,786 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 15:39:09,787 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 15:39:09,787 INFO ]: Start accepts. Automaton has 23 states. Word has length 33 [2018-06-22 15:39:09,788 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:39:09,788 INFO ]: With dead ends: 25 [2018-06-22 15:39:09,788 INFO ]: Without dead ends: 25 [2018-06-22 15:39:09,789 INFO ]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2018-06-22 15:39:09,789 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 15:39:09,792 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 15:39:09,792 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 15:39:09,793 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 15:39:09,793 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 33 [2018-06-22 15:39:09,793 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:39:09,793 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 15:39:09,793 INFO ]: Interpolant automaton has 23 states. [2018-06-22 15:39:09,793 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 15:39:09,794 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 15:39:09,794 INFO ]: Found error trace [2018-06-22 15:39:09,794 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:39:09,794 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:39:09,794 INFO ]: Analyzing trace with hash -411423458, now seen corresponding path program 7 times [2018-06-22 15:39:09,794 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:39:09,794 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:39:09,795 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:39:09,795 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:39:09,795 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:39:09,864 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:39:10,583 WARN ]: Spent 199.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2018-06-22 15:39:10,889 WARN ]: Spent 259.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2018-06-22 15:39:11,341 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:39:11,342 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:39:11,342 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:39:11,353 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:39:11,404 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:39:11,412 INFO ]: Computing forward predicates... [2018-06-22 15:39:11,808 WARN ]: Spent 103.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2018-06-22 15:39:12,041 WARN ]: Spent 171.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 29 [2018-06-22 15:39:12,208 WARN ]: Spent 119.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 22 [2018-06-22 15:39:12,657 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:39:12,678 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:39:12,678 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2018-06-22 15:39:12,678 INFO ]: Interpolant automaton has 26 states [2018-06-22 15:39:12,678 INFO ]: Constructing interpolant automaton starting with 26 interpolants. [2018-06-22 15:39:12,679 INFO ]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2018-06-22 15:39:12,679 INFO ]: Start difference. First operand 25 states and 26 transitions. Second operand 26 states. [2018-06-22 15:39:13,084 WARN ]: Spent 369.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2018-06-22 15:39:13,401 WARN ]: Spent 176.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 28 [2018-06-22 15:39:13,609 WARN ]: Spent 183.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 31 [2018-06-22 15:39:13,918 WARN ]: Spent 211.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 30 [2018-06-22 15:39:14,050 WARN ]: Spent 108.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 30 [2018-06-22 15:39:14,241 WARN ]: Spent 158.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 31 [2018-06-22 15:39:14,630 WARN ]: Spent 352.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2018-06-22 15:39:14,673 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:39:14,673 INFO ]: Finished difference Result 27 states and 28 transitions. [2018-06-22 15:39:14,673 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 15:39:14,673 INFO ]: Start accepts. Automaton has 26 states. Word has length 37 [2018-06-22 15:39:14,673 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:39:14,674 INFO ]: With dead ends: 27 [2018-06-22 15:39:14,674 INFO ]: Without dead ends: 27 [2018-06-22 15:39:14,675 INFO ]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=227, Invalid=895, Unknown=0, NotChecked=0, Total=1122 [2018-06-22 15:39:14,675 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-22 15:39:14,678 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-06-22 15:39:14,678 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-22 15:39:14,679 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-06-22 15:39:14,679 INFO ]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 37 [2018-06-22 15:39:14,679 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:39:14,679 INFO ]: Abstraction has 27 states and 28 transitions. [2018-06-22 15:39:14,679 INFO ]: Interpolant automaton has 26 states. [2018-06-22 15:39:14,679 INFO ]: Start isEmpty. Operand 27 states and 28 transitions. [2018-06-22 15:39:14,680 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 15:39:14,680 INFO ]: Found error trace [2018-06-22 15:39:14,680 INFO ]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:39:14,680 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:39:14,680 INFO ]: Analyzing trace with hash -544278078, now seen corresponding path program 8 times [2018-06-22 15:39:14,681 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:39:14,681 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:39:14,681 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:39:14,681 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:39:14,681 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:39:14,774 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:39:15,762 WARN ]: Spent 714.