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/nested7.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 05:37:37,998 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 05:37:38,000 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 05:37:38,013 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 05:37:38,013 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 05:37:38,014 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 05:37:38,015 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 05:37:38,017 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 05:37:38,019 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 05:37:38,020 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 05:37:38,020 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 05:37:38,021 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 05:37:38,021 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 05:37:38,023 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 05:37:38,023 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 05:37:38,024 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 05:37:38,026 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 05:37:38,033 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 05:37:38,035 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 05:37:38,036 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 05:37:38,037 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 05:37:38,047 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 05:37:38,047 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 05:37:38,047 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 05:37:38,048 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 05:37:38,049 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 05:37:38,050 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 05:37:38,050 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 05:37:38,054 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 05:37:38,054 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 05:37:38,055 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 05:37:38,055 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 05:37:38,056 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 05:37:38,056 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 05:37:38,057 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 05:37:38,057 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 05:37:38,073 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 05:37:38,074 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 05:37:38,074 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 05:37:38,074 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 05:37:38,075 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 05:37:38,075 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 05:37:38,075 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 05:37:38,076 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 05:37:38,076 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:37:38,076 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 05:37:38,076 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 05:37:38,076 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 05:37:38,077 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 05:37:38,077 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 05:37:38,079 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 05:37:38,079 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 05:37:38,079 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 05:37:38,081 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 05:37:38,081 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 05:37:38,127 INFO ]: Repository-Root is: /tmp [2018-06-22 05:37:38,143 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 05:37:38,148 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 05:37:38,150 INFO ]: Initializing SmtParser... [2018-06-22 05:37:38,150 INFO ]: SmtParser initialized [2018-06-22 05:37:38,150 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested7.c.smt2 [2018-06-22 05:37:38,152 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 05:37:38,298 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested7.c.smt2 unknown [2018-06-22 05:37:38,804 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested7.c.smt2 [2018-06-22 05:37:38,826 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 05:37:38,834 INFO ]: Walking toolchain with 4 elements. [2018-06-22 05:37:38,835 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 05:37:38,835 INFO ]: Initializing ChcToBoogie... [2018-06-22 05:37:38,835 INFO ]: ChcToBoogie initialized [2018-06-22 05:37:38,926 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:37:38" (1/1) ... [2018-06-22 05:37:39,000 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:37:39 Unit [2018-06-22 05:37:39,001 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 05:37:39,001 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 05:37:39,001 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 05:37:39,001 INFO ]: Boogie Preprocessor initialized [2018-06-22 05:37:39,022 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:37:39" (1/1) ... [2018-06-22 05:37:39,022 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:37:39" (1/1) ... [2018-06-22 05:37:39,039 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:37:39" (1/1) ... [2018-06-22 05:37:39,040 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:37:39" (1/1) ... [2018-06-22 05:37:39,054 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:37:39" (1/1) ... [2018-06-22 05:37:39,056 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:37:39" (1/1) ... [2018-06-22 05:37:39,058 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:37:39" (1/1) ... [2018-06-22 05:37:39,061 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 05:37:39,061 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 05:37:39,061 INFO ]: Initializing RCFGBuilder... [2018-06-22 05:37:39,061 INFO ]: RCFGBuilder initialized [2018-06-22 05:37:39,070 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:37:39" (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 05:37:39,080 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 05:37:39,081 INFO ]: Found specification of procedure gotoProc [2018-06-22 05:37:39,081 INFO ]: Found implementation of procedure gotoProc [2018-06-22 05:37:39,081 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 05:37:39,081 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 05:37:39,081 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 05:37:39,398 INFO ]: Using library mode [2018-06-22 05:37:39,398 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:37:39 BoogieIcfgContainer [2018-06-22 05:37:39,398 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 05:37:39,402 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 05:37:39,402 INFO ]: Initializing TraceAbstraction... [2018-06-22 05:37:39,405 INFO ]: TraceAbstraction initialized [2018-06-22 05:37:39,406 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:37:38" (1/3) ... [2018-06-22 05:37:39,409 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62f47905 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:37:39, skipping insertion in model container [2018-06-22 05:37:39,409 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:37:39" (2/3) ... [2018-06-22 05:37:39,409 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62f47905 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:37:39, skipping insertion in model container [2018-06-22 05:37:39,409 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:37:39" (3/3) ... [2018-06-22 05:37:39,411 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 05:37:39,420 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 05:37:39,428 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 05:37:39,716 INFO ]: Using default assertion order modulation [2018-06-22 05:37:39,716 INFO ]: Interprodecural is true [2018-06-22 05:37:39,717 INFO ]: Hoare is false [2018-06-22 05:37:39,717 INFO ]: Compute interpolants for FPandBP [2018-06-22 05:37:39,717 INFO ]: Backedges is TWOTRACK [2018-06-22 05:37:39,717 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 05:37:39,717 INFO ]: Difference is false [2018-06-22 05:37:39,717 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 05:37:39,717 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 05:37:39,764 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 05:37:39,895 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 05:37:39,895 INFO ]: Found error trace [2018-06-22 05:37:39,896 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:37:39,897 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:37:39,900 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-22 05:37:39,901 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:37:39,926 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:37:40,111 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:37:40,111 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:37:40,111 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:37:40,260 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:37:40,337 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:37:40,339 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 05:37:40,339 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 05:37:40,340 INFO ]: Interpolant automaton has 3 states [2018-06-22 05:37:40,373 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 05:37:40,374 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:37:40,376 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 05:37:40,461 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:37:40,461 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 05:37:40,462 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 05:37:40,463 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 05:37:40,464 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:37:40,470 INFO ]: With dead ends: 9 [2018-06-22 05:37:40,470 INFO ]: Without dead ends: 9 [2018-06-22 05:37:40,472 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 05:37:40,485 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 05:37:40,502 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 05:37:40,503 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 05:37:40,504 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 05:37:40,505 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 05:37:40,505 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:37:40,505 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 05:37:40,505 INFO ]: Interpolant automaton has 3 states. [2018-06-22 05:37:40,505 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 05:37:40,506 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 05:37:40,506 INFO ]: Found error trace [2018-06-22 05:37:40,506 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:37:40,506 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:37:40,506 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-22 05:37:40,506 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:37:40,506 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:37:40,507 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:37:40,507 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:37:40,507 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:37:40,588 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:37:40,750 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:37:40,750 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:37:40,750 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 05:37:40,758 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:37:40,826 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:37:40,837 INFO ]: Computing forward predicates... [2018-06-22 05:37:43,570 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:37:43,590 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:37:43,590 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 05:37:43,591 INFO ]: Interpolant automaton has 5 states [2018-06-22 05:37:43,591 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 05:37:43,591 INFO ]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-22 05:37:43,591 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 05:37:43,623 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:37:43,623 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 05:37:43,623 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 05:37:43,624 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 05:37:43,624 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:37:43,624 INFO ]: With dead ends: 10 [2018-06-22 05:37:43,624 INFO ]: Without dead ends: 10 [2018-06-22 05:37:43,625 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:37:43,625 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 05:37:43,626 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 05:37:43,626 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 05:37:43,626 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 05:37:43,626 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 05:37:43,626 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:37:43,626 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 05:37:43,626 INFO ]: Interpolant automaton has 5 states. [2018-06-22 05:37:43,626 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 05:37:43,626 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 05:37:43,626 INFO ]: Found error trace [2018-06-22 05:37:43,627 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:37:43,627 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:37:43,627 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-22 05:37:43,627 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:37:43,627 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:37:43,628 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:37:43,628 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:37:43,628 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:37:43,701 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:37:43,923 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:37:43,923 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:37:43,923 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 05:37:43,930 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 05:37:44,006 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:37:44,006 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:37:44,009 INFO ]: Computing forward predicates... [2018-06-22 05:37:48,234 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:37:48,254 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:37:48,275 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-22 05:37:48,275 INFO ]: Interpolant automaton has 6 states [2018-06-22 05:37:48,275 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 05:37:48,275 INFO ]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:37:48,275 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-22 05:37:48,341 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:37:48,342 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 05:37:48,342 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 05:37:48,342 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-22 05:37:48,342 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:37:48,342 INFO ]: With dead ends: 11 [2018-06-22 05:37:48,342 INFO ]: Without dead ends: 11 [2018-06-22 05:37:48,342 INFO ]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-06-22 05:37:48,342 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 05:37:48,343 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 05:37:48,343 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 05:37:48,344 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 05:37:48,344 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-22 05:37:48,344 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:37:48,344 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 05:37:48,344 INFO ]: Interpolant automaton has 6 states. [2018-06-22 05:37:48,344 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 05:37:48,344 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 05:37:48,344 INFO ]: Found error trace [2018-06-22 05:37:48,344 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:37:48,344 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:37:48,345 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 3 times [2018-06-22 05:37:48,345 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:37:48,345 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:37:48,345 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:37:48,345 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:37:48,345 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:37:48,423 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:37:48,675 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:37:48,675 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:37:48,675 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 05:37:48,691 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 05:37:48,742 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 05:37:48,742 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:37:48,745 INFO ]: Computing forward predicates... [2018-06-22 05:38:20,526 WARN ]: Spent 154.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 8 [2018-06-22 05:38:20,642 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:38:23,007 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:38:23,044 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:38:23,044 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-22 05:38:23,045 INFO ]: Interpolant automaton has 8 states [2018-06-22 05:38:23,045 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 05:38:23,045 INFO ]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-06-22 05:38:23,045 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 8 states. [2018-06-22 05:38:23,180 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:38:23,180 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 05:38:23,180 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 05:38:23,180 INFO ]: Start accepts. Automaton has 8 states. Word has length 10 [2018-06-22 05:38:23,180 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:38:23,180 INFO ]: With dead ends: 12 [2018-06-22 05:38:23,180 INFO ]: Without dead ends: 12 [2018-06-22 05:38:23,181 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-06-22 05:38:23,181 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 05:38:23,183 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 05:38:23,183 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 05:38:23,183 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 05:38:23,183 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-22 05:38:23,183 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:38:23,183 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 05:38:23,183 INFO ]: Interpolant automaton has 8 states. [2018-06-22 05:38:23,183 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 05:38:23,184 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 05:38:23,184 INFO ]: Found error trace [2018-06-22 05:38:23,184 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:38:23,184 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:38:23,184 INFO ]: Analyzing trace with hash 201204236, now seen corresponding path program 4 times [2018-06-22 05:38:23,184 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:38:23,184 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:38:23,185 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:38:23,185 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:38:23,185 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:38:23,267 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:38:24,109 WARN ]: Spent 521.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-06-22 05:38:24,231 WARN ]: Spent 113.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2018-06-22 05:38:24,297 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:38:24,297 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:38:24,297 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 05:38:24,303 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 05:38:24,384 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 05:38:24,384 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:38:24,390 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-22 05:38:44,220 INFO ]: Timeout while computing interpolants [2018-06-22 05:38:44,420 WARN ]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:38:44,421 WARN ]: Verification canceled [2018-06-22 05:38:44,517 WARN ]: Timeout [2018-06-22 05:38:44,517 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 05:38:44 BoogieIcfgContainer [2018-06-22 05:38:44,517 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 05:38:44,518 INFO ]: Toolchain (without parser) took 65691.53 ms. Allocated memory was 306.2 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 250.8 MB in the beginning and 514.8 MB in the end (delta: -264.1 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 05:38:44,519 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 306.2 MB. Free memory is still 270.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 05:38:44,519 INFO ]: ChcToBoogie took 166.38 ms. Allocated memory is still 306.2 MB. Free memory was 250.8 MB in the beginning and 248.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:38:44,519 INFO ]: Boogie Preprocessor took 59.33 ms. Allocated memory is still 306.2 MB. Free memory was 248.8 MB in the beginning and 246.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:38:44,520 INFO ]: RCFGBuilder took 337.39 ms. Allocated memory is still 306.2 MB. Free memory was 246.8 MB in the beginning and 232.8 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:38:44,520 INFO ]: TraceAbstraction took 65114.86 ms. Allocated memory was 306.2 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 232.8 MB in the beginning and 514.8 MB in the end (delta: -282.1 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 05:38:44,524 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 306.2 MB. Free memory is still 270.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 166.38 ms. Allocated memory is still 306.2 MB. Free memory was 250.8 MB in the beginning and 248.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 59.33 ms. Allocated memory is still 306.2 MB. Free memory was 248.8 MB in the beginning and 246.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 337.39 ms. Allocated memory is still 306.2 MB. Free memory was 246.8 MB in the beginning and 232.8 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 65114.86 ms. Allocated memory was 306.2 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 232.8 MB in the beginning and 514.8 MB in the end (delta: -282.1 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 12 with TraceHistMax 4, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 24 quantified variables from 22 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 64.8s OverallTime, 5 OverallIterations, 4 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 28 SDtfs, 4 SDslu, 50 SDs, 0 SdLazy, 23 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred 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, 0.4s SatisfiabilityAnalysisTime, 41.9s InterpolantComputationTime, 61 NumberOfCodeBlocks, 61 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 1155 SizeOfPredicates, 18 NumberOfNonLiveVariables, 621 ConjunctsInSsa, 80 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/20 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/nested7.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_05-38-44-548.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nested7.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_05-38-44-548.csv Completed graceful shutdown