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_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/cav12/pc_sfifo_3.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 04:28:55,815 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 04:28:55,817 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 04:28:55,831 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 04:28:55,831 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 04:28:55,832 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 04:28:55,834 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 04:28:55,836 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 04:28:55,838 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 04:28:55,839 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 04:28:55,841 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 04:28:55,841 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 04:28:55,842 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 04:28:55,843 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 04:28:55,843 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 04:28:55,846 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 04:28:55,848 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 04:28:55,858 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 04:28:55,859 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 04:28:55,860 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 04:28:55,866 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 04:28:55,868 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 04:28:55,869 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 04:28:55,869 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 04:28:55,870 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 04:28:55,870 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 04:28:55,871 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 04:28:55,872 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 04:28:55,873 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 04:28:55,873 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 04:28:55,873 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 04:28:55,874 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 04:28:55,875 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 04:28:55,875 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 04:28:55,876 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 04:28:55,876 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 04:28:55,894 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 04:28:55,895 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 04:28:55,895 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 04:28:55,895 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 04:28:55,896 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 04:28:55,897 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 04:28:55,897 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 04:28:55,897 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 04:28:55,897 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 04:28:55,897 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 04:28:55,898 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 04:28:55,898 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 04:28:55,898 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 04:28:55,898 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 04:28:55,898 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 04:28:55,898 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 04:28:55,899 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 04:28:55,900 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 04:28:55,900 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 04:28:55,951 INFO ]: Repository-Root is: /tmp [2018-06-22 04:28:55,968 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 04:28:55,974 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 04:28:55,975 INFO ]: Initializing SmtParser... [2018-06-22 04:28:55,975 INFO ]: SmtParser initialized [2018-06-22 04:28:55,976 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/pc_sfifo_3.smt2 [2018-06-22 04:28:55,977 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 04:28:56,071 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/pc_sfifo_3.smt2 unknown [2018-06-22 04:28:56,659 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/pc_sfifo_3.smt2 [2018-06-22 04:28:56,664 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 04:28:56,679 INFO ]: Walking toolchain with 4 elements. [2018-06-22 04:28:56,679 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 04:28:56,679 INFO ]: Initializing ChcToBoogie... [2018-06-22 04:28:56,679 INFO ]: ChcToBoogie initialized [2018-06-22 04:28:56,684 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 04:28:56" (1/1) ... [2018-06-22 04:28:56,787 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:28:56 Unit [2018-06-22 04:28:56,787 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 04:28:56,788 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 04:28:56,788 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 04:28:56,788 INFO ]: Boogie Preprocessor initialized [2018-06-22 04:28:56,809 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:28:56" (1/1) ... [2018-06-22 04:28:56,809 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:28:56" (1/1) ... [2018-06-22 04:28:56,837 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:28:56" (1/1) ... [2018-06-22 04:28:56,837 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:28:56" (1/1) ... [2018-06-22 04:28:56,859 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:28:56" (1/1) ... [2018-06-22 04:28:56,861 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:28:56" (1/1) ... [2018-06-22 04:28:56,873 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:28:56" (1/1) ... [2018-06-22 04:28:56,877 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 04:28:56,878 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 04:28:56,878 INFO ]: Initializing RCFGBuilder... [2018-06-22 04:28:56,878 INFO ]: RCFGBuilder initialized [2018-06-22 04:28:56,879 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:28:56" (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 04:28:56,899 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 04:28:56,899 INFO ]: Found specification of procedure gotoProc [2018-06-22 04:28:56,899 INFO ]: Found implementation of procedure gotoProc [2018-06-22 04:28:56,899 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 04:28:56,899 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 04:28:56,899 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 04:28:57,342 INFO ]: Using library mode [2018-06-22 04:28:57,343 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 04:28:57 BoogieIcfgContainer [2018-06-22 04:28:57,343 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 04:28:57,345 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 04:28:57,345 INFO ]: Initializing TraceAbstraction... [2018-06-22 04:28:57,348 INFO ]: TraceAbstraction initialized [2018-06-22 04:28:57,348 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 04:28:56" (1/3) ... [2018-06-22 04:28:57,349 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63debe08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 04:28:57, skipping insertion in model container [2018-06-22 04:28:57,349 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:28:56" (2/3) ... [2018-06-22 04:28:57,349 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63debe08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 04:28:57, skipping insertion in model container [2018-06-22 04:28:57,349 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 04:28:57" (3/3) ... [2018-06-22 04:28:57,351 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 04:28:57,361 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 04:28:57,370 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 04:28:57,452 INFO ]: Using default assertion order modulation [2018-06-22 04:28:57,452 INFO ]: Interprodecural is true [2018-06-22 04:28:57,452 INFO ]: Hoare is false [2018-06-22 04:28:57,452 INFO ]: Compute interpolants for FPandBP [2018-06-22 04:28:57,453 INFO ]: Backedges is TWOTRACK [2018-06-22 04:28:57,453 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 04:28:57,453 INFO ]: Difference is false [2018-06-22 04:28:57,453 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 04:28:57,453 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 04:28:57,469 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 04:28:57,486 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 04:28:57,486 INFO ]: Found error trace [2018-06-22 04:28:57,487 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:28:57,487 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:28:57,494 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-22 04:28:57,496 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:28:57,497 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:28:57,537 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:28:57,537 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:28:57,537 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:28:57,623 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:28:57,774 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:28:57,776 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 04:28:57,776 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 04:28:57,778 INFO ]: Interpolant automaton has 3 states [2018-06-22 04:28:57,791 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 04:28:57,792 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 04:28:57,794 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 04:28:57,896 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:28:57,896 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 04:28:57,896 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 04:28:57,897 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 04:28:57,898 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:28:57,906 INFO ]: With dead ends: 9 [2018-06-22 04:28:57,906 INFO ]: Without dead ends: 9 [2018-06-22 04:28:57,911 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 04:28:57,929 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 04:28:57,956 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 04:28:57,957 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 04:28:57,957 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 04:28:57,958 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 04:28:57,958 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:28:57,958 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 04:28:57,958 INFO ]: Interpolant automaton has 3 states. [2018-06-22 04:28:57,958 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 04:28:57,959 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 04:28:57,959 INFO ]: Found error trace [2018-06-22 04:28:57,959 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:28:57,959 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:28:57,959 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-22 04:28:57,959 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:28:57,959 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:28:57,960 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:28:57,960 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:28:57,960 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:28:58,097 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:28:58,354 WARN ]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 04:28:58,373 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:28:58,373 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:28:58,373 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 04:28:58,380 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:28:58,534 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:28:58,547 INFO ]: Computing forward predicates... [2018-06-22 04:28:59,039 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:28:59,061 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 04:28:59,062 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-22 04:28:59,062 INFO ]: Interpolant automaton has 6 states [2018-06-22 04:28:59,062 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 04:28:59,062 INFO ]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-22 04:28:59,063 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-06-22 04:28:59,320 WARN ]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2018-06-22 04:28:59,357 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:28:59,357 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 04:28:59,357 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 04:28:59,357 INFO ]: Start accepts. Automaton has 6 states. Word has length 8 [2018-06-22 04:28:59,358 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:28:59,358 INFO ]: With dead ends: 10 [2018-06-22 04:28:59,358 INFO ]: Without dead ends: 10 [2018-06-22 04:28:59,359 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-06-22 04:28:59,359 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 04:28:59,360 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 04:28:59,360 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 04:28:59,360 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 04:28:59,360 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 04:28:59,360 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:28:59,360 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 04:28:59,361 INFO ]: Interpolant automaton has 6 states. [2018-06-22 04:28:59,361 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 04:28:59,364 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 04:28:59,364 INFO ]: Found error trace [2018-06-22 04:28:59,364 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:28:59,364 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:28:59,365 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-22 04:28:59,365 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:28:59,365 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:28:59,366 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:28:59,366 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:28:59,366 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:28:59,475 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:28:59,827 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:28:59,827 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:28:59,827 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-22 04:28:59,844 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 04:29:00,023 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 04:29:00,023 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:29:00,035 INFO ]: Computing forward predicates... [2018-06-22 04:29:00,773 WARN ]: Spent 158.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 11 [2018-06-22 04:29:00,793 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:29:00,826 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 04:29:00,826 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-06-22 04:29:00,826 INFO ]: Interpolant automaton has 8 states [2018-06-22 04:29:00,826 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 04:29:00,827 INFO ]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-06-22 04:29:00,827 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 8 states. [2018-06-22 04:29:01,150 WARN ]: Spent 177.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 11 [2018-06-22 04:29:01,284 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:29:01,284 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 04:29:01,285 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 04:29:01,285 INFO ]: Start accepts. Automaton has 8 states. Word has length 9 [2018-06-22 04:29:01,285 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:29:01,285 INFO ]: With dead ends: 13 [2018-06-22 04:29:01,285 INFO ]: Without dead ends: 13 [2018-06-22 04:29:01,285 INFO ]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2018-06-22 04:29:01,285 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 04:29:01,287 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 04:29:01,287 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 04:29:01,287 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 04:29:01,287 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 9 [2018-06-22 04:29:01,287 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:29:01,287 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 04:29:01,287 INFO ]: Interpolant automaton has 8 states. [2018-06-22 04:29:01,287 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 04:29:01,288 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 04:29:01,288 INFO ]: Found error trace [2018-06-22 04:29:01,288 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:29:01,288 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:29:01,288 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 3 times [2018-06-22 04:29:01,288 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:29:01,288 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:29:01,289 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:29:01,289 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 04:29:01,289 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:29:01,456 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:29:01,905 WARN ]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 04:29:02,850 WARN ]: Spent 896.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 9 [2018-06-22 04:29:03,089 WARN ]: Spent 165.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-06-22 04:29:03,303 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:29:03,303 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:29:03,303 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 04:29:03,309 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 04:29:03,547 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 04:29:03,547 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:29:03,563 INFO ]: Computing forward predicates... [2018-06-22 04:29:06,610 WARN ]: Spent 140.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2018-06-22 04:29:11,441 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:29:11,464 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 04:29:11,464 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-06-22 04:29:11,464 INFO ]: Interpolant automaton has 14 states [2018-06-22 04:29:11,464 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-22 04:29:11,465 INFO ]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2018-06-22 04:29:11,465 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 14 states. [2018-06-22 04:29:11,691 WARN ]: Spent 109.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2018-06-22 04:29:12,210 WARN ]: Spent 381.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2018-06-22 04:29:12,261 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:29:12,261 INFO ]: Finished difference Result 17 states and 17 transitions. [2018-06-22 04:29:12,261 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 04:29:12,261 INFO ]: Start accepts. Automaton has 14 states. Word has length 12 [2018-06-22 04:29:12,261 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:29:12,261 INFO ]: With dead ends: 17 [2018-06-22 04:29:12,261 INFO ]: Without dead ends: 17 [2018-06-22 04:29:12,262 INFO ]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=150, Invalid=230, Unknown=0, NotChecked=0, Total=380 [2018-06-22 04:29:12,262 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 04:29:12,263 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 04:29:12,263 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 04:29:12,264 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-06-22 04:29:12,264 INFO ]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 12 [2018-06-22 04:29:12,264 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:29:12,264 INFO ]: Abstraction has 17 states and 17 transitions. [2018-06-22 04:29:12,264 INFO ]: Interpolant automaton has 14 states. [2018-06-22 04:29:12,264 INFO ]: Start isEmpty. Operand 17 states and 17 transitions. [2018-06-22 04:29:12,264 INFO ]: Finished isEmpty. Found accepting run of length 17 [2018-06-22 04:29:12,264 INFO ]: Found error trace [2018-06-22 04:29:12,264 INFO ]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:29:12,264 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:29:12,265 INFO ]: Analyzing trace with hash -1752374252, now seen corresponding path program 4 times [2018-06-22 04:29:12,265 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:29:12,265 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:29:12,265 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:29:12,265 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 04:29:12,265 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:29:12,611 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:29:13,327 WARN ]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 04:29:13,576 WARN ]: Spent 135.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2018-06-22 04:29:13,716 WARN ]: Spent 118.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2018-06-22 04:29:13,935 INFO ]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:29:13,935 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:29:13,935 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 04:29:13,951 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown