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/nest-if6.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 05:42:31,753 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 05:42:31,756 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 05:42:31,770 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 05:42:31,770 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 05:42:31,771 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 05:42:31,774 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 05:42:31,776 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 05:42:31,778 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 05:42:31,778 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 05:42:31,780 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 05:42:31,781 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 05:42:31,782 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 05:42:31,783 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 05:42:31,783 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 05:42:31,786 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 05:42:31,796 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 05:42:31,797 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 05:42:31,799 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 05:42:31,800 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 05:42:31,801 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 05:42:31,806 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 05:42:31,806 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 05:42:31,807 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 05:42:31,807 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 05:42:31,808 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 05:42:31,810 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 05:42:31,811 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 05:42:31,812 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 05:42:31,812 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 05:42:31,812 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 05:42:31,813 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 05:42:31,813 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 05:42:31,817 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 05:42:31,818 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 05:42:31,818 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 05:42:31,838 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 05:42:31,840 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 05:42:31,840 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 05:42:31,841 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 05:42:31,842 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 05:42:31,842 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 05:42:31,842 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 05:42:31,842 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 05:42:31,842 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:42:31,843 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 05:42:31,843 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 05:42:31,843 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 05:42:31,843 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 05:42:31,843 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 05:42:31,843 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 05:42:31,844 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 05:42:31,845 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 05:42:31,846 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 05:42:31,846 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 05:42:31,897 INFO ]: Repository-Root is: /tmp [2018-06-22 05:42:31,914 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 05:42:31,921 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 05:42:31,922 INFO ]: Initializing SmtParser... [2018-06-22 05:42:31,922 INFO ]: SmtParser initialized [2018-06-22 05:42:31,923 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if6.c.smt2 [2018-06-22 05:42:31,925 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 05:42:32,017 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if6.c.smt2 unknown [2018-06-22 05:42:32,457 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if6.c.smt2 [2018-06-22 05:42:32,462 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 05:42:32,469 INFO ]: Walking toolchain with 4 elements. [2018-06-22 05:42:32,470 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 05:42:32,470 INFO ]: Initializing ChcToBoogie... [2018-06-22 05:42:32,470 INFO ]: ChcToBoogie initialized [2018-06-22 05:42:32,474 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:42:32" (1/1) ... [2018-06-22 05:42:32,536 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:42:32 Unit [2018-06-22 05:42:32,536 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 05:42:32,537 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 05:42:32,537 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 05:42:32,537 INFO ]: Boogie Preprocessor initialized [2018-06-22 05:42:32,558 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:42:32" (1/1) ... [2018-06-22 05:42:32,558 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:42:32" (1/1) ... [2018-06-22 05:42:32,582 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:42:32" (1/1) ... [2018-06-22 05:42:32,582 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:42:32" (1/1) ... [2018-06-22 05:42:32,600 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:42:32" (1/1) ... [2018-06-22 05:42:32,602 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:42:32" (1/1) ... [2018-06-22 05:42:32,605 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:42:32" (1/1) ... [2018-06-22 05:42:32,617 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 05:42:32,617 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 05:42:32,617 INFO ]: Initializing RCFGBuilder... [2018-06-22 05:42:32,617 INFO ]: RCFGBuilder initialized [2018-06-22 05:42:32,618 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:42:32" (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 05:42:32,644 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 05:42:32,644 INFO ]: Found specification of procedure gotoProc [2018-06-22 05:42:32,644 INFO ]: Found implementation of procedure gotoProc [2018-06-22 05:42:32,644 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 05:42:32,644 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 05:42:32,644 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 05:42:33,010 INFO ]: Using library mode [2018-06-22 05:42:33,011 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:42:33 BoogieIcfgContainer [2018-06-22 05:42:33,011 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 05:42:33,012 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 05:42:33,012 INFO ]: Initializing TraceAbstraction... [2018-06-22 05:42:33,015 INFO ]: TraceAbstraction initialized [2018-06-22 05:42:33,015 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:42:32" (1/3) ... [2018-06-22 05:42:33,016 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b12d8bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:42:33, skipping insertion in model container [2018-06-22 05:42:33,016 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:42:32" (2/3) ... [2018-06-22 05:42:33,017 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b12d8bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:42:33, skipping insertion in model container [2018-06-22 05:42:33,017 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:42:33" (3/3) ... [2018-06-22 05:42:33,025 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 05:42:33,034 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 05:42:33,043 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 05:42:33,096 INFO ]: Using default assertion order modulation [2018-06-22 05:42:33,097 INFO ]: Interprodecural is true [2018-06-22 05:42:33,097 INFO ]: Hoare is false [2018-06-22 05:42:33,097 INFO ]: Compute interpolants for FPandBP [2018-06-22 05:42:33,097 INFO ]: Backedges is TWOTRACK [2018-06-22 05:42:33,097 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 05:42:33,097 INFO ]: Difference is false [2018-06-22 05:42:33,097 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 05:42:33,097 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 05:42:33,115 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 05:42:33,126 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 05:42:33,126 INFO ]: Found error trace [2018-06-22 05:42:33,127 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:42:33,127 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:42:33,132 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-22 05:42:33,135 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:42:33,135 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:42:33,169 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:42:33,169 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:42:33,169 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:42:33,228 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:42:33,384 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:42:33,385 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 05:42:33,385 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 05:42:33,387 INFO ]: Interpolant automaton has 3 states [2018-06-22 05:42:33,397 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 05:42:33,397 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:42:33,399 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 05:42:33,460 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:42:33,460 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 05:42:33,461 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 05:42:33,462 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 05:42:33,462 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:42:33,470 INFO ]: With dead ends: 9 [2018-06-22 05:42:33,470 INFO ]: Without dead ends: 9 [2018-06-22 05:42:33,472 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:42:33,488 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 05:42:33,515 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 05:42:33,516 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 05:42:33,516 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 05:42:33,517 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 05:42:33,517 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:42:33,517 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 05:42:33,517 INFO ]: Interpolant automaton has 3 states. [2018-06-22 05:42:33,517 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 05:42:33,518 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 05:42:33,518 INFO ]: Found error trace [2018-06-22 05:42:33,518 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:42:33,518 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:42:33,518 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-22 05:42:33,518 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:42:33,518 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:42:33,519 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:42:33,519 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:42:33,519 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:42:33,624 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:42:33,795 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:42:33,796 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:42:33,796 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 05:42:33,808 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:42:33,924 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:42:33,933 INFO ]: Computing forward predicates... [2018-06-22 05:42:34,601 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:42:34,636 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:42:34,636 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 05:42:34,637 INFO ]: Interpolant automaton has 5 states [2018-06-22 05:42:34,637 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 05:42:34,637 INFO ]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-22 05:42:34,637 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 05:42:34,938 WARN ]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 05:42:35,014 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:42:35,014 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 05:42:35,014 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 05:42:35,014 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 05:42:35,014 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:42:35,014 INFO ]: With dead ends: 11 [2018-06-22 05:42:35,014 INFO ]: Without dead ends: 11 [2018-06-22 05:42:35,015 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:42:35,015 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 05:42:35,017 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 05:42:35,017 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 05:42:35,017 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 05:42:35,018 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-22 05:42:35,018 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:42:35,018 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 05:42:35,018 INFO ]: Interpolant automaton has 5 states. [2018-06-22 05:42:35,018 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 05:42:35,018 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 05:42:35,018 INFO ]: Found error trace [2018-06-22 05:42:35,018 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:42:35,018 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:42:35,018 INFO ]: Analyzing trace with hash 1062095287, now seen corresponding path program 2 times [2018-06-22 05:42:35,018 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:42:35,018 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:42:35,019 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:42:35,019 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:42:35,019 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:42:35,173 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:42:35,679 WARN ]: Spent 181.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 6 [2018-06-22 05:42:35,695 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:42:35,695 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:42:35,695 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 05:42:35,708 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 05:42:35,829 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:42:35,829 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:42:35,835 INFO ]: Computing forward predicates... [2018-06-22 05:42:36,350 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:42:38,801 WARN ]: Spent 526.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 11 [2018-06-22 05:42:48,186 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:42:48,206 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:42:48,206 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-22 05:42:48,206 INFO ]: Interpolant automaton has 7 states [2018-06-22 05:42:48,206 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 05:42:48,207 INFO ]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-06-22 05:42:48,207 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-06-22 05:42:48,295 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:42:48,296 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 05:42:48,296 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 05:42:48,296 INFO ]: Start accepts. Automaton has 7 states. Word has length 10 [2018-06-22 05:42:48,296 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:42:48,296 INFO ]: With dead ends: 12 [2018-06-22 05:42:48,296 INFO ]: Without dead ends: 12 [2018-06-22 05:42:48,297 INFO ]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2018-06-22 05:42:48,297 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 05:42:48,298 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 05:42:48,298 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 05:42:48,299 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 05:42:48,299 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-22 05:42:48,299 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:42:48,299 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 05:42:48,299 INFO ]: Interpolant automaton has 7 states. [2018-06-22 05:42:48,299 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 05:42:48,299 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 05:42:48,299 INFO ]: Found error trace [2018-06-22 05:42:48,299 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:42:48,299 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:42:48,299 INFO ]: Analyzing trace with hash -1433955954, now seen corresponding path program 3 times [2018-06-22 05:42:48,299 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:42:48,299 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:42:48,300 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:42:48,300 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:42:48,300 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:42:48,449 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:42:49,196 WARN ]: Spent 416.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 6 [2018-06-22 05:42:49,294 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:42:49,295 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:42:49,295 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 05:42:49,337 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 05:42:49,479 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 05:42:49,479 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:42:49,486 INFO ]: Computing forward predicates... [2018-06-22 05:43:07,877 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:43:07,897 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:43:07,897 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-06-22 05:43:07,897 INFO ]: Interpolant automaton has 8 states [2018-06-22 05:43:07,897 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 05:43:07,897 INFO ]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-06-22 05:43:07,898 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 8 states. [2018-06-22 05:43:08,131 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:43:08,131 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 05:43:08,131 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 05:43:08,131 INFO ]: Start accepts. Automaton has 8 states. Word has length 11 [2018-06-22 05:43:08,131 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:43:08,131 INFO ]: With dead ends: 13 [2018-06-22 05:43:08,131 INFO ]: Without dead ends: 13 [2018-06-22 05:43:08,132 INFO ]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2018-06-22 05:43:08,132 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 05:43:08,133 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 05:43:08,133 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 05:43:08,134 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 05:43:08,134 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-22 05:43:08,134 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:43:08,134 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 05:43:08,134 INFO ]: Interpolant automaton has 8 states. [2018-06-22 05:43:08,134 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 05:43:08,134 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 05:43:08,134 INFO ]: Found error trace [2018-06-22 05:43:08,134 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:43:08,134 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:43:08,135 INFO ]: Analyzing trace with hash -1502133097, now seen corresponding path program 4 times [2018-06-22 05:43:08,135 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:43:08,135 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:43:08,135 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:43:08,135 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:43:08,135 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:43:08,254 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:43:08,788 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:43:08,788 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:43:08,788 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 05:43:08,796 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 05:43:08,920 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 05:43:08,920 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:43:08,925 INFO ]: Computing forward predicates... [2018-06-22 05:43:09,836 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:43:09,928 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:43:09,939 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:43:10,005 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:43:10,014 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:43:10,040 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:43:13,273 WARN ]: Spent 141.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 22 [2018-06-22 05:43:17,011 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:43:17,112 WARN ]: expecting exponential blowup for input size 6 Received shutdown request... [2018-06-22 05:43:34,934 INFO ]: Timeout while computing interpolants [2018-06-22 05:43:35,134 WARN ]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:43:35,134 WARN ]: Verification canceled [2018-06-22 05:43:35,139 WARN ]: Timeout [2018-06-22 05:43:35,139 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 05:43:35 BoogieIcfgContainer [2018-06-22 05:43:35,139 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 05:43:35,140 INFO ]: Toolchain (without parser) took 62676.67 ms. Allocated memory was 305.7 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 245.1 MB in the beginning and 278.7 MB in the end (delta: -33.6 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 05:43:35,140 INFO ]: SmtParser took 0.10 ms. Allocated memory is still 305.7 MB. Free memory is still 271.2 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 05:43:35,141 INFO ]: ChcToBoogie took 66.58 ms. Allocated memory is still 305.7 MB. Free memory was 244.1 MB in the beginning and 240.1 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:43:35,141 INFO ]: Boogie Preprocessor took 79.82 ms. Allocated memory is still 305.7 MB. Free memory was 240.1 MB in the beginning and 238.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:43:35,142 INFO ]: RCFGBuilder took 393.42 ms. Allocated memory is still 305.7 MB. Free memory was 238.1 MB in the beginning and 219.9 MB in the end (delta: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 3.6 GB. [2018-06-22 05:43:35,142 INFO ]: TraceAbstraction took 62126.67 ms. Allocated memory was 305.7 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 218.9 MB in the beginning and 278.7 MB in the end (delta: -59.8 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 05:43:35,145 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.10 ms. Allocated memory is still 305.7 MB. Free memory is still 271.2 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 66.58 ms. Allocated memory is still 305.7 MB. Free memory was 244.1 MB in the beginning and 240.1 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 79.82 ms. Allocated memory is still 305.7 MB. Free memory was 240.1 MB in the beginning and 238.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 393.42 ms. Allocated memory is still 305.7 MB. Free memory was 238.1 MB in the beginning and 219.9 MB in the end (delta: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 3.6 GB. * TraceAbstraction took 62126.67 ms. Allocated memory was 305.7 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 218.9 MB in the beginning and 278.7 MB in the end (delta: -59.8 MB). Peak memory consumption was 1.3 GB. 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 analyzing trace of length 13 with TraceHistMax 5, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while XnfDer was eliminating 9915 quantified variables from 14 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 62.0s OverallTime, 5 OverallIterations, 5 TraceHistogramMax, 0.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 28 SDtfs, 5 SDslu, 60 SDs, 0 SdLazy, 26 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=4, 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 33.1s InterpolantComputationTime, 65 NumberOfCodeBlocks, 65 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 58 ConstructedInterpolants, 0 QuantifiedInterpolants, 1824 SizeOfPredicates, 18 NumberOfNonLiveVariables, 958 ConjunctsInSsa, 94 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/34 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/nest-if6.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_05-43-35-157.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nest-if6.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_05-43-35-157.csv Completed graceful shutdown