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-06-22 15:39:16,020 WARN ]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2018-06-22 15:39:16,610 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 15:39:16,610 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:39:16,610 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:39:16,617 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:39:16,677 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:39:16,677 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:39:16,684 INFO ]: Computing forward predicates... [2018-06-22 15:39:17,114 WARN ]: Spent 363.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2018-06-22 15:39:17,375 WARN ]: Spent 212.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2018-06-22 15:39:17,603 WARN ]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2018-06-22 15:39:18,005 WARN ]: Spent 276.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 25 [2018-06-22 15:39:18,395 WARN ]: Spent 314.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 23 [2018-06-22 15:39:20,764 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 15:39:20,796 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:39:20,796 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 31 [2018-06-22 15:39:20,796 INFO ]: Interpolant automaton has 31 states [2018-06-22 15:39:20,796 INFO ]: Constructing interpolant automaton starting with 31 interpolants. [2018-06-22 15:39:20,797 INFO ]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2018-06-22 15:39:20,797 INFO ]: Start difference. First operand 27 states and 28 transitions. Second operand 31 states. [2018-06-22 15:39:21,664 WARN ]: Spent 442.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2018-06-22 15:39:21,896 WARN ]: Spent 181.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 26 [2018-06-22 15:39:22,215 WARN ]: Spent 287.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 40 [2018-06-22 15:39:22,539 WARN ]: Spent 265.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 40 [2018-06-22 15:39:22,870 WARN ]: Spent 245.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 37 [2018-06-22 15:39:23,142 WARN ]: Spent 232.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 39 [2018-06-22 15:39:23,400 WARN ]: Spent 224.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 40 [2018-06-22 15:39:23,818 WARN ]: Spent 283.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 46 [2018-06-22 15:39:24,199 WARN ]: Spent 345.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 49 [2018-06-22 15:39:24,258 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:39:24,258 INFO ]: Finished difference Result 29 states and 30 transitions. [2018-06-22 15:39:24,258 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 15:39:24,258 INFO ]: Start accepts. Automaton has 31 states. Word has length 41 [2018-06-22 15:39:24,258 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:39:24,259 INFO ]: With dead ends: 29 [2018-06-22 15:39:24,259 INFO ]: Without dead ends: 29 [2018-06-22 15:39:24,259 INFO ]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=269, Invalid=1291, Unknown=0, NotChecked=0, Total=1560 [2018-06-22 15:39:24,259 INFO ]: Start minimizeSevpa. Operand 29 states. [2018-06-22 15:39:24,263 INFO ]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-06-22 15:39:24,263 INFO ]: Start removeUnreachable. Operand 29 states. [2018-06-22 15:39:24,263 INFO ]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-06-22 15:39:24,263 INFO ]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 41 [2018-06-22 15:39:24,263 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:39:24,264 INFO ]: Abstraction has 29 states and 30 transitions. [2018-06-22 15:39:24,264 INFO ]: Interpolant automaton has 31 states. [2018-06-22 15:39:24,264 INFO ]: Start isEmpty. Operand 29 states and 30 transitions. [2018-06-22 15:39:24,264 INFO ]: Finished isEmpty. Found accepting run of length 46 [2018-06-22 15:39:24,264 INFO ]: Found error trace [2018-06-22 15:39:24,265 INFO ]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:39:24,265 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:39:24,265 INFO ]: Analyzing trace with hash 1442343014, now seen corresponding path program 9 times [2018-06-22 15:39:24,265 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:39:24,265 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:39:24,265 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:39:24,265 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:39:24,265 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:39:24,369 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:39:25,268 WARN ]: Spent 602.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-06-22 15:39:25,735 WARN ]: Spent 105.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2018-06-22 15:39:25,962 WARN ]: Spent 106.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2018-06-22 15:39:26,406 INFO ]: Checked inductivity of 171 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 15:39:26,406 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:39:26,406 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:39:26,411 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 15:39:26,484 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-06-22 15:39:26,484 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:39:26,492 INFO ]: Computing forward predicates... [2018-06-22 15:39:26,904 WARN ]: Spent 309.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 32 [2018-06-22 15:39:27,228 WARN ]: Spent 260.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2018-06-22 15:39:27,519 WARN ]: Spent 213.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 29 [2018-06-22 15:39:27,841 WARN ]: Spent 103.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2018-06-22 15:39:28,227 WARN ]: Spent 267.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 25 [2018-06-22 15:39:28,391 WARN ]: Spent 115.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 22 [2018-06-22 15:39:29,055 INFO ]: Checked inductivity of 171 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 15:39:29,075 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:39:29,075 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 34 [2018-06-22 15:39:29,075 INFO ]: Interpolant automaton has 34 states [2018-06-22 15:39:29,075 INFO ]: Constructing interpolant automaton starting with 34 interpolants. [2018-06-22 15:39:29,076 INFO ]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2018-06-22 15:39:29,076 INFO ]: Start difference. First operand 29 states and 30 transitions. Second operand 34 states. [2018-06-22 15:39:29,888 WARN ]: Spent 750.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 70 [2018-06-22 15:39:30,272 WARN ]: Spent 322.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 26 [2018-06-22 15:39:30,753 WARN ]: Spent 425.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 54 [2018-06-22 15:39:31,201 WARN ]: Spent 410.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 49 [2018-06-22 15:39:31,606 WARN ]: Spent 367.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 41 [2018-06-22 15:39:31,997 WARN ]: Spent 354.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 44 [2018-06-22 15:39:32,403 WARN ]: Spent 364.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 42 [2018-06-22 15:39:32,912 WARN ]: Spent 472.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 54 [2018-06-22 15:39:33,331 WARN ]: Spent 377.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 43 [2018-06-22 15:39:34,535 WARN ]: Spent 1.15 s on a formula simplification. DAG size of input: 106 DAG size of output: 84 [2018-06-22 15:39:34,573 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:39:34,573 INFO ]: Finished difference Result 31 states and 32 transitions. [2018-06-22 15:39:34,573 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-06-22 15:39:34,573 INFO ]: Start accepts. Automaton has 34 states. Word has length 45 [2018-06-22 15:39:34,574 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:39:34,574 INFO ]: With dead ends: 31 [2018-06-22 15:39:34,574 INFO ]: Without dead ends: 31 [2018-06-22 15:39:34,575 INFO ]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=333, Invalid=1647, Unknown=0, NotChecked=0, Total=1980 [2018-06-22 15:39:34,575 INFO ]: Start minimizeSevpa. Operand 31 states. [2018-06-22 15:39:34,578 INFO ]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-06-22 15:39:34,579 INFO ]: Start removeUnreachable. Operand 31 states. [2018-06-22 15:39:34,579 INFO ]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-06-22 15:39:34,579 INFO ]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 45 [2018-06-22 15:39:34,580 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:39:34,580 INFO ]: Abstraction has 31 states and 32 transitions. [2018-06-22 15:39:34,580 INFO ]: Interpolant automaton has 34 states. [2018-06-22 15:39:34,580 INFO ]: Start isEmpty. Operand 31 states and 32 transitions. [2018-06-22 15:39:34,581 INFO ]: Finished isEmpty. Found accepting run of length 50 [2018-06-22 15:39:34,581 INFO ]: Found error trace [2018-06-22 15:39:34,581 INFO ]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:39:34,581 INFO ]: === Iteration 11 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:39:34,581 INFO ]: Analyzing trace with hash 352352522, now seen corresponding path program 10 times [2018-06-22 15:39:34,581 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:39:34,581 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:39:34,582 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:39:34,611 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:39:34,611 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:39:34,710 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:39:35,984 INFO ]: Checked inductivity of 210 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-06-22 15:39:36,297 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:39:36,297 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:39:36,303 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 15:39:36,372 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 15:39:36,372 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:39:36,378 INFO ]: Computing forward predicates... [2018-06-22 15:39:36,848 WARN ]: Spent 262.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2018-06-22 15:39:37,000 WARN ]: Spent 111.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2018-06-22 15:39:37,392 WARN ]: Spent 153.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 27 [2018-06-22 15:39:38,087 WARN ]: Spent 599.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 31 [2018-06-22 15:39:38,404 WARN ]: Spent 255.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 23 [2018-06-22 15:39:39,485 INFO ]: Checked inductivity of 210 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-06-22 15:39:39,504 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:39:39,504 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 36 [2018-06-22 15:39:39,507 INFO ]: Interpolant automaton has 36 states [2018-06-22 15:39:39,507 INFO ]: Constructing interpolant automaton starting with 36 interpolants. [2018-06-22 15:39:39,507 INFO ]: CoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2018-06-22 15:39:39,508 INFO ]: Start difference. First operand 31 states and 32 transitions. Second operand 36 states. [2018-06-22 15:39:40,384 WARN ]: Spent 813.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 71 [2018-06-22 15:39:40,706 WARN ]: Spent 268.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 27 [2018-06-22 15:39:41,091 WARN ]: Spent 352.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 38 Received shutdown request... [2018-06-22 15:39:41,487 WARN ]: Removed 5 from assertion stack [2018-06-22 15:39:41,487 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 15:39:41,487 WARN ]: Verification canceled [2018-06-22 15:39:41,490 WARN ]: Timeout [2018-06-22 15:39:41,491 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 03:39:41 BoogieIcfgContainer [2018-06-22 15:39:41,491 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 15:39:41,491 INFO ]: Toolchain (without parser) took 60036.58 ms. Allocated memory was 308.8 MB in the beginning and 785.9 MB in the end (delta: 477.1 MB). Free memory was 261.2 MB in the beginning and 368.4 MB in the end (delta: -107.2 MB). Peak memory consumption was 369.9 MB. Max. memory is 3.6 GB. [2018-06-22 15:39:41,492 INFO ]: SmtParser took 0.49 ms. Allocated memory is still 308.8 MB. Free memory is still 274.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 15:39:41,492 INFO ]: ChcToBoogie took 51.82 ms. Allocated memory is still 308.8 MB. Free memory was 261.2 MB in the beginning and 259.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:39:41,493 INFO ]: Boogie Preprocessor took 43.00 ms. Allocated memory is still 308.8 MB. Free memory was 259.2 MB in the beginning and 257.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 3.6 GB. [2018-06-22 15:39:41,493 INFO ]: RCFGBuilder took 205.17 ms. Allocated memory is still 308.8 MB. Free memory was 257.2 MB in the beginning and 248.1 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:39:41,493 INFO ]: TraceAbstraction took 59726.01 ms. Allocated memory was 308.8 MB in the beginning and 785.9 MB in the end (delta: 477.1 MB). Free memory was 248.1 MB in the beginning and 368.4 MB in the end (delta: -120.2 MB). Peak memory consumption was 356.9 MB. Max. memory is 3.6 GB. [2018-06-22 15:39:41,496 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.49 ms. Allocated memory is still 308.8 MB. Free memory is still 274.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 51.82 ms. Allocated memory is still 308.8 MB. Free memory was 261.2 MB in the beginning and 259.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 43.00 ms. Allocated memory is still 308.8 MB. Free memory was 259.2 MB in the beginning and 257.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 3.6 GB. * RCFGBuilder took 205.17 ms. Allocated memory is still 308.8 MB. Free memory was 257.2 MB in the beginning and 248.1 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 59726.01 ms. Allocated memory was 308.8 MB in the beginning and 785.9 MB in the end (delta: 477.1 MB). Free memory was 248.1 MB in the beginning and 368.4 MB in the end (delta: -120.2 MB). Peak memory consumption was 356.9 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was constructing difference of abstraction (31states) and interpolant automaton (currently 7 states, 36 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 92. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 59.6s OverallTime, 11 OverallIterations, 11 TraceHistogramMax, 18.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 146 SDtfs, 543 SDslu, 1028 SDs, 0 SdLazy, 930 SolverSat, 669 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 511 GetRequests, 227 SyntacticMatches, 25 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 46.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 39.3s InterpolantComputationTime, 629 NumberOfCodeBlocks, 629 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 608 ConstructedInterpolants, 0 QuantifiedInterpolants, 537760 SizeOfPredicates, 869 NumberOfNonLiveVariables, 2790 ConjunctsInSsa, 557 ConjunctsInUnsatCore, 21 InterpolantComputations, 1 PerfectInterpolantSequences, 440/1650 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/substring1.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_15-39-41-507.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/substring1.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_15-39-41-507.csv Completed graceful shutdown