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/kundu.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 04:24:34,489 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 04:24:34,492 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 04:24:34,503 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 04:24:34,504 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 04:24:34,505 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 04:24:34,506 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 04:24:34,508 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 04:24:34,510 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 04:24:34,511 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 04:24:34,515 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 04:24:34,516 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 04:24:34,517 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 04:24:34,518 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 04:24:34,519 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 04:24:34,520 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 04:24:34,524 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 04:24:34,528 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 04:24:34,534 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 04:24:34,541 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 04:24:34,543 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 04:24:34,545 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 04:24:34,545 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 04:24:34,546 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 04:24:34,550 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 04:24:34,553 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 04:24:34,555 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 04:24:34,558 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 04:24:34,559 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 04:24:34,559 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 04:24:34,560 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 04:24:34,566 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 04:24:34,567 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 04:24:34,568 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 04:24:34,568 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 04:24:34,568 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 04:24:34,593 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 04:24:34,593 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 04:24:34,593 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 04:24:34,594 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 04:24:34,596 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 04:24:34,596 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 04:24:34,596 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 04:24:34,596 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 04:24:34,597 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 04:24:34,597 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 04:24:34,597 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 04:24:34,597 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 04:24:34,597 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 04:24:34,597 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 04:24:34,598 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 04:24:34,598 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 04:24:34,598 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 04:24:34,601 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 04:24:34,601 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 04:24:34,658 INFO ]: Repository-Root is: /tmp [2018-06-22 04:24:34,672 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 04:24:34,675 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 04:24:34,677 INFO ]: Initializing SmtParser... [2018-06-22 04:24:34,677 INFO ]: SmtParser initialized [2018-06-22 04:24:34,678 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/kundu.smt2 [2018-06-22 04:24:34,680 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 04:24:34,782 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/kundu.smt2 unknown [2018-06-22 04:24:35,646 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/kundu.smt2 [2018-06-22 04:24:35,651 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 04:24:35,657 INFO ]: Walking toolchain with 4 elements. [2018-06-22 04:24:35,657 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 04:24:35,657 INFO ]: Initializing ChcToBoogie... [2018-06-22 04:24:35,658 INFO ]: ChcToBoogie initialized [2018-06-22 04:24:35,661 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 04:24:35" (1/1) ... [2018-06-22 04:24:35,750 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:24:35 Unit [2018-06-22 04:24:35,750 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 04:24:35,760 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 04:24:35,760 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 04:24:35,760 INFO ]: Boogie Preprocessor initialized [2018-06-22 04:24:35,801 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:24:35" (1/1) ... [2018-06-22 04:24:35,802 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:24:35" (1/1) ... [2018-06-22 04:24:35,842 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:24:35" (1/1) ... [2018-06-22 04:24:35,842 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:24:35" (1/1) ... [2018-06-22 04:24:35,877 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:24:35" (1/1) ... [2018-06-22 04:24:35,879 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:24:35" (1/1) ... [2018-06-22 04:24:35,883 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:24:35" (1/1) ... [2018-06-22 04:24:35,889 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 04:24:35,894 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 04:24:35,894 INFO ]: Initializing RCFGBuilder... [2018-06-22 04:24:35,894 INFO ]: RCFGBuilder initialized [2018-06-22 04:24:35,895 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:24:35" (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 04:24:35,922 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 04:24:35,922 INFO ]: Found specification of procedure gotoProc [2018-06-22 04:24:35,922 INFO ]: Found implementation of procedure gotoProc [2018-06-22 04:24:35,922 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 04:24:35,922 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 04:24:35,922 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 04:24:36,668 INFO ]: Using library mode [2018-06-22 04:24:36,669 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 04:24:36 BoogieIcfgContainer [2018-06-22 04:24:36,669 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 04:24:36,671 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 04:24:36,671 INFO ]: Initializing TraceAbstraction... [2018-06-22 04:24:36,675 INFO ]: TraceAbstraction initialized [2018-06-22 04:24:36,676 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 04:24:35" (1/3) ... [2018-06-22 04:24:36,677 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e250bdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 04:24:36, skipping insertion in model container [2018-06-22 04:24:36,677 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:24:35" (2/3) ... [2018-06-22 04:24:36,677 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e250bdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 04:24:36, skipping insertion in model container [2018-06-22 04:24:36,677 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 04:24:36" (3/3) ... [2018-06-22 04:24:36,679 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 04:24:36,688 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 04:24:36,698 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 04:24:36,752 INFO ]: Using default assertion order modulation [2018-06-22 04:24:36,752 INFO ]: Interprodecural is true [2018-06-22 04:24:36,753 INFO ]: Hoare is false [2018-06-22 04:24:36,753 INFO ]: Compute interpolants for FPandBP [2018-06-22 04:24:36,753 INFO ]: Backedges is TWOTRACK [2018-06-22 04:24:36,753 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 04:24:36,753 INFO ]: Difference is false [2018-06-22 04:24:36,753 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 04:24:36,753 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 04:24:36,769 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 04:24:36,780 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 04:24:36,780 INFO ]: Found error trace [2018-06-22 04:24:36,781 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:24:36,781 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:24:36,786 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-22 04:24:36,787 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:24:36,787 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:24:36,825 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:24:36,825 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:24:36,825 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:24:36,918 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:24:37,062 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:24:37,064 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 04:24:37,065 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 04:24:37,067 INFO ]: Interpolant automaton has 3 states [2018-06-22 04:24:37,082 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 04:24:37,083 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 04:24:37,086 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 04:24:37,212 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:24:37,212 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 04:24:37,214 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 04:24:37,216 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 04:24:37,216 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:24:37,226 INFO ]: With dead ends: 9 [2018-06-22 04:24:37,226 INFO ]: Without dead ends: 9 [2018-06-22 04:24:37,228 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 04:24:37,246 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 04:24:37,261 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 04:24:37,263 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 04:24:37,263 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 04:24:37,264 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 04:24:37,265 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:24:37,265 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 04:24:37,265 INFO ]: Interpolant automaton has 3 states. [2018-06-22 04:24:37,265 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 04:24:37,265 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 04:24:37,265 INFO ]: Found error trace [2018-06-22 04:24:37,265 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:24:37,265 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:24:37,265 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-22 04:24:37,265 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:24:37,265 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:24:37,266 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:24:37,266 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:24:37,266 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:24:37,472 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:24:37,722 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:24:37,722 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:24:37,722 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 04:24:37,729 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:24:37,974 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:24:37,988 INFO ]: Computing forward predicates... [2018-06-22 04:24:39,082 WARN ]: Spent 427.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-06-22 04:24:39,101 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:24:39,136 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 04:24:39,136 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-22 04:24:39,137 INFO ]: Interpolant automaton has 6 states [2018-06-22 04:24:39,137 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 04:24:39,137 INFO ]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-22 04:24:39,137 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-06-22 04:24:39,384 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:24:39,385 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 04:24:39,385 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 04:24:39,385 INFO ]: Start accepts. Automaton has 6 states. Word has length 8 [2018-06-22 04:24:39,385 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:24:39,385 INFO ]: With dead ends: 10 [2018-06-22 04:24:39,386 INFO ]: Without dead ends: 10 [2018-06-22 04:24:39,386 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-06-22 04:24:39,386 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 04:24:39,387 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 04:24:39,387 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 04:24:39,388 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 04:24:39,388 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 04:24:39,388 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:24:39,388 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 04:24:39,388 INFO ]: Interpolant automaton has 6 states. [2018-06-22 04:24:39,388 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 04:24:39,388 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 04:24:39,388 INFO ]: Found error trace [2018-06-22 04:24:39,388 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:24:39,388 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:24:39,388 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-22 04:24:39,388 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:24:39,388 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:24:39,389 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:24:39,389 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:24:39,389 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:24:39,562 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:24:40,048 WARN ]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2018-06-22 04:24:40,272 WARN ]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 04:24:40,273 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:24:40,273 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:24:40,273 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 04:24:40,287 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 04:24:40,491 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 04:24:40,491 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:24:40,507 INFO ]: Computing forward predicates... [2018-06-22 04:24:40,790 WARN ]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 04:24:41,771 WARN ]: Spent 478.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-06-22 04:24:43,719 WARN ]: Spent 528.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 17 [2018-06-22 04:24:43,723 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:24:43,744 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 04:24:43,744 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-06-22 04:24:43,744 INFO ]: Interpolant automaton has 8 states [2018-06-22 04:24:43,744 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 04:24:43,744 INFO ]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-06-22 04:24:43,744 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 8 states. [2018-06-22 04:24:43,922 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:24:43,922 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 04:24:43,923 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 04:24:43,923 INFO ]: Start accepts. Automaton has 8 states. Word has length 9 [2018-06-22 04:24:43,923 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:24:43,923 INFO ]: With dead ends: 12 [2018-06-22 04:24:43,923 INFO ]: Without dead ends: 12 [2018-06-22 04:24:43,924 INFO ]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2018-06-22 04:24:43,924 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 04:24:43,925 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 04:24:43,925 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 04:24:43,925 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 04:24:43,925 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-06-22 04:24:43,925 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:24:43,925 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 04:24:43,925 INFO ]: Interpolant automaton has 8 states. [2018-06-22 04:24:43,926 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 04:24:43,926 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 04:24:43,926 INFO ]: Found error trace [2018-06-22 04:24:43,926 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:24:43,926 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:24:43,926 INFO ]: Analyzing trace with hash 201204236, now seen corresponding path program 3 times [2018-06-22 04:24:43,926 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:24:43,926 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:24:43,927 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:24:43,927 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 04:24:43,927 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:24:44,148 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:24:44,760 WARN ]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-06-22 04:24:44,786 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:24:44,786 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:24:44,786 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 04:24:44,792 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 04:24:45,036 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 04:24:45,036 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:24:45,053 INFO ]: Computing forward predicates... [2018-06-22 04:24:46,065 WARN ]: Spent 119.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2018-06-22 04:24:49,892 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:24:49,916 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 04:24:49,916 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-06-22 04:24:49,916 INFO ]: Interpolant automaton has 12 states [2018-06-22 04:24:49,916 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 04:24:49,917 INFO ]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-06-22 04:24:49,917 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-06-22 04:24:50,189 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:24:50,189 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 04:24:50,189 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 04:24:50,189 INFO ]: Start accepts. Automaton has 12 states. Word has length 11 [2018-06-22 04:24:50,189 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:24:50,189 INFO ]: With dead ends: 13 [2018-06-22 04:24:50,189 INFO ]: Without dead ends: 13 [2018-06-22 04:24:50,190 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2018-06-22 04:24:50,190 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 04:24:50,191 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 04:24:50,191 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 04:24:50,191 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 04:24:50,191 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-22 04:24:50,192 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:24:50,192 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 04:24:50,192 INFO ]: Interpolant automaton has 12 states. [2018-06-22 04:24:50,192 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 04:24:50,192 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 04:24:50,192 INFO ]: Found error trace [2018-06-22 04:24:50,192 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:24:50,192 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:24:50,192 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 4 times [2018-06-22 04:24:50,192 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:24:50,192 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:24:50,193 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:24:50,193 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 04:24:50,193 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:24:50,536 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:24:51,578 WARN ]: Spent 510.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2018-06-22 04:24:51,692 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:24:51,692 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:24:51,692 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) [2018-06-22 04:24:51,705 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown