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/eldarica-misc/LIA/reve/010b-horn.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 11:13:16,833 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 11:13:16,836 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 11:13:16,847 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 11:13:16,848 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 11:13:16,849 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 11:13:16,850 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 11:13:16,853 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 11:13:16,855 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 11:13:16,857 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 11:13:16,858 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 11:13:16,858 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 11:13:16,859 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 11:13:16,861 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 11:13:16,861 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 11:13:16,865 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 11:13:16,867 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 11:13:16,876 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 11:13:16,878 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 11:13:16,880 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 11:13:16,881 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 11:13:16,883 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 11:13:16,883 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 11:13:16,884 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 11:13:16,885 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 11:13:16,885 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 11:13:16,886 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 11:13:16,887 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 11:13:16,888 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 11:13:16,888 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 11:13:16,889 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 11:13:16,890 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 11:13:16,890 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 11:13:16,891 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 11:13:16,891 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 11:13:16,892 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 11:13:16,912 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 11:13:16,914 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 11:13:16,914 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 11:13:16,915 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 11:13:16,916 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 11:13:16,916 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 11:13:16,916 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 11:13:16,916 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 11:13:16,916 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 11:13:16,917 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 11:13:16,917 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 11:13:16,917 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 11:13:16,917 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 11:13:16,917 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 11:13:16,918 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 11:13:16,922 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 11:13:16,922 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 11:13:16,922 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 11:13:16,922 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 11:13:16,924 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 11:13:16,924 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 11:13:16,957 INFO ]: Repository-Root is: /tmp [2018-06-22 11:13:16,972 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 11:13:16,980 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 11:13:16,981 INFO ]: Initializing SmtParser... [2018-06-22 11:13:16,981 INFO ]: SmtParser initialized [2018-06-22 11:13:16,982 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/eldarica-misc/LIA/reve/010b-horn.smt2 [2018-06-22 11:13:16,984 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 11:13:17,080 INFO ]: Executing SMT file /storage/chc-comp/eldarica-misc/LIA/reve/010b-horn.smt2 unknown [2018-06-22 11:13:17,281 INFO ]: Succesfully executed SMT file /storage/chc-comp/eldarica-misc/LIA/reve/010b-horn.smt2 [2018-06-22 11:13:17,285 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 11:13:17,292 INFO ]: Walking toolchain with 4 elements. [2018-06-22 11:13:17,292 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 11:13:17,292 INFO ]: Initializing ChcToBoogie... [2018-06-22 11:13:17,292 INFO ]: ChcToBoogie initialized [2018-06-22 11:13:17,296 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 11:13:17" (1/1) ... [2018-06-22 11:13:17,346 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:13:17 Unit [2018-06-22 11:13:17,346 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 11:13:17,347 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 11:13:17,347 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 11:13:17,347 INFO ]: Boogie Preprocessor initialized [2018-06-22 11:13:17,370 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:13:17" (1/1) ... [2018-06-22 11:13:17,370 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:13:17" (1/1) ... [2018-06-22 11:13:17,379 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:13:17" (1/1) ... [2018-06-22 11:13:17,379 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:13:17" (1/1) ... [2018-06-22 11:13:17,382 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:13:17" (1/1) ... [2018-06-22 11:13:17,384 