java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/conc/szymanski_safe.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:47:52,822 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:47:52,825 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:47:52,839 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:47:52,840 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:47:52,840 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:47:52,841 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:47:52,845 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:47:52,847 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:47:52,849 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:47:52,849 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:47:52,849 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:47:52,850 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:47:52,853 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:47:52,854 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:47:52,855 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:47:52,864 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:47:52,867 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:47:52,869 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:47:52,869 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:47:52,870 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:47:52,875 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:47:52,875 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:47:52,876 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:47:52,876 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:47:52,880 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:47:52,881 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:47:52,881 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:47:52,882 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:47:52,882 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:47:52,887 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:47:52,888 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:47:52,888 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:47:52,888 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:47:52,889 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:47:52,889 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 14:47:52,910 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:47:52,911 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:47:52,911 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:47:52,911 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:47:52,912 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:47:52,912 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:47:52,912 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:47:52,914 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:47:52,914 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:47:52,914 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:47:52,914 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:47:52,914 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:47:52,915 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:47:52,915 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:47:52,915 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:47:52,915 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:47:52,916 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:47:52,916 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:47:52,916 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:47:52,917 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:47:52,918 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:47:52,968 INFO ]: Repository-Root is: /tmp [2018-06-22 14:47:52,987 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:47:52,994 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:47:52,995 INFO ]: Initializing SmtParser... [2018-06-22 14:47:52,996 INFO ]: SmtParser initialized [2018-06-22 14:47:52,997 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/conc/szymanski_safe.smt2 [2018-06-22 14:47:52,999 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-22 14:47:53,094 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/conc/szymanski_safe.smt2 unknown [2018-06-22 14:47:53,364 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/conc/szymanski_safe.smt2 [2018-06-22 14:47:53,369 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:47:53,374 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:47:53,375 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:47:53,375 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:47:53,375 INFO ]: ChcToBoogie initialized [2018-06-22 14:47:53,379 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:47:53" (1/1) ... [2018-06-22 14:47:53,437 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:47:53 Unit [2018-06-22 14:47:53,438 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:47:53,438 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:47:53,438 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:47:53,438 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:47:53,467 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:47:53" (1/1) ... [2018-06-22 14:47:53,467 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:47:53" (1/1) ... [2018-06-22 14:47:53,478 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:47:53" (1/1) ... [2018-06-22 14:47:53,488 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:47:53" (1/1) ... [2018-06-22 14:47:53,492 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:47:53" (1/1) ... [2018-06-22 14:47:53,493 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:47:53" (1/1) ... [2018-06-22 14:47:53,495 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:47:53" (1/1) ... [2018-06-22 14:47:53,506 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:47:53,506 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:47:53,506 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:47:53,506 INFO ]: RCFGBuilder initialized [2018-06-22 14:47:53,507 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:47:53" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-22 14:47:53,517 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:47:53,517 INFO ]: Found specification of procedure False [2018-06-22 14:47:53,517 INFO ]: Found implementation of procedure False [2018-06-22 14:47:53,517 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:47:53,517 INFO ]: Found specification of procedure state [2018-06-22 14:47:53,517 INFO ]: Found implementation of procedure state [2018-06-22 14:47:53,517 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:47:53,517 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:47:53,517 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:47:53,721 INFO ]: Using library mode [2018-06-22 14:47:53,722 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:47:53 BoogieIcfgContainer [2018-06-22 14:47:53,722 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:47:53,730 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:47:53,730 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:47:53,733 INFO ]: TraceAbstraction initialized [2018-06-22 14:47:53,734 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:47:53" (1/3) ... [2018-06-22 14:47:53,735 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@615690dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:47:53, skipping insertion in model container [2018-06-22 14:47:53,735 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:47:53" (2/3) ... [2018-06-22 14:47:53,735 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@615690dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:47:53, skipping insertion in model container [2018-06-22 14:47:53,735 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:47:53" (3/3) ... [2018-06-22 14:47:53,737 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:47:53,748 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:47:53,758 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:47:53,808 INFO ]: Using default assertion order modulation [2018-06-22 14:47:53,808 INFO ]: Interprodecural is true [2018-06-22 14:47:53,808 INFO ]: Hoare is false [2018-06-22 14:47:53,809 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:47:53,809 INFO ]: Backedges is TWOTRACK [2018-06-22 14:47:53,812 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:47:53,812 INFO ]: Difference is false [2018-06-22 14:47:53,812 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:47:53,812 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:47:53,829 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:47:53,844 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:47:53,844 INFO ]: Found error trace [2018-06-22 14:47:53,845 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:47:53,845 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:47:53,851 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 14:47:53,854 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:47:53,854 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:47:53,903 