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/dillig37.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 05:20:24,361 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 05:20:24,363 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 05:20:24,375 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 05:20:24,375 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 05:20:24,376 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 05:20:24,378 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 05:20:24,383 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 05:20:24,385 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 05:20:24,387 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 05:20:24,388 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 05:20:24,388 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 05:20:24,389 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 05:20:24,390 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 05:20:24,395 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 05:20:24,396 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 05:20:24,399 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 05:20:24,401 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 05:20:24,410 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 05:20:24,411 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 05:20:24,412 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 05:20:24,415 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 05:20:24,416 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 05:20:24,416 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 05:20:24,417 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 05:20:24,418 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 05:20:24,420 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 05:20:24,420 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 05:20:24,422 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 05:20:24,422 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 05:20:24,422 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 05:20:24,425 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 05:20:24,426 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 05:20:24,426 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 05:20:24,427 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 05:20:24,427 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 05:20:24,441 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 05:20:24,441 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 05:20:24,441 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 05:20:24,441 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 05:20:24,442 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 05:20:24,442 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 05:20:24,442 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 05:20:24,442 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 05:20:24,442 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:20:24,443 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 05:20:24,443 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 05:20:24,443 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 05:20:24,443 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 05:20:24,443 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 05:20:24,444 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 05:20:24,444 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 05:20:24,444 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 05:20:24,445 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 05:20:24,446 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 05:20:24,497 INFO ]: Repository-Root is: /tmp [2018-06-22 05:20:24,517 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 05:20:24,521 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 05:20:24,523 INFO ]: Initializing SmtParser... [2018-06-22 05:20:24,523 INFO ]: SmtParser initialized [2018-06-22 05:20:24,524 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig37.c.smt2 [2018-06-22 05:20:24,525 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 05:20:24,620 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig37.c.smt2 unknown [2018-06-22 05:20:24,977 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig37.c.smt2 [2018-06-22 05:20:24,981 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 05:20:24,991 INFO ]: Walking toolchain with 4 elements. [2018-06-22 05:20:24,991 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 05:20:24,991 INFO ]: Initializing ChcToBoogie... [2018-06-22 05:20:24,991 INFO ]: ChcToBoogie initialized [2018-06-22 05:20:24,995 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:20:24" (1/1) ... [2018-06-22 05:20:25,060 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:20:25 Unit [2018-06-22 05:20:25,060 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 05:20:25,061 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 05:20:25,061 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 05:20:25,061 INFO ]: Boogie Preprocessor initialized [2018-06-22 05:20:25,084 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:20:25" (1/1) ... [2018-06-22 05:20:25,084 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:20:25" (1/1) ... [2018-06-22 05:20:25,092 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:20:25" (1/1) ... [2018-06-22 05:20:25,093 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:20:25" (1/1) ... [2018-06-22 05:20:25,098 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:20:25" (1/1) ... [2018-06-22 05:20:25,100 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:20:25" (1/1) ... [2018-06-22 05:20:25,101 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:20:25" (1/1) ... [2018-06-22 05:20:25,108 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 05:20:25,108 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 05:20:25,108 INFO ]: Initializing RCFGBuilder... [2018-06-22 05:20:25,108 INFO ]: RCFGBuilder initialized [2018-06-22 05:20:25,110 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:20:25" (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 05:20:25,135 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 05:20:25,135 INFO ]: Found specification of procedure gotoProc [2018-06-22 05:20:25,135 INFO ]: Found implementation of procedure gotoProc [2018-06-22 05:20:25,135 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 05:20:25,135 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 05:20:25,135 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 05:20:25,332 INFO ]: Using library mode [2018-06-22 05:20:25,332 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:20:25 BoogieIcfgContainer [2018-06-22 05:20:25,332 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 05:20:25,333 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 05:20:25,334 INFO ]: Initializing TraceAbstraction... [2018-06-22 05:20:25,337 INFO ]: TraceAbstraction initialized [2018-06-22 05:20:25,337 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:20:24" (1/3) ... [2018-06-22 05:20:25,338 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@726e362a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:20:25, skipping insertion in model container [2018-06-22 05:20:25,338 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:20:25" (2/3) ... [2018-06-22 05:20:25,338 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@726e362a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:20:25, skipping insertion in model container [2018-06-22 05:20:25,338 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:20:25" (3/3) ... [2018-06-22 05:20:25,340 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 05:20:25,349 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 05:20:25,359 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 05:20:25,406 INFO ]: Using default assertion order modulation [2018-06-22 05:20:25,407 INFO ]: Interprodecural is true [2018-06-22 05:20:25,407 INFO ]: Hoare is false [2018-06-22 05:20:25,407 INFO ]: Compute interpolants for FPandBP [2018-06-22 05:20:25,407 INFO ]: Backedges is TWOTRACK [2018-06-22 05:20:25,407 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 05:20:25,407 INFO ]: Difference is false [2018-06-22 05:20:25,407 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 05:20:25,407 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 05:20:25,421 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 05:20:25,431 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 05:20:25,431 INFO ]: Found error trace [2018-06-22 05:20:25,432 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:20:25,432 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:20:25,438 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-22 05:20:25,440 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:20:25,441 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:20:25,478 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:20:25,478 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:20:25,478 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:20:25,525 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:20:25,648 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:20:25,652 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 05:20:25,653 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 05:20:25,655 INFO ]: Interpolant automaton has 3 states [2018-06-22 05:20:25,672 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 05:20:25,673 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:20:25,676 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 05:20:25,756 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:20:25,757 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 05:20:25,759 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 05:20:25,760 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 05:20:25,761 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:20:25,770 INFO ]: With dead ends: 9 [2018-06-22 05:20:25,770 INFO ]: Without dead ends: 9 [2018-06-22 05:20:25,772 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 05:20:25,786 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 05:20:25,801 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 05:20:25,802 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 05:20:25,803 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 05:20:25,804 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 05:20:25,804 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:20:25,804 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 05:20:25,804 INFO ]: Interpolant automaton has 3 states. [2018-06-22 05:20:25,805 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 05:20:25,805 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 05:20:25,805 INFO ]: Found error trace [2018-06-22 05:20:25,805 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:20:25,805 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:20:25,805 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-22 05:20:25,805 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:20:25,805 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:20:25,806 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:20:25,806 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:20:25,806 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:20:25,835 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:20:26,054 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:20:26,054 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:20:26,054 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 05:20:26,061 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:20:26,106 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:20:26,117 INFO ]: Computing forward predicates... [2018-06-22 05:20:26,546 WARN ]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 05:20:26,806 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:20:26,842 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:20:26,842 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 05:20:26,843 INFO ]: Interpolant automaton has 5 states [2018-06-22 05:20:26,843 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 05:20:26,843 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-22 05:20:26,843 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 05:20:26,967 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:20:26,967 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 05:20:26,967 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 05:20:26,967 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 05:20:26,967 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:20:26,968 INFO ]: With dead ends: 10 [2018-06-22 05:20:26,968 INFO ]: Without dead ends: 10 [2018-06-22 05:20:26,969 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:20:26,969 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 05:20:26,970 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 05:20:26,970 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 05:20:26,970 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 05:20:26,971 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 05:20:26,971 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:20:26,971 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 05:20:26,971 INFO ]: Interpolant automaton has 5 states. [2018-06-22 05:20:26,971 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 05:20:26,971 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 05:20:26,971 INFO ]: Found error trace [2018-06-22 05:20:26,971 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:20:26,971 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:20:26,971 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-22 05:20:26,972 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:20:26,972 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:20:26,973 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:20:26,973 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:20:26,973 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:20:27,027 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:20:27,284 WARN ]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 05:20:27,399 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:20:27,400 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:20:27,400 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 05:20:27,406 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 05:20:27,477 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:20:27,477 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:20:27,481 INFO ]: Computing forward predicates... [2018-06-22 05:20:28,637 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:20:28,671 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:20:28,671 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-22 05:20:28,671 INFO ]: Interpolant automaton has 6 states [2018-06-22 05:20:28,671 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 05:20:28,671 INFO ]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:20:28,672 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-22 05:20:28,984 WARN ]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-06-22 05:20:29,122 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:20:29,122 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 05:20:29,123 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 05:20:29,123 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-22 05:20:29,123 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:20:29,123 INFO ]: With dead ends: 11 [2018-06-22 05:20:29,123 INFO ]: Without dead ends: 11 [2018-06-22 05:20:29,124 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2018-06-22 05:20:29,124 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 05:20:29,125 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 05:20:29,125 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 05:20:29,125 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 05:20:29,125 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-22 05:20:29,125 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:20:29,125 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 05:20:29,125 INFO ]: Interpolant automaton has 6 states. [2018-06-22 05:20:29,126 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 05:20:29,126 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 05:20:29,126 INFO ]: Found error trace [2018-06-22 05:20:29,126 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:20:29,126 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:20:29,126 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 3 times [2018-06-22 05:20:29,126 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:20:29,127 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:20:29,128 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:20:29,128 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:20:29,128 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:20:29,167 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:20:29,447 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:20:29,447 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:20:29,447 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 05:20:29,465 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 05:20:29,522 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 05:20:29,522 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:20:29,525 INFO ]: Computing forward predicates... [2018-06-22 05:20:32,069 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:20:32,117 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:20:36,531 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:20:36,566 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:20:36,566 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-22 05:20:36,567 INFO ]: Interpolant automaton has 7 states [2018-06-22 05:20:36,567 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 05:20:36,567 INFO ]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-06-22 05:20:36,567 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-06-22 05:20:36,734 WARN ]: Spent 100.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 18 [2018-06-22 05:20:36,878 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:20:36,878 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 05:20:36,878 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 05:20:36,878 INFO ]: Start accepts. Automaton has 7 states. Word has length 10 [2018-06-22 05:20:36,878 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:20:36,878 INFO ]: With dead ends: 12 [2018-06-22 05:20:36,878 INFO ]: Without dead ends: 12 [2018-06-22 05:20:36,879 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2018-06-22 05:20:36,879 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 05:20:36,880 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 05:20:36,880 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 05:20:36,880 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 05:20:36,880 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-22 05:20:36,880 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:20:36,880 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 05:20:36,880 INFO ]: Interpolant automaton has 7 states. [2018-06-22 05:20:36,880 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 05:20:36,880 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 05:20:36,880 INFO ]: Found error trace [2018-06-22 05:20:36,880 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:20:36,880 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:20:36,880 INFO ]: Analyzing trace with hash 201204236, now seen corresponding path program 4 times [2018-06-22 05:20:36,880 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:20:36,880 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:20:36,881 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:20:36,881 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:20:36,881 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:20:36,926 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:20:37,211 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:20:37,211 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:20:37,211 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 05:20:37,217 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 05:20:37,247 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 05:20:37,248 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:20:37,251 INFO ]: Computing forward predicates... [2018-06-22 05:20:40,126 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:20:40,145 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:20:40,261 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:20:40,346 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:20:40,481 WARN ]: expecting exponential blowup for input size 6 Received shutdown request... [2018-06-22 05:21:32,853 INFO ]: Timeout while computing interpolants [2018-06-22 05:21:33,053 WARN ]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:21:33,053 WARN ]: Verification canceled [2018-06-22 05:21:33,057 WARN ]: Timeout [2018-06-22 05:21:33,057 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 05:21:33 BoogieIcfgContainer [2018-06-22 05:21:33,057 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 05:21:33,057 INFO ]: Toolchain (without parser) took 68075.45 ms. Allocated memory was 307.2 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 258.6 MB in the beginning and 371.5 MB in the end (delta: -112.9 MB). Peak memory consumption was 1.1 GB. Max. memory is 3.6 GB. [2018-06-22 05:21:33,058 INFO ]: SmtParser took 0.14 ms. Allocated memory is still 307.2 MB. Free memory is still 270.7 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 05:21:33,058 INFO ]: ChcToBoogie took 69.02 ms. Allocated memory is still 307.2 MB. Free memory was 258.6 MB in the beginning and 256.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:21:33,061 INFO ]: Boogie Preprocessor took 47.09 ms. Allocated memory is still 307.2 MB. Free memory was 256.6 MB in the beginning and 254.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:21:33,062 INFO ]: RCFGBuilder took 224.00 ms. Allocated memory is still 307.2 MB. Free memory was 254.6 MB in the beginning and 245.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:21:33,062 INFO ]: TraceAbstraction took 67723.33 ms. Allocated memory was 307.2 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 244.6 MB in the beginning and 371.5 MB in the end (delta: -126.9 MB). Peak memory consumption was 1.1 GB. Max. memory is 3.6 GB. [2018-06-22 05:21:33,071 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.14 ms. Allocated memory is still 307.2 MB. Free memory is still 270.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 69.02 ms. Allocated memory is still 307.2 MB. Free memory was 258.6 MB in the beginning and 256.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 47.09 ms. Allocated memory is still 307.2 MB. Free memory was 256.6 MB in the beginning and 254.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 224.00 ms. Allocated memory is still 307.2 MB. Free memory was 254.6 MB in the beginning and 245.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 67723.33 ms. Allocated memory was 307.2 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 244.6 MB in the beginning and 371.5 MB in the end (delta: -126.9 MB). Peak memory consumption was 1.1 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 PredicateComparison was comparing new predicate (quantifier-free) to 8 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 67.6s OverallTime, 5 OverallIterations, 4 TraceHistogramMax, 1.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 28 SDtfs, 4 SDslu, 61 SDs, 0 SdLazy, 26 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.0s 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, 0.2s SatisfiabilityAnalysisTime, 9.8s InterpolantComputationTime, 61 NumberOfCodeBlocks, 61 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 1646 SizeOfPredicates, 15 NumberOfNonLiveVariables, 315 ConjunctsInSsa, 68 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/dillig37.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_05-21-33-084.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/dillig37.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_05-21-33-084.csv Completed graceful shutdown