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:13:17" (1/1) ... [2018-06-22 11:13:17,385 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:13:17" (1/1) ... [2018-06-22 11:13:17,387 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 11:13:17,388 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 11:13:17,388 INFO ]: Initializing RCFGBuilder... [2018-06-22 11:13:17,388 INFO ]: RCFGBuilder initialized [2018-06-22 11:13:17,389 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:13:17" (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 11:13:17,405 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 11:13:17,405 INFO ]: Found specification of procedure False [2018-06-22 11:13:17,405 INFO ]: Found implementation of procedure False [2018-06-22 11:13:17,405 INFO ]: Specification and implementation of procedure INV1 given in one single declaration [2018-06-22 11:13:17,405 INFO ]: Found specification of procedure INV1 [2018-06-22 11:13:17,405 INFO ]: Found implementation of procedure INV1 [2018-06-22 11:13:17,405 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 11:13:17,405 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 11:13:17,405 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 11:13:17,674 INFO ]: Using library mode [2018-06-22 11:13:17,674 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 11:13:17 BoogieIcfgContainer [2018-06-22 11:13:17,674 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 11:13:17,675 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 11:13:17,675 INFO ]: Initializing TraceAbstraction... [2018-06-22 11:13:17,678 INFO ]: TraceAbstraction initialized [2018-06-22 11:13:17,679 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 11:13:17" (1/3) ... [2018-06-22 11:13:17,684 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aedd574 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 11:13:17, skipping insertion in model container [2018-06-22 11:13:17,685 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:13:17" (2/3) ... [2018-06-22 11:13:17,685 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aedd574 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 11:13:17, skipping insertion in model container [2018-06-22 11:13:17,685 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 11:13:17" (3/3) ... [2018-06-22 11:13:17,687 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 11:13:17,697 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 11:13:17,704 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 11:13:17,739 INFO ]: Using default assertion order modulation [2018-06-22 11:13:17,740 INFO ]: Interprodecural is true [2018-06-22 11:13:17,740 INFO ]: Hoare is false [2018-06-22 11:13:17,740 INFO ]: Compute interpolants for FPandBP [2018-06-22 11:13:17,740 INFO ]: Backedges is TWOTRACK [2018-06-22 11:13:17,740 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 11:13:17,740 INFO ]: Difference is false [2018-06-22 11:13:17,740 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 11:13:17,740 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 11:13:17,755 INFO ]: Start isEmpty. Operand 15 states. [2018-06-22 11:13:17,768 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 11:13:17,768 INFO ]: Found error trace [2018-06-22 11:13:17,770 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:13:17,770 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:13:17,776 INFO ]: Analyzing trace with hash -1409059775, now seen corresponding path program 1 times [2018-06-22 11:13:17,778 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:13:17,778 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:13:17,813 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:13:17,813 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:13:17,813 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:13:17,864 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:13:18,077 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 11:13:18,078 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 11:13:18,078 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 11:13:18,080 INFO ]: Interpolant automaton has 4 states [2018-06-22 11:13:18,090 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 11:13:18,090 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 11:13:18,092 INFO ]: Start difference. First operand 15 states. Second operand 4 states. [2018-06-22 11:13:18,221 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:13:18,221 INFO ]: Finished difference Result 15 states and 22 transitions. [2018-06-22 11:13:18,222 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 11:13:18,223 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 11:13:18,223 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:13:18,232 INFO ]: With dead ends: 15 [2018-06-22 11:13:18,232 INFO ]: Without dead ends: 15 [2018-06-22 11:13:18,234 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 11:13:18,246 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 11:13:18,268 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 11:13:18,269 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 11:13:18,270 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 22 transitions. [2018-06-22 11:13:18,271 INFO ]: Start accepts. Automaton has 15 states and 22 transitions. Word has length 9 [2018-06-22 11:13:18,273 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:13:18,273 INFO ]: Abstraction has 15 states and 22 transitions. [2018-06-22 11:13:18,273 INFO ]: Interpolant automaton has 4 states. [2018-06-22 11:13:18,273 INFO ]: Start isEmpty. Operand 15 states and 22 transitions. [2018-06-22 11:13:18,275 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 11:13:18,275 INFO ]: Found error trace [2018-06-22 11:13:18,275 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:13:18,275 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:13:18,275 INFO ]: Analyzing trace with hash 1397489035, now seen corresponding path program 1 times [2018-06-22 11:13:18,275 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:13:18,275 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:13:18,277 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:13:18,277 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:13:18,277 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:13:18,298 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:13:18,466 INFO ]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 11:13:18,466 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 11:13:18,467 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 11:13:18,468 INFO ]: Interpolant automaton has 4 states [2018-06-22 11:13:18,468 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 11:13:18,468 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 11:13:18,468 INFO ]: Start difference. First operand 15 states and 22 transitions. Second operand 4 states. [2018-06-22 11:13:18,796 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:13:18,796 INFO ]: Finished difference Result 17 states and 26 transitions. [2018-06-22 11:13:18,797 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 11:13:18,797 INFO ]: Start accepts. Automaton has 4 states. Word has length 13 [2018-06-22 11:13:18,797 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:13:18,798 INFO ]: With dead ends: 17 [2018-06-22 11:13:18,798 INFO ]: Without dead ends: 17 [2018-06-22 11:13:18,799 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 11:13:18,799 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 11:13:18,805 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 15. [2018-06-22 11:13:18,805 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 11:13:18,805 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 21 transitions. [2018-06-22 11:13:18,805 INFO ]: Start accepts. Automaton has 15 states and 21 transitions. Word has length 13 [2018-06-22 11:13:18,806 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:13:18,806 INFO ]: Abstraction has 15 states and 21 transitions. [2018-06-22 11:13:18,808 INFO ]: Interpolant automaton has 4 states. [2018-06-22 11:13:18,808 INFO ]: Start isEmpty. Operand 15 states and 21 transitions. [2018-06-22 11:13:18,809 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 11:13:18,809 INFO ]: Found error trace [2018-06-22 11:13:18,809 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:13:18,810 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:13:18,810 INFO ]: Analyzing trace with hash 1152238182, now seen corresponding path program 1 times [2018-06-22 11:13:18,810 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:13:18,810 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:13:18,811 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:13:18,811 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:13:18,811 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:13:18,839 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:13:18,993 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 11:13:18,993 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:13:18,993 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 11:13:19,003 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:13:19,048 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:13:19,058 INFO ]: Computing forward predicates... [2018-06-22 11:13:19,127 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 11:13:19,150 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:13:19,150 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-22 11:13:19,150 INFO ]: Interpolant automaton has 7 states [2018-06-22 11:13:19,150 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 11:13:19,150 INFO ]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-06-22 11:13:19,151 INFO ]: Start difference. First operand 15 states and 21 transitions. Second operand 7 states. [2018-06-22 11:13:19,453 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:13:19,453 INFO ]: Finished difference Result 21 states and 34 transitions. [2018-06-22 11:13:19,453 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 11:13:19,453 INFO ]: Start accepts. Automaton has 7 states. Word has length 13 [2018-06-22 11:13:19,453 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:13:19,454 INFO ]: With dead ends: 21 [2018-06-22 11:13:19,454 INFO ]: Without dead ends: 21 [2018-06-22 11:13:19,455 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-06-22 11:13:19,455 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 11:13:19,461 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 17. [2018-06-22 11:13:19,461 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 11:13:19,462 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 25 transitions. [2018-06-22 11:13:19,462 INFO ]: Start accepts. Automaton has 17 states and 25 transitions. Word has length 13 [2018-06-22 11:13:19,462 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:13:19,462 INFO ]: Abstraction has 17 states and 25 transitions. [2018-06-22 11:13:19,462 INFO ]: Interpolant automaton has 7 states. [2018-06-22 11:13:19,462 INFO ]: Start isEmpty. Operand 17 states and 25 transitions. [2018-06-22 11:13:19,463 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 11:13:19,463 INFO ]: Found error trace [2018-06-22 11:13:19,463 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:13:19,463 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:13:19,463 INFO ]: Analyzing trace with hash 1300014339, now seen corresponding path program 1 times [2018-06-22 11:13:19,463 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:13:19,463 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:13:19,464 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:13:19,464 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:13:19,464 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:13:19,484 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:13:19,669 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 11:13:19,669 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:13:19,669 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 11:13:19,684 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:13:19,704 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:13:19,706 INFO ]: Computing forward predicates... [2018-06-22 11:13:19,773 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 11:13:19,794 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:13:19,794 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 11:13:19,794 INFO ]: Interpolant automaton has 9 states [2018-06-22 11:13:19,794 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 11:13:19,794 INFO ]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-06-22 11:13:19,795 INFO ]: Start difference. First operand 17 states and 25 transitions. Second operand 9 states. [2018-06-22 11:13:20,246 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:13:20,247 INFO ]: Finished difference Result 21 states and 34 transitions. [2018-06-22 11:13:20,248 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 11:13:20,248 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 11:13:20,248 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:13:20,249 INFO ]: With dead ends: 21 [2018-06-22 11:13:20,249 INFO ]: Without dead ends: 21 [2018-06-22 11:13:20,249 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-06-22 11:13:20,249 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 11:13:20,254 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 19. [2018-06-22 11:13:20,254 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 11:13:20,255 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 29 transitions. [2018-06-22 11:13:20,255 INFO ]: Start accepts. Automaton has 19 states and 29 transitions. Word has length 13 [2018-06-22 11:13:20,255 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:13:20,255 INFO ]: Abstraction has 19 states and 29 transitions. [2018-06-22 11:13:20,255 INFO ]: Interpolant automaton has 9 states. [2018-06-22 11:13:20,255 INFO ]: Start isEmpty. Operand 19 states and 29 transitions. [2018-06-22 11:13:20,256 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 11:13:20,256 INFO ]: Found error trace [2018-06-22 11:13:20,256 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:13:20,256 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:13:20,256 INFO ]: Analyzing trace with hash 937427787, now seen corresponding path program 2 times [2018-06-22 11:13:20,256 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:13:20,256 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:13:20,257 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:13:20,257 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:13:20,257 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:13:20,278 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:13:20,356 INFO ]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-06-22 11:13:20,356 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:13:20,356 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 11:13:20,365 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 11:13:20,409 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 11:13:20,409 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:13:20,412 INFO ]: Computing forward predicates... [2018-06-22 11:13:20,520 INFO ]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-06-22 11:13:20,543 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:13:20,543 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-06-22 11:13:20,543 INFO ]: Interpolant automaton has 9 states [2018-06-22 11:13:20,543 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 11:13:20,543 INFO ]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-06-22 11:13:20,543 INFO ]: Start difference. First operand 19 states and 29 transitions. Second operand 9 states. [2018-06-22 11:13:20,663 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:13:20,663 INFO ]: Finished difference Result 27 states and 46 transitions. [2018-06-22 11:13:20,663 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 11:13:20,663 INFO ]: Start accepts. Automaton has 9 states. Word has length 17 [2018-06-22 11:13:20,663 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:13:20,664 INFO ]: With dead ends: 27 [2018-06-22 11:13:20,664 INFO ]: Without dead ends: 27 [2018-06-22 11:13:20,664 INFO ]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-06-22 11:13:20,664 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-22 11:13:20,670 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 21. [2018-06-22 11:13:20,670 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 11:13:20,671 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 33 transitions. [2018-06-22 11:13:20,671 INFO ]: Start accepts. Automaton has 21 states and 33 transitions. Word has length 17 [2018-06-22 11:13:20,671 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:13:20,671 INFO ]: Abstraction has 21 states and 33 transitions. [2018-06-22 11:13:20,671 INFO ]: Interpolant automaton has 9 states. [2018-06-22 11:13:20,671 INFO ]: Start isEmpty. Operand 21 states and 33 transitions. [2018-06-22 11:13:20,672 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 11:13:20,672 INFO ]: Found error trace [2018-06-22 11:13:20,672 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:13:20,673 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:13:20,673 INFO ]: Analyzing trace with hash -1108795800, now seen corresponding path program 1 times [2018-06-22 11:13:20,673 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:13:20,673 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:13:20,673 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:13:20,674 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:13:20,674 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:13:20,688 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:13:20,886 INFO ]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-06-22 11:13:20,887 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:13:20,887 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 11:13:20,893 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:13:20,923 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:13:20,926 INFO ]: Computing forward predicates... [2018-06-22 11:13:21,100 INFO ]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 11:13:21,130 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:13:21,130 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2018-06-22 11:13:21,131 INFO ]: Interpolant automaton has 10 states [2018-06-22 11:13:21,131 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 11:13:21,131 INFO ]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-06-22 11:13:21,131 INFO ]: Start difference. First operand 21 states and 33 transitions. Second operand 10 states. [2018-06-22 11:13:21,353 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:13:21,353 INFO ]: Finished difference Result 31 states and 55 transitions. [2018-06-22 11:13:21,356 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 11:13:21,356 INFO ]: Start accepts. Automaton has 10 states. Word has length 17 [2018-06-22 11:13:21,356 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:13:21,357 INFO ]: With dead ends: 31 [2018-06-22 11:13:21,357 INFO ]: Without dead ends: 31 [2018-06-22 11:13:21,357 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2018-06-22 11:13:21,358 INFO ]: Start minimizeSevpa. Operand 31 states. [2018-06-22 11:13:21,363 INFO ]: Finished minimizeSevpa. Reduced states from 31 to 21. [2018-06-22 11:13:21,363 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 11:13:21,364 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 33 transitions. [2018-06-22 11:13:21,364 INFO ]: Start accepts. Automaton has 21 states and 33 transitions. Word has length 17 [2018-06-22 11:13:21,364 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:13:21,364 INFO ]: Abstraction has 21 states and 33 transitions. [2018-06-22 11:13:21,364 INFO ]: Interpolant automaton has 10 states. [2018-06-22 11:13:21,365 INFO ]: Start isEmpty. Operand 21 states and 33 transitions. [2018-06-22 11:13:21,365 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 11:13:21,365 INFO ]: Found error trace [2018-06-22 11:13:21,366 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:13:21,366 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:13:21,366 INFO ]: Analyzing trace with hash -829829691, now seen corresponding path program 2 times [2018-06-22 11:13:21,366 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:13:21,366 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:13:21,366 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:13:21,367 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:13:21,367 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:13:21,375 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:13:21,420 INFO ]: Checked inductivity of 10 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 11:13:21,420 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:13:21,420 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:13:21,437 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 11:13:21,452 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 11:13:21,453 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:13:21,454 INFO ]: Computing forward predicates... [2018-06-22 11:13:21,474 INFO ]: Checked inductivity of 10 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 11:13:21,493 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:13:21,493 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-22 11:13:21,493 INFO ]: Interpolant automaton has 7 states [2018-06-22 11:13:21,493 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 11:13:21,493 INFO ]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-06-22 11:13:21,493 INFO ]: Start difference. First operand 21 states and 33 transitions. Second operand 7 states. [2018-06-22 11:13:21,627 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:13:21,627 INFO ]: Finished difference Result 38 states and 66 transitions. [2018-06-22 11:13:21,628 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 11:13:21,628 INFO ]: Start accepts. Automaton has 7 states. Word has length 17 [2018-06-22 11:13:21,628 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:13:21,629 INFO ]: With dead ends: 38 [2018-06-22 11:13:21,629 INFO ]: Without dead ends: 36 [2018-06-22 11:13:21,629 INFO ]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-06-22 11:13:21,630 INFO ]: Start minimizeSevpa. Operand 36 states. [2018-06-22 11:13:21,637 INFO ]: Finished minimizeSevpa. Reduced states from 36 to 32. [2018-06-22 11:13:21,637 INFO ]: Start removeUnreachable. Operand 32 states. [2018-06-22 11:13:21,638 INFO ]: Finished removeUnreachable. Reduced from 32 states to 32 states and 56 transitions. [2018-06-22 11:13:21,638 INFO ]: Start accepts. Automaton has 32 states and 56 transitions. Word has length 17 [2018-06-22 11:13:21,639 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:13:21,639 INFO ]: Abstraction has 32 states and 56 transitions. [2018-06-22 11:13:21,639 INFO ]: Interpolant automaton has 7 states. [2018-06-22 11:13:21,639 INFO ]: Start isEmpty. Operand 32 states and 56 transitions. [2018-06-22 11:13:21,640 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 11:13:21,640 INFO ]: Found error trace [2018-06-22 11:13:21,640 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:13:21,640 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:13:21,640 INFO ]: Analyzing trace with hash 1216393896, now seen corresponding path program 2 times [2018-06-22 11:13:21,640 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:13:21,640 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:13:21,641 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:13:21,641 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:13:21,641 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:13:21,647 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:13:21,671 INFO ]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 11:13:21,671 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 11:13:21,671 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 11:13:21,672 INFO ]: Interpolant automaton has 4 states [2018-06-22 11:13:21,672 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 11:13:21,672 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 11:13:21,672 INFO ]: Start difference. First operand 32 states and 56 transitions. Second operand 4 states. [2018-06-22 11:13:21,710 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:13:21,711 INFO ]: Finished difference Result 47 states and 73 transitions. [2018-06-22 11:13:21,711 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 11:13:21,711 INFO ]: Start accepts. Automaton has 4 states. Word has length 17 [2018-06-22 11:13:21,711 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:13:21,712 INFO ]: With dead ends: 47 [2018-06-22 11:13:21,712 INFO ]: Without dead ends: 35 [2018-06-22 11:13:21,712 INFO ]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-22 11:13:21,712 INFO ]: Start minimizeSevpa. Operand 35 states. [2018-06-22 11:13:21,718 INFO ]: Finished minimizeSevpa. Reduced states from 35 to 31. [2018-06-22 11:13:21,719 INFO ]: Start removeUnreachable. Operand 31 states. [2018-06-22 11:13:21,720 INFO ]: Finished removeUnreachable. Reduced from 31 states to 31 states and 48 transitions. [2018-06-22 11:13:21,720 INFO ]: Start accepts. Automaton has 31 states and 48 transitions. Word has length 17 [2018-06-22 11:13:21,720 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:13:21,720 INFO ]: Abstraction has 31 states and 48 transitions. [2018-06-22 11:13:21,720 INFO ]: Interpolant automaton has 4 states. [2018-06-22 11:13:21,720 INFO ]: Start isEmpty. Operand 31 states and 48 transitions. [2018-06-22 11:13:21,721 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 11:13:21,721 INFO ]: Found error trace [2018-06-22 11:13:21,721 INFO ]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:13:21,721 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:13:21,721 INFO ]: Analyzing trace with hash 476185429, now seen corresponding path program 1 times [2018-06-22 11:13:21,721 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:13:21,721 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:13:21,722 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:13:21,722 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:13:21,722 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:13:21,729 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:13:21,749 INFO ]: Checked inductivity of 19 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-06-22 11:13:21,749 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:13:21,749 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 11:13:21,755 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:13:21,775 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:13:21,777 INFO ]: Computing forward predicates... [2018-06-22 11:13:21,797 INFO ]: Checked inductivity of 19 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-06-22 11:13:21,816 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:13:21,816 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-06-22 11:13:21,816 INFO ]: Interpolant automaton has 4 states [2018-06-22 11:13:21,817 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 11:13:21,817 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 11:13:21,817 INFO ]: Start difference. First operand 31 states and 48 transitions. Second operand 4 states. [2018-06-22 11:13:21,865 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:13:21,865 INFO ]: Finished difference Result 29 states and 38 transitions. [2018-06-22 11:13:21,866 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 11:13:21,866 INFO ]: Start accepts. Automaton has 4 states. Word has length 21 [2018-06-22 11:13:21,866 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:13:21,867 INFO ]: With dead ends: 29 [2018-06-22 11:13:21,867 INFO ]: Without dead ends: 22 [2018-06-22 11:13:21,867 INFO ]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-22 11:13:21,867 INFO ]: Start minimizeSevpa. Operand 22 states. [2018-06-22 11:13:21,870 INFO ]: Finished minimizeSevpa. Reduced states from 22 to 20. [2018-06-22 11:13:21,870 INFO ]: Start removeUnreachable. Operand 20 states. [2018-06-22 11:13:21,871 INFO ]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2018-06-22 11:13:21,871 INFO ]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 21 [2018-06-22 11:13:21,871 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:13:21,871 INFO ]: Abstraction has 20 states and 24 transitions. [2018-06-22 11:13:21,871 INFO ]: Interpolant automaton has 4 states. [2018-06-22 11:13:21,871 INFO ]: Start isEmpty. Operand 20 states and 24 transitions. [2018-06-22 11:13:21,872 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 11:13:21,872 INFO ]: Found error trace [2018-06-22 11:13:21,872 INFO ]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:13:21,872 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:13:21,872 INFO ]: Analyzing trace with hash 576086634, now seen corresponding path program 3 times [2018-06-22 11:13:21,872 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:13:21,872 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:13:21,873 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:13:21,873 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:13:21,873 