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:47:53,903 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:47:53,903 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:47:53,934 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:47:54,083 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:47:54,086 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:47:54,086 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:47:54,088 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:47:54,110 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:47:54,111 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:47:54,113 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:47:54,208 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:47:54,208 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:47:54,209 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:47:54,210 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:47:54,210 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:47:54,220 INFO ]: With dead ends: 13 [2018-06-22 14:47:54,220 INFO ]: Without dead ends: 13 [2018-06-22 14:47:54,222 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:47:54,234 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:47:54,256 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:47:54,259 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:47:54,260 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:47:54,261 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:47:54,261 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:47:54,261 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:47:54,261 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:47:54,261 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:47:54,263 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:47:54,263 INFO ]: Found error trace [2018-06-22 14:47:54,263 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:47:54,264 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:47:54,264 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 14:47:54,264 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:47:54,264 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:47:54,265 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:47:54,265 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:47:54,265 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:47:54,327 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:47:54,700 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:47:54,700 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:47:54,700 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:47:54,711 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:47:54,761 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:47:54,771 INFO ]: Computing forward predicates... [2018-06-22 14:47:55,533 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:47:55,569 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:47:55,569 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 14:47:55,569 INFO ]: Interpolant automaton has 9 states [2018-06-22 14:47:55,569 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 14:47:55,570 INFO ]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-06-22 14:47:55,570 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 14:47:56,184 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:47:56,185 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 14:47:56,185 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 14:47:56,185 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 14:47:56,186 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:47:56,186 INFO ]: With dead ends: 15 [2018-06-22 14:47:56,186 INFO ]: Without dead ends: 15 [2018-06-22 14:47:56,187 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2018-06-22 14:47:56,187 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 14:47:56,190 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 14:47:56,190 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 14:47:56,192 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 14:47:56,192 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 14:47:56,192 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:47:56,192 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 14:47:56,192 INFO ]: Interpolant automaton has 9 states. [2018-06-22 14:47:56,192 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 14:47:56,193 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 14:47:56,193 INFO ]: Found error trace [2018-06-22 14:47:56,193 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:47:56,193 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:47:56,193 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 14:47:56,193 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:47:56,193 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:47:56,194 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:47:56,194 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:47:56,194 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:47:56,242 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:47:56,697 WARN ]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-06-22 14:47:56,936 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:47:56,936 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:47:56,936 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:47:56,944 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 14:47:57,000 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:47:57,000 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:47:57,005 INFO ]: Computing forward predicates... [2018-06-22 14:48:04,443 WARN ]: Spent 4.48 s on a formula simplification. DAG size of input: 462 DAG size of output: 38 [2018-06-22 14:48:04,569 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:48:04,589 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:48:04,589 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-06-22 14:48:04,590 INFO ]: Interpolant automaton has 14 states [2018-06-22 14:48:04,590 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-22 14:48:04,591 INFO ]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2018-06-22 14:48:04,591 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 14 states. [2018-06-22 14:48:04,773 WARN ]: Spent 157.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2018-06-22 14:48:05,118 WARN ]: Spent 261.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2018-06-22 14:48:05,136 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:48:05,136 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 14:48:05,136 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:48:05,136 INFO ]: Start accepts. Automaton has 14 states. Word has length 17 [2018-06-22 14:48:05,137 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:48:05,137 INFO ]: With dead ends: 17 [2018-06-22 14:48:05,137 INFO ]: Without dead ends: 17 [2018-06-22 14:48:05,138 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2018-06-22 14:48:05,138 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 14:48:05,141 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 14:48:05,141 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 14:48:05,142 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 14:48:05,142 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 14:48:05,142 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:48:05,142 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 14:48:05,142 INFO ]: Interpolant automaton has 14 states. [2018-06-22 14:48:05,142 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 14:48:05,143 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 14:48:05,143 INFO ]: Found error trace [2018-06-22 14:48:05,143 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:48:05,143 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:48:05,143 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 14:48:05,143 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:48:05,143 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:48:05,144 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:48:05,144 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:48:05,144 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:48:05,183 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:48:05,675 WARN ]: Spent 139.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2018-06-22 14:48:05,794 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:48:05,795 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:48:05,795 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 14:48:05,810 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 14:48:05,899 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 14:48:05,899 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:48:05,904 INFO ]: Computing forward predicates... [2018-06-22 14:48:30,419 WARN ]: Spent 386.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 29 [2018-06-22 14:48:31,586 WARN ]: expecting exponential blowup for input size 6 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown