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/sally-chc-benchmarks/lfht/lfht_2_mini_cleaned.posted_1.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 12:31:34,695 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 12:31:34,697 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 12:31:34,712 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 12:31:34,712 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 12:31:34,713 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 12:31:34,714 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 12:31:34,718 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 12:31:34,720 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 12:31:34,722 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 12:31:34,723 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 12:31:34,723 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 12:31:34,724 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 12:31:34,725 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 12:31:34,729 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 12:31:34,730 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 12:31:34,732 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 12:31:34,744 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 12:31:34,746 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 12:31:34,747 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 12:31:34,748 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 12:31:34,750 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 12:31:34,751 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 12:31:34,751 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 12:31:34,753 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 12:31:34,755 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 12:31:34,755 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 12:31:34,756 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 12:31:34,757 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 12:31:34,757 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 12:31:34,758 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 12:31:34,759 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 12:31:34,759 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 12:31:34,759 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 12:31:34,760 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 12:31:34,760 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 12:31:34,786 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 12:31:34,786 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 12:31:34,786 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 12:31:34,786 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 12:31:34,787 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 12:31:34,788 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 12:31:34,789 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 12:31:34,789 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 12:31:34,789 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 12:31:34,790 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 12:31:34,790 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 12:31:34,790 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 12:31:34,790 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 12:31:34,790 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 12:31:34,791 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 12:31:34,791 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 12:31:34,791 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 12:31:34,791 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 12:31:34,791 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 12:31:34,793 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 12:31:34,793 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 12:31:34,833 INFO ]: Repository-Root is: /tmp [2018-06-22 12:31:34,847 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 12:31:34,851 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 12:31:34,852 INFO ]: Initializing SmtParser... [2018-06-22 12:31:34,853 INFO ]: SmtParser initialized [2018-06-22 12:31:34,853 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/sally-chc-benchmarks/lfht/lfht_2_mini_cleaned.posted_1.smt2 [2018-06-22 12:31:34,855 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 12:31:34,944 INFO ]: Executing SMT file /storage/chc-comp/sally-chc-benchmarks/lfht/lfht_2_mini_cleaned.posted_1.smt2 unknown [2018-06-22 12:31:35,313 INFO ]: Succesfully executed SMT file /storage/chc-comp/sally-chc-benchmarks/lfht/lfht_2_mini_cleaned.posted_1.smt2 [2018-06-22 12:31:35,318 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 12:31:35,325 INFO ]: Walking toolchain with 4 elements. [2018-06-22 12:31:35,325 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 12:31:35,325 INFO ]: Initializing ChcToBoogie... [2018-06-22 12:31:35,326 INFO ]: ChcToBoogie initialized [2018-06-22 12:31:35,329 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 12:31:35" (1/1) ... [2018-06-22 12:31:35,389 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:31:35 Unit [2018-06-22 12:31:35,389 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 12:31:35,390 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 12:31:35,390 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 12:31:35,390 INFO ]: Boogie Preprocessor initialized [2018-06-22 12:31:35,413 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:31:35" (1/1) ... [2018-06-22 12:31:35,413 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:31:35" (1/1) ... [2018-06-22 12:31:35,433 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:31:35" (1/1) ... [2018-06-22 12:31:35,434 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:31:35" (1/1) ... [2018-06-22 12:31:35,450 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:31:35" (1/1) ... [2018-06-22 12:31:35,451 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:31:35" (1/1) ... [2018-06-22 12:31:35,453 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:31:35" (1/1) ... [2018-06-22 12:31:35,456 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 12:31:35,457 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 12:31:35,457 INFO ]: Initializing RCFGBuilder... [2018-06-22 12:31:35,457 INFO ]: RCFGBuilder initialized [2018-06-22 12:31:35,458 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:31:35" (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 12:31:35,480 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 12:31:35,481 INFO ]: Found specification of procedure False [2018-06-22 12:31:35,481 INFO ]: Found implementation of procedure False [2018-06-22 12:31:35,481 INFO ]: Specification and implementation of procedure invariant given in one single declaration [2018-06-22 12:31:35,481 INFO ]: Found specification of procedure invariant [2018-06-22 12:31:35,481 INFO ]: Found implementation of procedure invariant [2018-06-22 12:31:35,481 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 12:31:35,481 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 12:31:35,481 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 12:31:35,786 INFO ]: Using library mode [2018-06-22 12:31:35,786 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 12:31:35 BoogieIcfgContainer [2018-06-22 12:31:35,786 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 12:31:35,788 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 12:31:35,788 INFO ]: Initializing TraceAbstraction... [2018-06-22 12:31:35,801 INFO ]: TraceAbstraction initialized [2018-06-22 12:31:35,801 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 12:31:35" (1/3) ... [2018-06-22 12:31:35,802 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1806af62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 12:31:35, skipping insertion in model container [2018-06-22 12:31:35,802 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:31:35" (2/3) ... [2018-06-22 12:31:35,803 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1806af62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 12:31:35, skipping insertion in model container [2018-06-22 12:31:35,803 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 12:31:35" (3/3) ... [2018-06-22 12:31:35,805 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 12:31:35,816 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 12:31:35,826 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 12:31:35,870 INFO ]: Using default assertion order modulation [2018-06-22 12:31:35,870 INFO ]: Interprodecural is true [2018-06-22 12:31:35,870 INFO ]: Hoare is false [2018-06-22 12:31:35,870 INFO ]: Compute interpolants for FPandBP [2018-06-22 12:31:35,870 INFO ]: Backedges is TWOTRACK [2018-06-22 12:31:35,870 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 12:31:35,870 INFO ]: Difference is false [2018-06-22 12:31:35,870 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 12:31:35,870 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 12:31:35,885 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 12:31:35,895 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 12:31:35,896 INFO ]: Found error trace [2018-06-22 12:31:35,896 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:31:35,897 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:31:35,902 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 12:31:35,904 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:31:35,904 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:31:35,942 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:31:35,942 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:31:35,942 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:31:36,003 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:31:36,132 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 12:31:36,135 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 12:31:36,135 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 12:31:36,136 INFO ]: Interpolant automaton has 4 states [2018-06-22 12:31:36,147 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 12:31:36,148 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 12:31:36,150 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 12:31:36,279 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:31:36,279 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 12:31:36,280 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 12:31:36,281 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 12:31:36,281 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:31:36,292 INFO ]: With dead ends: 13 [2018-06-22 12:31:36,292 INFO ]: Without dead ends: 13 [2018-06-22 12:31:36,294 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 12:31:36,309 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 12:31:36,335 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 12:31:36,336 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 12:31:36,337 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 12:31:36,339 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 12:31:36,339 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:31:36,339 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 12:31:36,339 INFO ]: Interpolant automaton has 4 states. [2018-06-22 12:31:36,339 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 12:31:36,340 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 12:31:36,340 INFO ]: Found error trace [2018-06-22 12:31:36,340 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:31:36,341 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:31:36,341 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 12:31:36,341 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:31:36,341 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:31:36,343 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:31:36,343 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:31:36,343 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:31:36,492 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:31:37,355 WARN ]: Spent 509.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 22 [2018-06-22 12:31:37,424 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 12:31:37,424 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:31:37,424 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 12:31:37,433 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:31:37,495 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:31:37,508 INFO ]: Computing forward predicates... [2018-06-22 12:31:56,389 WARN ]: Spent 1.06 s on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2018-06-22 12:31:56,577 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 12:31:56,598 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:31:56,598 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 12:31:56,598 INFO ]: Interpolant automaton has 9 states [2018-06-22 12:31:56,599 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 12:31:56,599 INFO ]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-06-22 12:31:56,599 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 12:31:56,805 WARN ]: Spent 183.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2018-06-22 12:31:57,012 WARN ]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2018-06-22 12:31:57,033 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:31:57,033 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 12:31:57,034 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 12:31:57,034 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 12:31:57,034 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:31:57,034 INFO ]: With dead ends: 15 [2018-06-22 12:31:57,034 INFO ]: Without dead ends: 15 [2018-06-22 12:31:57,035 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-06-22 12:31:57,035 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 12:31:57,038 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 12:31:57,038 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 12:31:57,038 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 12:31:57,038 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 12:31:57,038 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:31:57,038 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 12:31:57,038 INFO ]: Interpolant automaton has 9 states. [2018-06-22 12:31:57,038 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 12:31:57,039 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 12:31:57,039 INFO ]: Found error trace [2018-06-22 12:31:57,039 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:31:57,039 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:31:57,039 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 12:31:57,039 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:31:57,039 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:31:57,040 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:31:57,040 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:31:57,040 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:31:57,120 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:31:57,574 WARN ]: Spent 259.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 67 [2018-06-22 12:31:57,856 WARN ]: Spent 236.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 41 [2018-06-22 12:31:58,099 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 12:31:58,100 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:31:58,100 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 12:31:58,114 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 12:31:58,175 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 12:31:58,175 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:31:58,181 INFO ]: Computing forward predicates... [2018-06-22 12:32:13,069 WARN ]: Spent 474.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2018-06-22 12:32:26,440 WARN ]: Spent 260.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2018-06-22 12:32:26,712 INFO ]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 12:32:26,737 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:32:26,737 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 12:32:26,737 INFO ]: Interpolant automaton has 13 states [2018-06-22 12:32:26,737 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 12:32:26,739 INFO ]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2018-06-22 12:32:26,739 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 12:32:27,121 WARN ]: Spent 355.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 117 [2018-06-22 12:32:27,377 WARN ]: Spent 192.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 54 [2018-06-22 12:32:27,736 WARN ]: Spent 306.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 70 [2018-06-22 12:32:27,765 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:32:27,765 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 12:32:27,765 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 12:32:27,765 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 12:32:27,765 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:32:27,766 INFO ]: With dead ends: 17 [2018-06-22 12:32:27,766 INFO ]: Without dead ends: 17 [2018-06-22 12:32:27,766 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2018-06-22 12:32:27,766 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 12:32:27,769 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 12:32:27,769 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 12:32:27,769 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 12:32:27,769 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 12:32:27,770 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:32:27,770 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 12:32:27,770 INFO ]: Interpolant automaton has 13 states. [2018-06-22 12:32:27,770 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 12:32:27,770 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 12:32:27,770 INFO ]: Found error trace [2018-06-22 12:32:27,770 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:32:27,770 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:32:27,771 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 12:32:27,771 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:32:27,771 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:32:27,771 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:32:27,771 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 12:32:27,771 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:32:27,891 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:32:28,545 WARN ]: Spent 202.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 48 [2018-06-22 12:32:28,860 WARN ]: Spent 299.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 73 [2018-06-22 12:32:29,169 WARN ]: Spent 191.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 43 [2018-06-22 12:32:29,460 WARN ]: Spent 125.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2018-06-22 12:32:29,472 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 12:32:29,472 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:32:29,473 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 12:32:29,479 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 12:32:29,569 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 12:32:29,569 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:32:29,575 INFO ]: Computing forward predicates... Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown