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/ctigar/fig1a.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 05:23:35,737 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 05:23:35,738 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 05:23:35,749 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 05:23:35,749 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 05:23:35,750 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 05:23:35,751 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 05:23:35,753 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 05:23:35,755 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 05:23:35,756 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 05:23:35,757 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 05:23:35,757 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 05:23:35,758 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 05:23:35,759 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 05:23:35,760 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 05:23:35,761 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 05:23:35,766 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 05:23:35,768 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 05:23:35,777 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 05:23:35,778 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 05:23:35,779 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 05:23:35,785 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 05:23:35,785 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 05:23:35,785 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 05:23:35,786 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 05:23:35,787 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 05:23:35,787 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 05:23:35,791 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 05:23:35,792 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 05:23:35,792 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 05:23:35,793 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 05:23:35,793 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 05:23:35,794 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 05:23:35,799 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 05:23:35,800 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 05:23:35,800 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 05:23:35,846 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 05:23:35,847 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 05:23:35,847 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 05:23:35,847 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 05:23:35,848 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 05:23:35,849 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 05:23:35,850 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 05:23:35,850 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 05:23:35,850 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:23:35,850 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 05:23:35,851 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 05:23:35,851 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 05:23:35,851 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 05:23:35,851 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 05:23:35,851 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 05:23:35,851 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 05:23:35,852 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 05:23:35,855 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 05:23:35,855 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 05:23:35,934 INFO ]: Repository-Root is: /tmp [2018-06-22 05:23:35,976 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 05:23:35,980 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 05:23:35,981 INFO ]: Initializing SmtParser... [2018-06-22 05:23:35,981 INFO ]: SmtParser initialized [2018-06-22 05:23:35,982 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/fig1a.c.smt2 [2018-06-22 05:23:36,006 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 05:23:36,163 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/fig1a.c.smt2 unknown [2018-06-22 05:23:36,437 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/fig1a.c.smt2 [2018-06-22 05:23:36,442 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 05:23:36,452 INFO ]: Walking toolchain with 4 elements. [2018-06-22 05:23:36,452 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 05:23:36,453 INFO ]: Initializing ChcToBoogie... [2018-06-22 05:23:36,453 INFO ]: ChcToBoogie initialized [2018-06-22 05:23:36,548 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:23:36" (1/1) ... [2018-06-22 05:23:36,688 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:23:36 Unit [2018-06-22 05:23:36,689 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 05:23:36,689 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 05:23:36,689 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 05:23:36,690 INFO ]: Boogie Preprocessor initialized [2018-06-22 05:23:36,724 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:23:36" (1/1) ... [2018-06-22 05:23:36,724 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:23:36" (1/1) ... [2018-06-22 05:23:36,736 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:23:36" (1/1) ... [2018-06-22 05:23:36,736 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:23:36" (1/1) ... [2018-06-22 05:23:36,739 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:23:36" (1/1) ... [2018-06-22 05:23:36,740 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:23:36" (1/1) ... [2018-06-22 05:23:36,741 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:23:36" (1/1) ... [2018-06-22 05:23:36,743 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 05:23:36,744 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 05:23:36,744 INFO ]: Initializing RCFGBuilder... [2018-06-22 05:23:36,744 INFO ]: RCFGBuilder initialized [2018-06-22 05:23:36,745 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:23:36" (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) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:23:36,765 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 05:23:36,765 INFO ]: Found specification of procedure gotoProc [2018-06-22 05:23:36,765 INFO ]: Found implementation of procedure gotoProc [2018-06-22 05:23:36,765 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 05:23:36,765 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 05:23:36,765 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 05:23:37,017 INFO ]: Using library mode [2018-06-22 05:23:37,018 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:23:37 BoogieIcfgContainer [2018-06-22 05:23:37,018 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 05:23:37,021 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 05:23:37,021 INFO ]: Initializing TraceAbstraction... [2018-06-22 05:23:37,041 INFO ]: TraceAbstraction initialized [2018-06-22 05:23:37,042 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:23:36" (1/3) ... [2018-06-22 05:23:37,042 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51b49706 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:23:37, skipping insertion in model container [2018-06-22 05:23:37,043 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:23:36" (2/3) ... [2018-06-22 05:23:37,043 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51b49706 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:23:37, skipping insertion in model container [2018-06-22 05:23:37,043 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:23:37" (3/3) ... [2018-06-22 05:23:37,045 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 05:23:37,053 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 05:23:37,071 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 05:23:37,199 INFO ]: Using default assertion order modulation [2018-06-22 05:23:37,200 INFO ]: Interprodecural is true [2018-06-22 05:23:37,200 INFO ]: Hoare is false [2018-06-22 05:23:37,200 INFO ]: Compute interpolants for FPandBP [2018-06-22 05:23:37,200 INFO ]: Backedges is TWOTRACK [2018-06-22 05:23:37,200 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 05:23:37,200 INFO ]: Difference is false [2018-06-22 05:23:37,200 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 05:23:37,200 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 05:23:37,249 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 05:23:37,261 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 05:23:37,261 INFO ]: Found error trace [2018-06-22 05:23:37,262 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:23:37,262 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:23:37,268 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-22 05:23:37,270 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:23:37,270 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:23:37,334 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:23:37,334 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:23:37,334 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:23:37,407 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:23:37,494 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:23:37,506 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 05:23:37,506 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 05:23:37,508 INFO ]: Interpolant automaton has 3 states [2018-06-22 05:23:37,525 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 05:23:37,525 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:23:37,545 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 05:23:37,636 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:23:37,637 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 05:23:37,637 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 05:23:37,639 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 05:23:37,639 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:23:37,647 INFO ]: With dead ends: 9 [2018-06-22 05:23:37,648 INFO ]: Without dead ends: 9 [2018-06-22 05:23:37,649 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 05:23:37,663 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 05:23:37,679 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 05:23:37,680 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 05:23:37,681 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 05:23:37,682 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 05:23:37,682 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:23:37,682 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 05:23:37,682 INFO ]: Interpolant automaton has 3 states. [2018-06-22 05:23:37,683 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 05:23:37,683 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 05:23:37,683 INFO ]: Found error trace [2018-06-22 05:23:37,683 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:23:37,683 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:23:37,683 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-22 05:23:37,683 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:23:37,683 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:23:37,684 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:23:37,684 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:23:37,684 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:23:37,707 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:23:37,831 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:23:37,831 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:23:37,831 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 05:23:37,838 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:23:37,887 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:23:37,896 INFO ]: Computing forward predicates... [2018-06-22 05:23:37,998 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:23:38,020 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:23:38,020 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 05:23:38,020 INFO ]: Interpolant automaton has 5 states [2018-06-22 05:23:38,021 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 05:23:38,021 INFO ]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-22 05:23:38,021 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 05:23:38,106 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:23:38,106 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 05:23:38,106 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 05:23:38,106 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 05:23:38,106 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:23:38,107 INFO ]: With dead ends: 11 [2018-06-22 05:23:38,107 INFO ]: Without dead ends: 11 [2018-06-22 05:23:38,108 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:23:38,108 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 05:23:38,109 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 05:23:38,109 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 05:23:38,109 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 05:23:38,109 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-22 05:23:38,110 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:23:38,110 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 05:23:38,110 INFO ]: Interpolant automaton has 5 states. [2018-06-22 05:23:38,110 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 05:23:38,110 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 05:23:38,110 INFO ]: Found error trace [2018-06-22 05:23:38,110 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:23:38,110 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:23:38,110 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 2 times [2018-06-22 05:23:38,110 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:23:38,110 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:23:38,111 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:23:38,111 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:23:38,111 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:23:38,158 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:23:38,445 WARN ]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 05:23:38,543 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:23:38,543 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:23:38,543 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 05:23:38,550 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 05:23:38,582 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:23:38,582 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:23:38,585 INFO ]: Computing forward predicates... [2018-06-22 05:23:39,236 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:23:39,271 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:23:39,271 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-22 05:23:39,272 INFO ]: Interpolant automaton has 7 states [2018-06-22 05:23:39,272 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 05:23:39,272 INFO ]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-06-22 05:23:39,272 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-06-22 05:23:39,846 WARN ]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 05:23:40,284 WARN ]: Spent 313.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2018-06-22 05:23:40,286 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:23:40,286 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 05:23:40,286 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 05:23:40,286 INFO ]: Start accepts. Automaton has 7 states. Word has length 10 [2018-06-22 05:23:40,286 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:23:40,286 INFO ]: With dead ends: 13 [2018-06-22 05:23:40,286 INFO ]: Without dead ends: 13 [2018-06-22 05:23:40,287 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-06-22 05:23:40,287 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 05:23:40,288 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 05:23:40,288 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 05:23:40,292 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 05:23:40,292 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-06-22 05:23:40,292 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:23:40,292 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 05:23:40,292 INFO ]: Interpolant automaton has 7 states. [2018-06-22 05:23:40,292 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 05:23:40,292 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 05:23:40,292 INFO ]: Found error trace [2018-06-22 05:23:40,292 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:23:40,292 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:23:40,293 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 3 times [2018-06-22 05:23:40,293 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:23:40,293 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:23:40,294 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:23:40,294 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:23:40,294 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:23:40,391 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:23:40,759 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:23:40,759 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:23:40,759 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 05:23:40,769 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 05:23:40,820 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 05:23:40,820 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:23:40,824 INFO ]: Computing forward predicates... [2018-06-22 05:23:41,372 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:23:41,402 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 05:23:45,395 WARN ]: Spent 217.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 21 [2018-06-22 05:23:46,898 WARN ]: Spent 198.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 14 [2018-06-22 05:23:48,205 WARN ]: Spent 712.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 10 [2018-06-22 05:23:48,751 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:23:48,774 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:23:48,774 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 05:23:48,774 INFO ]: Interpolant automaton has 13 states [2018-06-22 05:23:48,775 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 05:23:48,775 INFO ]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2018-06-22 05:23:48,775 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 13 states. [2018-06-22 05:23:49,049 WARN ]: Spent 117.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 16 [2018-06-22 05:23:49,173 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:23:49,173 INFO ]: Finished difference Result 14 states and 14 transitions. [2018-06-22 05:23:49,173 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 05:23:49,173 INFO ]: Start accepts. Automaton has 13 states. Word has length 12 [2018-06-22 05:23:49,173 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:23:49,174 INFO ]: With dead ends: 14 [2018-06-22 05:23:49,174 INFO ]: Without dead ends: 14 [2018-06-22 05:23:49,175 INFO ]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=121, Invalid=185, Unknown=0, NotChecked=0, Total=306 [2018-06-22 05:23:49,175 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-22 05:23:49,176 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-06-22 05:23:49,176 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-22 05:23:49,177 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-06-22 05:23:49,177 INFO ]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-06-22 05:23:49,177 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:23:49,177 INFO ]: Abstraction has 14 states and 14 transitions. [2018-06-22 05:23:49,177 INFO ]: Interpolant automaton has 13 states. [2018-06-22 05:23:49,177 INFO ]: Start isEmpty. Operand 14 states and 14 transitions. [2018-06-22 05:23:49,177 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 05:23:49,177 INFO ]: Found error trace [2018-06-22 05:23:49,177 INFO ]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:23:49,177 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:23:49,178 INFO ]: Analyzing trace with hash 23503628, now seen corresponding path program 4 times [2018-06-22 05:23:49,178 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:23:49,178 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:23:49,179 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:23:49,179 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:23:49,179 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:23:49,244 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:23:49,851 WARN ]: Spent 224.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2018-06-22 05:23:49,925 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:23:49,925 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:23:49,925 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 05:23:49,935 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 05:23:49,986 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 05:23:49,986 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:23:49,991 INFO ]: Computing forward predicates... [2018-06-22 05:23:50,380 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:24:01,456 WARN ]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 17 [2018-06-22 05:24:03,147 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:24:03,185 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:24:03,185 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2018-06-22 05:24:03,186 INFO ]: Interpolant automaton has 15 states [2018-06-22 05:24:03,186 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-22 05:24:03,186 INFO ]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2018-06-22 05:24:03,186 INFO ]: Start difference. First operand 14 states and 14 transitions. Second operand 15 states. [2018-06-22 05:24:03,399 WARN ]: Spent 171.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 15 [2018-06-22 05:24:03,935 WARN ]: Spent 114.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 19 [2018-06-22 05:24:03,936 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:24:03,936 INFO ]: Finished difference Result 16 states and 16 transitions. [2018-06-22 05:24:03,936 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 05:24:03,936 INFO ]: Start accepts. Automaton has 15 states. Word has length 13 [2018-06-22 05:24:03,936 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:24:03,937 INFO ]: With dead ends: 16 [2018-06-22 05:24:03,937 INFO ]: Without dead ends: 16 [2018-06-22 05:24:03,937 INFO ]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2018-06-22 05:24:03,937 INFO ]: Start minimizeSevpa. Operand 16 states. [2018-06-22 05:24:03,939 INFO ]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-06-22 05:24:03,939 INFO ]: Start removeUnreachable. Operand 16 states. [2018-06-22 05:24:03,940 INFO ]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-06-22 05:24:03,940 INFO ]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-06-22 05:24:03,940 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:24:03,940 INFO ]: Abstraction has 16 states and 16 transitions. [2018-06-22 05:24:03,940 INFO ]: Interpolant automaton has 15 states. [2018-06-22 05:24:03,940 INFO ]: Start isEmpty. Operand 16 states and 16 transitions. [2018-06-22 05:24:03,940 INFO ]: Finished isEmpty. Found accepting run of length 16 [2018-06-22 05:24:03,940 INFO ]: Found error trace [2018-06-22 05:24:03,940 INFO ]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:24:03,940 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:24:03,940 INFO ]: Analyzing trace with hash 1051911180, now seen corresponding path program 5 times [2018-06-22 05:24:03,940 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:24:03,940 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:24:03,941 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:24:03,941 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:24:03,941 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:24:04,047 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:24:04,497 INFO ]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:24:04,497 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:24:04,497 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 05:24:04,511 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 05:24:04,568 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-06-22 05:24:04,568 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:24:04,573 INFO ]: Computing forward predicates... [2018-06-22 05:24:07,330 WARN ]: Spent 132.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 21 [2018-06-22 05:24:08,014 INFO ]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:24:08,036 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:24:08,036 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2018-06-22 05:24:08,036 INFO ]: Interpolant automaton has 19 states [2018-06-22 05:24:08,036 INFO ]: Constructing interpolant automaton starting with 19 interpolants. [2018-06-22 05:24:08,036 INFO ]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2018-06-22 05:24:08,036 INFO ]: Start difference. First operand 16 states and 16 transitions. Second operand 19 states. [2018-06-22 05:24:08,691 WARN ]: Spent 479.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2018-06-22 05:24:08,906 WARN ]: Spent 126.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2018-06-22 05:24:09,145 WARN ]: Spent 226.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 16 [2018-06-22 05:24:09,233 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:24:09,233 INFO ]: Finished difference Result 17 states and 17 transitions. [2018-06-22 05:24:09,233 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 05:24:09,233 INFO ]: Start accepts. Automaton has 19 states. Word has length 15 [2018-06-22 05:24:09,233 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:24:09,233 INFO ]: With dead ends: 17 [2018-06-22 05:24:09,234 INFO ]: Without dead ends: 17 [2018-06-22 05:24:09,234 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=223, Invalid=533, Unknown=0, NotChecked=0, Total=756 [2018-06-22 05:24:09,234 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 05:24:09,236 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 05:24:09,236 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 05:24:09,236 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-06-22 05:24:09,236 INFO ]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-06-22 05:24:09,236 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:24:09,236 INFO ]: Abstraction has 17 states and 17 transitions. [2018-06-22 05:24:09,236 INFO ]: Interpolant automaton has 19 states. [2018-06-22 05:24:09,237 INFO ]: Start isEmpty. Operand 17 states and 17 transitions. [2018-06-22 05:24:09,237 INFO ]: Finished isEmpty. Found accepting run of length 17 [2018-06-22 05:24:09,237 INFO ]: Found error trace [2018-06-22 05:24:09,237 INFO ]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:24:09,237 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:24:09,237 INFO ]: Analyzing trace with hash -1752374252, now seen corresponding path program 6 times [2018-06-22 05:24:09,237 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:24:09,237 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:24:09,238 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:24:09,238 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:24:09,238 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:24:09,333 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:24:09,912 WARN ]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 05:24:10,953 WARN ]: Spent 969.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2018-06-22 05:24:11,270 INFO ]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:24:11,270 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:24:11,270 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 05:24:11,276 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 05:24:11,339 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-06-22 05:24:11,339 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:24:11,343 INFO ]: Computing forward predicates... [2018-06-22 05:24:12,604 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:24:12,630 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:24:12,651 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:24:12,687 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:24:12,694 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:24:12,710 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:24:12,724 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:24:12,736 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:24:12,746 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:24:20,962 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:24:20,979 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:24:20,992 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:24:21,011 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:24:24,610 WARN ]: Spent 186.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 21 [2018-06-22 05:24:26,793 WARN ]: Spent 397.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 20 [2018-06-22 05:24:26,905 INFO ]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:24:26,926 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:24:26,926 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2018-06-22 05:24:26,926 INFO ]: Interpolant automaton has 19 states [2018-06-22 05:24:26,926 INFO ]: Constructing interpolant automaton starting with 19 interpolants. [2018-06-22 05:24:26,926 INFO ]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2018-06-22 05:24:26,926 INFO ]: Start difference. First operand 17 states and 17 transitions. Second operand 19 states. [2018-06-22 05:24:27,169 WARN ]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2018-06-22 05:24:27,285 WARN ]: Spent 104.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2018-06-22 05:24:27,443 WARN ]: Spent 144.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2018-06-22 05:24:27,904 WARN ]: Spent 129.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 28 [2018-06-22 05:24:27,905 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:24:27,905 INFO ]: Finished difference Result 19 states and 19 transitions. [2018-06-22 05:24:27,905 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-06-22 05:24:27,906 INFO ]: Start accepts. Automaton has 19 states. Word has length 16 [2018-06-22 05:24:27,906 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:24:27,906 INFO ]: With dead ends: 19 [2018-06-22 05:24:27,906 INFO ]: Without dead ends: 19 [2018-06-22 05:24:27,907 INFO ]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=246, Invalid=566, Unknown=0, NotChecked=0, Total=812 [2018-06-22 05:24:27,907 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 05:24:27,909 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 05:24:27,909 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 05:24:27,909 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-06-22 05:24:27,909 INFO ]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-06-22 05:24:27,909 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:24:27,909 INFO ]: Abstraction has 19 states and 19 transitions. [2018-06-22 05:24:27,909 INFO ]: Interpolant automaton has 19 states. [2018-06-22 05:24:27,909 INFO ]: Start isEmpty. Operand 19 states and 19 transitions. [2018-06-22 05:24:27,910 INFO ]: Finished isEmpty. Found accepting run of length 19 [2018-06-22 05:24:27,910 INFO ]: Found error trace [2018-06-22 05:24:27,910 INFO ]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:24:27,910 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:24:27,910 INFO ]: Analyzing trace with hash -464714988, now seen corresponding path program 7 times [2018-06-22 05:24:27,910 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:24:27,910 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:24:27,911 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:24:27,911 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:24:27,911 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:24:28,050 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:24:28,837 WARN ]: Spent 477.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 8 [2018-06-22 05:24:29,066 WARN ]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-22 05:24:29,559 WARN ]: Spent 147.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2018-06-22 05:24:29,608 INFO ]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:24:29,608 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:24:29,608 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 05:24:29,615 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:24:29,663 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:24:29,667 INFO ]: Computing forward predicates... [2018-06-22 05:24:31,568 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:24:33,832 WARN ]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 21 [2018-06-22 05:24:34,513 WARN ]: Spent 453.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 20 [2018-06-22 05:24:34,638 INFO ]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:24:34,815 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:24:34,819 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2018-06-22 05:24:34,819 INFO ]: Interpolant automaton has 21 states [2018-06-22 05:24:34,819 INFO ]: Constructing interpolant automaton starting with 21 interpolants. [2018-06-22 05:24:34,819 INFO ]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2018-06-22 05:24:34,819 INFO ]: Start difference. First operand 19 states and 19 transitions. Second operand 21 states. [2018-06-22 05:24:34,986 WARN ]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 22 Received shutdown request... [2018-06-22 05:24:35,086 WARN ]: Removed 2 from assertion stack [2018-06-22 05:24:35,087 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 05:24:35,087 WARN ]: Verification canceled [2018-06-22 05:24:35,091 WARN ]: Timeout [2018-06-22 05:24:35,091 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 05:24:35 BoogieIcfgContainer [2018-06-22 05:24:35,091 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 05:24:35,177 INFO ]: Toolchain (without parser) took 58651.58 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 264.9 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 134.3 MB. Max. memory is 3.6 GB. [2018-06-22 05:24:35,178 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 308.8 MB. Free memory is still 274.6 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 05:24:35,178 INFO ]: ChcToBoogie took 236.55 ms. Allocated memory is still 308.8 MB. Free memory was 263.9 MB in the beginning and 261.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:24:35,178 INFO ]: Boogie Preprocessor took 53.62 ms. Allocated memory is still 308.8 MB. Free memory was 261.9 MB in the beginning and 260.9 MB in the end (delta: 996.2 kB). Peak memory consumption was 996.2 kB. Max. memory is 3.6 GB. [2018-06-22 05:24:35,179 INFO ]: RCFGBuilder took 274.22 ms. Allocated memory is still 308.8 MB. Free memory was 260.9 MB in the beginning and 252.3 MB in the end (delta: 8.6 MB). Peak memory consumption was 8.6 MB. Max. memory is 3.6 GB. [2018-06-22 05:24:35,179 INFO ]: TraceAbstraction took 58070.23 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 252.3 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 121.7 MB. Max. memory is 3.6 GB. [2018-06-22 05:24:35,182 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.08 ms. Allocated memory is still 308.8 MB. Free memory is still 274.6 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 236.55 ms. Allocated memory is still 308.8 MB. Free memory was 263.9 MB in the beginning and 261.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 53.62 ms. Allocated memory is still 308.8 MB. Free memory was 261.9 MB in the beginning and 260.9 MB in the end (delta: 996.2 kB). Peak memory consumption was 996.2 kB. Max. memory is 3.6 GB. * RCFGBuilder took 274.22 ms. Allocated memory is still 308.8 MB. Free memory was 260.9 MB in the beginning and 252.3 MB in the end (delta: 8.6 MB). Peak memory consumption was 8.6 MB. Max. memory is 3.6 GB. * TraceAbstraction took 58070.23 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 252.3 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 121.7 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was constructing difference of abstraction (19states) and interpolant automaton (currently 4 states, 21 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 60. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 57.8s OverallTime, 8 OverallIterations, 11 TraceHistogramMax, 4.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 52 SDtfs, 33 SDslu, 223 SDs, 0 SdLazy, 85 SolverSat, 84 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 192 GetRequests, 53 SyntacticMatches, 13 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 13.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred 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, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 51.4s InterpolantComputationTime, 191 NumberOfCodeBlocks, 191 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 176 ConstructedInterpolants, 0 QuantifiedInterpolants, 23892 SizeOfPredicates, 28 NumberOfNonLiveVariables, 1363 ConjunctsInSsa, 424 ConjunctsInUnsatCore, 15 InterpolantComputations, 1 PerfectInterpolantSequences, 0/380 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/fig1a.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_05-24-35-306.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/fig1a.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_05-24-35-306.csv Completed graceful shutdown