java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/lustre/car_6.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 16:02:21,770 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 16:02:21,772 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 16:02:21,784 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 16:02:21,785 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 16:02:21,785 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 16:02:21,787 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 16:02:21,794 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 16:02:21,798 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 16:02:21,798 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 16:02:21,799 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 16:02:21,799 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 16:02:21,800 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 16:02:21,803 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 16:02:21,804 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 16:02:21,805 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 16:02:21,835 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 16:02:21,837 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 16:02:21,838 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 16:02:21,839 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 16:02:21,840 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 16:02:21,843 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 16:02:21,844 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 16:02:21,844 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 16:02:21,845 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 16:02:21,846 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 16:02:21,848 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 16:02:21,848 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 16:02:21,849 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 16:02:21,849 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 16:02:21,850 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 16:02:21,851 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 16:02:21,855 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 16:02:21,856 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 16:02:21,856 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 16:02:21,857 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 16:02:21,878 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 16:02:21,878 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 16:02:21,879 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 16:02:21,880 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 16:02:21,881 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 16:02:21,881 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 16:02:21,881 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 16:02:21,881 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 16:02:21,882 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 16:02:21,882 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 16:02:21,882 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 16:02:21,882 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 16:02:21,882 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 16:02:21,882 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 16:02:21,883 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 16:02:21,884 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 16:02:21,884 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 16:02:21,884 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 16:02:21,884 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 16:02:21,886 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 16:02:21,886 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 16:02:21,941 INFO ]: Repository-Root is: /tmp [2018-06-22 16:02:21,958 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 16:02:21,973 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 16:02:21,974 INFO ]: Initializing SmtParser... [2018-06-22 16:02:21,974 INFO ]: SmtParser initialized [2018-06-22 16:02:21,975 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/car_6.smt2 [2018-06-22 16:02:21,977 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 16:02:22,064 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/car_6.smt2 unknown [2018-06-22 16:02:22,414 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/car_6.smt2 [2018-06-22 16:02:22,418 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 16:02:22,427 INFO ]: Walking toolchain with 4 elements. [2018-06-22 16:02:22,428 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 16:02:22,428 INFO ]: Initializing ChcToBoogie... [2018-06-22 16:02:22,428 INFO ]: ChcToBoogie initialized [2018-06-22 16:02:22,431 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 04:02:22" (1/1) ... [2018-06-22 16:02:22,485 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:02:22 Unit [2018-06-22 16:02:22,485 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 16:02:22,486 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 16:02:22,486 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 16:02:22,486 INFO ]: Boogie Preprocessor initialized [2018-06-22 16:02:22,509 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:02:22" (1/1) ... [2018-06-22 16:02:22,509 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:02:22" (1/1) ... [2018-06-22 16:02:22,520 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:02:22" (1/1) ... [2018-06-22 16:02:22,521 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:02:22" (1/1) ... [2018-06-22 16:02:22,536 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:02:22" (1/1) ... [2018-06-22 16:02:22,538 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:02:22" (1/1) ... [2018-06-22 16:02:22,539 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:02:22" (1/1) ... [2018-06-22 16:02:22,542 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 16:02:22,542 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 16:02:22,542 INFO ]: Initializing RCFGBuilder... [2018-06-22 16:02:22,542 INFO ]: RCFGBuilder initialized [2018-06-22 16:02:22,543 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:02:22" (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 16:02:22,570 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 16:02:22,570 INFO ]: Found specification of procedure False [2018-06-22 16:02:22,570 INFO ]: Found implementation of procedure False [2018-06-22 16:02:22,570 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 16:02:22,570 INFO ]: Found specification of procedure state [2018-06-22 16:02:22,571 INFO ]: Found implementation of procedure state [2018-06-22 16:02:22,571 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 16:02:22,571 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 16:02:22,571 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 16:02:22,908 INFO ]: Using library mode [2018-06-22 16:02:22,909 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 04:02:22 BoogieIcfgContainer [2018-06-22 16:02:22,909 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 16:02:22,910 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 16:02:22,910 INFO ]: Initializing TraceAbstraction... [2018-06-22 16:02:22,923 INFO ]: TraceAbstraction initialized [2018-06-22 16:02:22,923 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 04:02:22" (1/3) ... [2018-06-22 16:02:22,924 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@758086c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 04:02:22, skipping insertion in model container [2018-06-22 16:02:22,924 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:02:22" (2/3) ... [2018-06-22 16:02:22,924 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@758086c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 04:02:22, skipping insertion in model container [2018-06-22 16:02:22,924 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 04:02:22" (3/3) ... [2018-06-22 16:02:22,926 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 16:02:22,936 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 16:02:22,946 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 16:02:22,984 INFO ]: Using default assertion order modulation [2018-06-22 16:02:22,985 INFO ]: Interprodecural is true [2018-06-22 16:02:22,985 INFO ]: Hoare is false [2018-06-22 16:02:22,985 INFO ]: Compute interpolants for FPandBP [2018-06-22 16:02:22,985 INFO ]: Backedges is TWOTRACK [2018-06-22 16:02:22,985 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 16:02:22,985 INFO ]: Difference is false [2018-06-22 16:02:22,985 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 16:02:22,985 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 16:02:22,998 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 16:02:23,010 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 16:02:23,010 INFO ]: Found error trace [2018-06-22 16:02:23,011 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 16:02:23,012 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 16:02:23,017 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 16:02:23,019 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 16:02:23,020 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 16:02:23,061 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 16:02:23,061 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 16:02:23,061 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 16:02:23,135 INFO ]: Conjunction of SSA is unsat [2018-06-22 16:02:23,293 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 16:02:23,296 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 16:02:23,296 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 16:02:23,297 INFO ]: Interpolant automaton has 4 states [2018-06-22 16:02:23,307 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 16:02:23,308 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 16:02:23,310 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 16:02:23,451 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 16:02:23,451 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 16:02:23,453 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 16:02:23,454 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 16:02:23,455 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 16:02:23,466 INFO ]: With dead ends: 13 [2018-06-22 16:02:23,466 INFO ]: Without dead ends: 13 [2018-06-22 16:02:23,468 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 16:02:23,482 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 16:02:23,503 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 16:02:23,504 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 16:02:23,505 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 16:02:23,505 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 16:02:23,505 INFO ]: Finished accepts. word is rejected. [2018-06-22 16:02:23,505 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 16:02:23,506 INFO ]: Interpolant automaton has 4 states. [2018-06-22 16:02:23,506 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 16:02:23,507 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 16:02:23,507 INFO ]: Found error trace [2018-06-22 16:02:23,507 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 16:02:23,507 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 16:02:23,507 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 16:02:23,507 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 16:02:23,507 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 16:02:23,508 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 16:02:23,508 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 16:02:23,508 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 16:02:23,575 INFO ]: Conjunction of SSA is unsat [2018-06-22 16:02:23,723 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 16:02:23,724 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 16:02:23,724 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 16:02:23,740 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 16:02:23,846 INFO ]: Conjunction of SSA is unsat [2018-06-22 16:02:23,857 INFO ]: Computing forward predicates... [2018-06-22 16:02:24,247 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 16:02:24,282 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 16:02:24,282 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 