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:13:21,884 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:13:22,208 INFO ]: Checked inductivity of 19 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-06-22 11:13:22,209 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:13:22,209 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:13:22,218 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 11:13:22,259 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 11:13:22,259 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:13:22,262 INFO ]: Computing forward predicates... [2018-06-22 11:13:22,299 INFO ]: Checked inductivity of 19 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-06-22 11:13:22,317 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:13:22,317 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-06-22 11:13:22,318 INFO ]: Interpolant automaton has 9 states [2018-06-22 11:13:22,318 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 11:13:22,318 INFO ]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-06-22 11:13:22,318 INFO ]: Start difference. First operand 20 states and 24 transitions. Second operand 9 states. [2018-06-22 11:13:22,373 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:13:22,373 INFO ]: Finished difference Result 16 states and 20 transitions. [2018-06-22 11:13:22,373 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 11:13:22,373 INFO ]: Start accepts. Automaton has 9 states. Word has length 21 [2018-06-22 11:13:22,373 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:13:22,373 INFO ]: With dead ends: 16 [2018-06-22 11:13:22,373 INFO ]: Without dead ends: 0 [2018-06-22 11:13:22,373 INFO ]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2018-06-22 11:13:22,373 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 11:13:22,373 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 11:13:22,373 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 11:13:22,373 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 11:13:22,373 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2018-06-22 11:13:22,374 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:13:22,374 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 11:13:22,374 INFO ]: Interpolant automaton has 9 states. [2018-06-22 11:13:22,374 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 11:13:22,374 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 11:13:22,379 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 11:13:22 BoogieIcfgContainer [2018-06-22 11:13:22,379 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 11:13:22,380 INFO ]: Toolchain (without parser) took 5093.79 ms. Allocated memory was 308.8 MB in the beginning and 338.2 MB in the end (delta: 29.4 MB). Free memory was 265.3 MB in the beginning and 223.7 MB in the end (delta: 41.7 MB). Peak memory consumption was 71.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:13:22,381 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 308.8 MB. Free memory is still 274.4 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 11:13:22,382 INFO ]: ChcToBoogie took 54.16 ms. Allocated memory is still 308.8 MB. Free memory was 264.3 MB in the beginning and 262.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:13:22,382 INFO ]: Boogie Preprocessor took 39.89 ms. Allocated memory is still 308.8 MB. Free memory was 262.3 MB in the beginning and 261.3 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-22 11:13:22,383 INFO ]: RCFGBuilder took 286.51 ms. Allocated memory is still 308.8 MB. Free memory was 261.3 MB in the beginning and 253.4 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:13:22,383 INFO ]: TraceAbstraction took 4703.45 ms. Allocated memory was 308.8 MB in the beginning and 338.2 MB in the end (delta: 29.4 MB). Free memory was 253.4 MB in the beginning and 223.7 MB in the end (delta: 29.7 MB). Peak memory consumption was 59.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:13:22,386 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 308.8 MB. Free memory is still 274.4 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 54.16 ms. Allocated memory is still 308.8 MB. Free memory was 264.3 MB in the beginning and 262.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 39.89 ms. Allocated memory is still 308.8 MB. Free memory was 262.3 MB in the beginning and 261.3 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 286.51 ms. Allocated memory is still 308.8 MB. Free memory was 261.3 MB in the beginning and 253.4 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 4703.45 ms. Allocated memory was 308.8 MB in the beginning and 338.2 MB in the end (delta: 29.4 MB). Free memory was 253.4 MB in the beginning and 223.7 MB in the end (delta: 29.7 MB). Peak memory consumption was 59.0 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 15 locations, 1 error locations. SAFE Result, 4.6s OverallTime, 10 OverallIterations, 4 TraceHistogramMax, 1.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 175 SDtfs, 45 SDslu, 316 SDs, 0 SdLazy, 510 SolverSat, 61 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 188 GetRequests, 119 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 34 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 277 NumberOfCodeBlocks, 275 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 260 ConstructedInterpolants, 0 QuantifiedInterpolants, 12064 SizeOfPredicates, 28 NumberOfNonLiveVariables, 901 ConjunctsInSsa, 91 ConjunctsInUnsatCore, 17 InterpolantComputations, 3 PerfectInterpolantSequences, 112/158 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/010b-horn.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_11-13-22-397.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/010b-horn.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_11-13-22-397.csv Received shutdown request...