16:02:24,283 INFO ]: Interpolant automaton has 9 states [2018-06-22 16:02:24,283 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 16:02:24,284 INFO ]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-06-22 16:02:24,284 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 16:02:24,479 WARN ]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 16:02:24,748 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 16:02:24,748 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 16:02:24,748 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 16:02:24,748 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 16:02:24,749 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 16:02:24,749 INFO ]: With dead ends: 15 [2018-06-22 16:02:24,749 INFO ]: Without dead ends: 15 [2018-06-22 16:02:24,750 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-06-22 16:02:24,750 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 16:02:24,753 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 16:02:24,753 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 16:02:24,753 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 16:02:24,753 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 16:02:24,754 INFO ]: Finished accepts. word is rejected. [2018-06-22 16:02:24,754 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 16:02:24,754 INFO ]: Interpolant automaton has 9 states. [2018-06-22 16:02:24,754 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 16:02:24,754 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 16:02:24,754 INFO ]: Found error trace [2018-06-22 16:02:24,754 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 16:02:24,754 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 16:02:24,756 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 16:02:24,756 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 16:02:24,756 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 16:02:24,757 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 16:02:24,757 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 16:02:24,757 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 16:02:24,860 INFO ]: Conjunction of SSA is unsat [2018-06-22 16:02:25,276 WARN ]: Spent 275.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2018-06-22 16:02:25,381 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 16:02:25,381 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 16:02:25,381 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 16:02:25,389 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 16:02:25,483 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 16:02:25,483 INFO ]: Conjunction of SSA is unsat [2018-06-22 16:02:25,487 INFO ]: Computing forward predicates... [2018-06-22 16:02:25,897 WARN ]: Spent 108.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 18 [2018-06-22 16:02:26,506 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 16:02:26,527 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 16:02:26,527 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 16:02:26,527 INFO ]: Interpolant automaton has 13 states [2018-06-22 16:02:26,527 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 16:02:26,528 INFO ]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2018-06-22 16:02:26,528 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 16:02:26,970 WARN ]: Spent 131.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2018-06-22 16:02:27,163 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 16:02:27,163 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 16:02:27,164 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 16:02:27,164 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 16:02:27,164 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 16:02:27,164 INFO ]: With dead ends: 19 [2018-06-22 16:02:27,164 INFO ]: Without dead ends: 19 [2018-06-22 16:02:27,165 INFO ]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2018-06-22 16:02:27,165 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 16:02:27,168 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 16:02:27,209 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 16:02:27,210 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 16:02:27,210 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2018-06-22 16:02:27,210 INFO ]: Finished accepts. word is rejected. [2018-06-22 16:02:27,210 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 16:02:27,210 INFO ]: Interpolant automaton has 13 states. [2018-06-22 16:02:27,210 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 16:02:27,211 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 16:02:27,211 INFO ]: Found error trace [2018-06-22 16:02:27,211 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 16:02:27,211 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 16:02:27,211 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 3 times [2018-06-22 16:02:27,211 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 16:02:27,211 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 16:02:27,212 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 16:02:27,212 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 16:02:27,212 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 16:02:27,340 INFO ]: Conjunction of SSA is unsat [2018-06-22 16:02:27,868 WARN ]: Spent 128.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2018-06-22 16:02:28,067 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 16:02:28,067 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 16:02:28,067 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-22 16:02:28,081 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 16:02:28,226 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-06-22 16:02:28,227 INFO ]: Conjunction of SSA is unsat [2018-06-22 16:02:28,234 INFO ]: Computing forward predicates... [2018-06-22 16:02:28,667 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 16:02:28,688 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 16:02:28,688 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2018-06-22 16:02:28,688 INFO ]: Interpolant automaton has 21 states [2018-06-22 16:02:28,689 INFO ]: Constructing interpolant automaton starting with 21 interpolants. [2018-06-22 16:02:28,689 INFO ]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2018-06-22 16:02:28,689 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 21 states. [2018-06-22 16:02:29,092 WARN ]: Spent 323.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 118 [2018-06-22 16:02:29,463 WARN ]: Spent 330.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 82 [2018-06-22 16:02:29,901 WARN ]: Spent 386.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 101 [2018-06-22 16:02:30,150 WARN ]: Spent 218.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 97 [2018-06-22 16:02:30,453 WARN ]: Spent 255.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 101 [2018-06-22 16:02:30,737 WARN ]: Spent 242.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 111 [2018-06-22 16:02:30,774 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 16:02:30,774 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 16:02:30,776 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 16:02:30,776 INFO ]: Start accepts. Automaton has 21 states. Word has length 25 [2018-06-22 16:02:30,777 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 16:02:30,777 INFO ]: With dead ends: 23 [2018-06-22 16:02:30,777 INFO ]: Without dead ends: 23 [2018-06-22 16:02:30,778 INFO ]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2018-06-22 16:02:30,778 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 16:02:30,780 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 16:02:30,780 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 16:02:30,781 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 16:02:30,781 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 25 [2018-06-22 16:02:30,781 INFO ]: Finished accepts. word is rejected. [2018-06-22 16:02:30,781 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 16:02:30,781 INFO ]: Interpolant automaton has 21 states. [2018-06-22 16:02:30,781 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 16:02:30,782 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 16:02:30,782 INFO ]: Found error trace [2018-06-22 16:02:30,782 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 16:02:30,782 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 16:02:30,782 INFO ]: Analyzing trace with hash -1661294575, now seen corresponding path program 4 times [2018-06-22 16:02:30,783 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 16:02:30,783 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 16:02:30,783 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 16:02:30,783 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 16:02:30,783 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 16:02:30,909 INFO ]: Conjunction of SSA is unsat [2018-06-22 16:02:31,579 WARN ]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-22 16:02:32,023 WARN ]: Spent 368.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2018-06-22 16:02:32,148 WARN ]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 23 [2018-06-22 16:02:32,717 WARN ]: Spent 530.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 51 [2018-06-22 16:02:33,072 WARN ]: Spent 328.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2018-06-22 16:02:33,452 WARN ]: Spent 348.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2018-06-22 16:02:33,608 WARN ]: Spent 123.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2018-06-22 16:02:34,060 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 16:02:34,060 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 16:02:34,060 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 16:02:34,067 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 16:02:34,199 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 16:02:34,202 INFO ]: Conjunction of SSA is unsat [2018-06-22 16:02:34,212 INFO ]: Computing forward predicates... [2018-06-22 16:02:35,083 INFO ]: Checked inductivity of 78 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 16:02:35,104 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 16:02:35,104 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2018-06-22 16:02:35,105 INFO ]: Interpolant automaton has 29 states [2018-06-22 16:02:35,105 INFO ]: Constructing interpolant automaton starting with 29 interpolants. [2018-06-22 16:02:35,105 INFO ]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2018-06-22 16:02:35,105 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 29 states. [2018-06-22 16:02:36,268 WARN ]: Spent 1.02 s on a formula simplification. DAG size of input: 161 DAG size of output: 145 [2018-06-22 16:02:36,699 WARN ]: Spent 381.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 116 [2018-06-22 16:02:37,346 WARN ]: Spent 606.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 155 [2018-06-22 16:02:37,880 WARN ]: Spent 478.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 142 [2018-06-22 16:02:38,611 WARN ]: Spent 628.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 138 [2018-06-22 16:02:39,229 WARN ]: Spent 453.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 139 [2018-06-22 16:02:39,685 WARN ]: Spent 396.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 132 [2018-06-22 16:02:40,279 WARN ]: Spent 435.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 140 [2018-06-22 16:02:40,340 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 16:02:40,340 INFO ]: Finished difference Result 27 states and 28 transitions. [2018-06-22 16:02:40,340 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 16:02:40,340 INFO ]: Start accepts. Automaton has 29 states. Word has length 33 [2018-06-22 16:02:40,341 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 16:02:40,341 INFO ]: With dead ends: 27 [2018-06-22 16:02:40,341 INFO ]: Without dead ends: 27 [2018-06-22 16:02:40,342 INFO ]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=277, Invalid=1129, Unknown=0, NotChecked=0, Total=1406 [2018-06-22 16:02:40,342 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-22 16:02:40,345 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-06-22 16:02:40,345 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-22 16:02:40,346 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-06-22 16:02:40,346 INFO ]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 33 [2018-06-22 16:02:40,346 INFO ]: Finished accepts. word is rejected. [2018-06-22 16:02:40,346 INFO ]: Abstraction has 27 states and 28 transitions. [2018-06-22 16:02:40,346 INFO ]: Interpolant automaton has 29 states. [2018-06-22 16:02:40,346 INFO ]: Start isEmpty. Operand 27 states and 28 transitions. [2018-06-22 16:02:40,347 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 16:02:40,347 INFO ]: Found error trace [2018-06-22 16:02:40,347 INFO ]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 16:02:40,348 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 16:02:40,348 INFO ]: Analyzing trace with hash 1618126293, now seen corresponding path program 5 times [2018-06-22 16:02:40,348 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 16:02:40,348 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 16:02:40,348 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 16:02:40,348 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 16:02:40,348 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 16:02:40,567 INFO ]: Conjunction of SSA is unsat [2018-06-22 16:02:41,270 WARN ]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 16:02:42,281 WARN ]: Spent 912.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 25 [2018-06-22 16:02:42,450 WARN ]: Spent 122.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 24 [2018-06-22 16:02:42,760 WARN ]: Spent 167.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 35 [2018-06-22 16:02:42,929 WARN ]: Spent 124.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 35 [2018-06-22 16:02:43,472 WARN ]: Spent 118.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 17 [2018-06-22 16:02:43,665 WARN ]: Spent 148.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 15 [2018-06-22 16:02:44,342 WARN ]: Spent 568.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 18 [2018-06-22 16:02:44,389 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 16:02:44,389 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 16:02:44,389 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) [2018-06-22 16:02:44,403 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 16:02:44,574 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-06-22 16:02:44,574 INFO ]: Conjunction of SSA is unsat [2018-06-22 16:02:44,583 INFO ]: Computing forward predicates... [2018-06-22 16:02:45,045 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 16:02:46,020 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 16:02:46,041 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 16:02:46,041 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 37 [2018-06-22 16:02:46,042 INFO ]: Interpolant automaton has 37 states [2018-06-22 16:02:46,042 INFO ]: Constructing interpolant automaton starting with 37 interpolants. [2018-06-22 16:02:46,042 INFO ]: CoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2018-06-22 16:02:46,043 INFO ]: Start difference. First operand 27 states and 28 transitions. Second operand 37 states. [2018-06-22 16:02:46,399 WARN ]: Spent 256.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 78 [2018-06-22 16:02:46,838 WARN ]: Spent 393.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 55 [2018-06-22 16:02:47,424 WARN ]: Spent 554.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 56 [2018-06-22 16:02:47,886 WARN ]: Spent 404.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2018-06-22 16:02:48,255 WARN ]: Spent 241.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 62 [2018-06-22 16:02:48,630 WARN ]: Spent 290.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 62 [2018-06-22 16:02:48,964 WARN ]: Spent 266.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 62 [2018-06-22 16:02:49,209 WARN ]: Spent 196.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 55 [2018-06-22 16:02:49,533 WARN ]: Spent 249.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 73 [2018-06-22 16:02:49,576 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 16:02:49,613 INFO ]: Finished difference Result 29 states and 30 transitions. [2018-06-22 16:02:49,614 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 16:02:49,614 INFO ]: Start accepts. Automaton has 37 states. Word has length 41 [2018-06-22 16:02:49,614 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 16:02:49,615 INFO ]: With dead ends: 29 [2018-06-22 16:02:49,615 INFO ]: Without dead ends: 29 [2018-06-22 16:02:49,616 INFO ]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=398, Invalid=1764, Unknown=0, NotChecked=0, Total=2162 [2018-06-22 16:02:49,616 INFO ]: Start minimizeSevpa. Operand 29 states. [2018-06-22 16:02:49,621 INFO ]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-06-22 16:02:49,623 INFO ]: Start removeUnreachable. Operand 29 states. [2018-06-22 16:02:49,624 INFO ]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-06-22 16:02:49,624 INFO ]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 41 [2018-06-22 16:02:49,624 INFO ]: Finished accepts. word is rejected. [2018-06-22 16:02:49,624 INFO ]: Abstraction has 29 states and 30 transitions. [2018-06-22 16:02:49,624 INFO ]: Interpolant automaton has 37 states. [2018-06-22 16:02:49,624 INFO ]: Start isEmpty. Operand 29 states and 30 transitions. [2018-06-22 16:02:49,625 INFO ]: Finished isEmpty. Found accepting run of length 46 [2018-06-22 16:02:49,625 INFO ]: Found error trace [2018-06-22 16:02:49,625 INFO ]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 16:02:49,626 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 16:02:49,626 INFO ]: Analyzing trace with hash 996918775, now seen corresponding path program 6 times [2018-06-22 16:02:49,626 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 16:02:49,626 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 16:02:49,626 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 16:02:49,626 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 16:02:49,626 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 16:02:49,836 INFO ]: Conjunction of SSA is unsat [2018-06-22 16:02:50,666 WARN ]: Spent 207.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 22 [2018-06-22 16:02:50,801 WARN ]: Spent 119.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 34 [2018-06-22 16:02:51,069 WARN ]: Spent 242.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 36 [2018-06-22 16:02:51,657 WARN ]: Spent 408.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 32 [2018-06-22 16:02:51,907 WARN ]: Spent 197.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 40 [2018-06-22 16:02:52,280 WARN ]: Spent 302.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 67 [2018-06-22 16:02:52,428 WARN ]: Spent 105.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 37 [2018-06-22 16:02:52,602 WARN ]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 32 [2018-06-22 16:02:52,910 WARN ]: Spent 245.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 39 [2018-06-22 16:02:53,226 WARN ]: Spent 201.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 33 [2018-06-22 16:02:53,459 WARN ]: Spent 170.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 10 [2018-06-22 16:02:53,695 WARN ]: Spent 169.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 10 [2018-06-22 16:02:54,195 WARN ]: Spent 406.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 19 [2018-06-22 16:02:54,355 WARN ]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 16 [2018-06-22 16:02:54,431 INFO ]: Checked inductivity of 171 backedges. 1 proven. 125 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 16:02:54,431 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 16:02:54,431 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 16:02:54,437 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 16:02:54,715 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-06-22 16:02:54,715 INFO ]: Conjunction of SSA is unsat [2018-06-22 16:02:54,724 INFO ]: Computing forward predicates... [2018-06-22 16:02:56,047 WARN ]: Spent 102.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 5 [2018-06-22 16:02:56,816 INFO ]: Checked inductivity of 171 backedges. 2 proven. 124 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 16:02:56,844 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 16:02:56,844 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 41 [2018-06-22 16:02:56,845 INFO ]: Interpolant automaton has 41 states [2018-06-22 16:02:56,845 INFO ]: Constructing interpolant automaton starting with 41 interpolants. [2018-06-22 16:02:56,845 INFO ]: CoverageRelationStatistics Valid=125, Invalid=1515, Unknown=0, NotChecked=0, Total=1640 [2018-06-22 16:02:56,845 INFO ]: Start difference. First operand 29 states and 30 transitions. Second operand 41 states. [2018-06-22 16:02:57,451 WARN ]: Spent 415.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 157 [2018-06-22 16:02:57,995 WARN ]: Spent 488.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 155 [2018-06-22 16:02:58,804 WARN ]: Spent 762.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 151 [2018-06-22 16:02:59,527 WARN ]: Spent 541.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 147 [2018-06-22 16:02:59,971 WARN ]: Spent 386.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 139 [2018-06-22 16:03:00,430 WARN ]: Spent 390.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 142 [2018-06-22 16:03:00,896 WARN ]: Spent 398.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 147 [2018-06-22 16:03:01,440 WARN ]: Spent 437.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 141 [2018-06-22 16:03:01,924 WARN ]: Spent 409.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 144 [2018-06-22 16:03:02,408 WARN ]: Spent 382.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 144 [2018-06-22 16:03:02,864 WARN ]: Spent 375.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 142 [2018-06-22 16:03:03,536 WARN ]: Spent 582.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 147 [2018-06-22 16:03:03,591 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 16:03:03,591 INFO ]: Finished difference Result 35 states and 36 transitions. [2018-06-22 16:03:03,591 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-06-22 16:03:03,591 INFO ]: Start accepts. Automaton has 41 states. Word has length 45 [2018-06-22 16:03:03,591 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 16:03:03,592 INFO ]: With dead ends: 35 [2018-06-22 16:03:03,592 INFO ]: Without dead ends: 35 [2018-06-22 16:03:03,593 INFO ]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=546, Invalid=2316, Unknown=0, NotChecked=0, Total=2862 [2018-06-22 16:03:03,593 INFO ]: Start minimizeSevpa. Operand 35 states. [2018-06-22 16:03:03,600 INFO ]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-06-22 16:03:03,610 INFO ]: Start removeUnreachable. Operand 35 states. [2018-06-22 16:03:03,611 INFO ]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-06-22 16:03:03,611 INFO ]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 45 [2018-06-22 16:03:03,611 INFO ]: Finished accepts. word is rejected. [2018-06-22 16:03:03,611 INFO ]: Abstraction has 35 states and 36 transitions. [2018-06-22 16:03:03,611 INFO ]: Interpolant automaton has 41 states. [2018-06-22 16:03:03,611 INFO ]: Start isEmpty. Operand 35 states and 36 transitions. [2018-06-22 16:03:03,613 INFO ]: Finished isEmpty. Found accepting run of length 58 [2018-06-22 16:03:03,613 INFO ]: Found error trace [2018-06-22 16:03:03,613 INFO ]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 16:03:03,613 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 16:03:03,613 INFO ]: Analyzing trace with hash -2085541027, now seen corresponding path program 7 times [2018-06-22 16:03:03,613 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 16:03:03,613 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 16:03:03,614 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 16:03:03,614 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 16:03:03,614 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 16:03:04,450 INFO ]: Conjunction of SSA is unsat [2018-06-22 16:03:08,384 WARN ]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-22 16:03:08,692 WARN ]: Spent 218.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 42 [2018-06-22 16:03:13,627 WARN ]: Spent 141.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 46 [2018-06-22 16:03:15,802 WARN ]: Spent 2.05 s on a formula simplification. DAG size of input: 592 DAG size of output: 62 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown