java -Xss4m -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/up2.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 13:41:22,333 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 13:41:22,336 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 13:41:22,349 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 13:41:22,349 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 13:41:22,350 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 13:41:22,353 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 13:41:22,355 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 13:41:22,357 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 13:41:22,357 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 13:41:22,359 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 13:41:22,359 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 13:41:22,360 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 13:41:22,361 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 13:41:22,363 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 13:41:22,364 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 13:41:22,366 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 13:41:22,375 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 13:41:22,377 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 13:41:22,377 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 13:41:22,378 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 13:41:22,383 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 13:41:22,383 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 13:41:22,383 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 13:41:22,384 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 13:41:22,385 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 13:41:22,385 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 13:41:22,387 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 13:41:22,388 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 13:41:22,388 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 13:41:22,389 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 13:41:22,390 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 13:41:22,390 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 13:41:22,390 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 13:41:22,396 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 13:41:22,396 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 13:41:22,417 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 13:41:22,419 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 13:41:22,420 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 13:41:22,420 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 13:41:22,421 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 13:41:22,421 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 13:41:22,421 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 13:41:22,421 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 13:41:22,421 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 13:41:22,422 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 13:41:22,422 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 13:41:22,422 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 13:41:22,422 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 13:41:22,422 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 13:41:22,423 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 13:41:22,425 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 13:41:22,425 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 13:41:22,426 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 13:41:22,426 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 13:41:22,426 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 13:41:22,426 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 13:41:22,427 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 13:41:22,428 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 13:41:22,471 INFO ]: Repository-Root is: /tmp [2018-06-25 13:41:22,490 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 13:41:22,496 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 13:41:22,498 INFO ]: Initializing SmtParser... [2018-06-25 13:41:22,498 INFO ]: SmtParser initialized [2018-06-25 13:41:22,499 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/up2.c.smt2 [2018-06-25 13:41:22,500 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 [2018-06-25 13:41:22,594 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/up2.c.smt2 unknown [2018-06-25 13:41:22,804 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/up2.c.smt2 [2018-06-25 13:41:22,808 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 13:41:22,817 INFO ]: Walking toolchain with 4 elements. [2018-06-25 13:41:22,818 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 13:41:22,818 INFO ]: Initializing ChcToBoogie... [2018-06-25 13:41:22,818 INFO ]: ChcToBoogie initialized [2018-06-25 13:41:22,821 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:41:22" (1/1) ... [2018-06-25 13:41:22,885 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:41:22 Unit [2018-06-25 13:41:22,885 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 13:41:22,885 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 13:41:22,885 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 13:41:22,886 INFO ]: Boogie Preprocessor initialized [2018-06-25 13:41:22,909 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:41:22" (1/1) ... [2018-06-25 13:41:22,910 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:41:22" (1/1) ... [2018-06-25 13:41:22,919 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:41:22" (1/1) ... [2018-06-25 13:41:22,919 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:41:22" (1/1) ... [2018-06-25 13:41:22,932 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:41:22" (1/1) ... [2018-06-25 13:41:22,934 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:41:22" (1/1) ... [2018-06-25 13:41:22,936 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:41:22" (1/1) ... [2018-06-25 13:41:22,937 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 13:41:22,938 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 13:41:22,938 INFO ]: Initializing RCFGBuilder... [2018-06-25 13:41:22,938 INFO ]: RCFGBuilder initialized [2018-06-25 13:41:22,939 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:41:22" (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) [2018-06-25 13:41:22,967 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 13:41:22,967 INFO ]: Found specification of procedure gotoProc [2018-06-25 13:41:22,967 INFO ]: Found implementation of procedure gotoProc [2018-06-25 13:41:22,967 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 13:41:22,967 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 13:41:22,967 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 [2018-06-25 13:41:23,140 INFO ]: Using library mode [2018-06-25 13:41:23,141 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:41:23 BoogieIcfgContainer [2018-06-25 13:41:23,141 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 13:41:23,142 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 13:41:23,142 INFO ]: Initializing TraceAbstraction... [2018-06-25 13:41:23,147 INFO ]: TraceAbstraction initialized [2018-06-25 13:41:23,147 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:41:22" (1/3) ... [2018-06-25 13:41:23,148 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b58df6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 01:41:23, skipping insertion in model container [2018-06-25 13:41:23,148 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:41:22" (2/3) ... [2018-06-25 13:41:23,148 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b58df6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 01:41:23, skipping insertion in model container [2018-06-25 13:41:23,148 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:41:23" (3/3) ... [2018-06-25 13:41:23,150 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 13:41:23,159 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 13:41:23,167 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 13:41:23,214 INFO ]: Using default assertion order modulation [2018-06-25 13:41:23,214 INFO ]: Interprodecural is true [2018-06-25 13:41:23,214 INFO ]: Hoare is false [2018-06-25 13:41:23,214 INFO ]: Compute interpolants for FPandBP [2018-06-25 13:41:23,214 INFO ]: Backedges is TWOTRACK [2018-06-25 13:41:23,214 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 13:41:23,214 INFO ]: Difference is false [2018-06-25 13:41:23,214 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 13:41:23,214 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 13:41:23,225 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 13:41:23,235 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 13:41:23,235 INFO ]: Found error trace [2018-06-25 13:41:23,236 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:41:23,236 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:41:23,242 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-25 13:41:23,244 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:41:23,244 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:41:23,276 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:41:23,276 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:41:23,276 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:41:23,313 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:41:23,369 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:41:23,371 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 13:41:23,371 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 13:41:23,372 INFO ]: Interpolant automaton has 3 states [2018-06-25 13:41:23,382 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 13:41:23,383 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 13:41:23,385 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 13:41:23,449 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:41:23,449 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 13:41:23,450 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 13:41:23,452 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 13:41:23,452 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:41:23,464 INFO ]: With dead ends: 9 [2018-06-25 13:41:23,464 INFO ]: Without dead ends: 9 [2018-06-25 13:41:23,466 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 [2018-06-25 13:41:23,489 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 13:41:23,504 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 13:41:23,505 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 13:41:23,505 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 13:41:23,506 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 13:41:23,507 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:41:23,507 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 13:41:23,507 INFO ]: Interpolant automaton has 3 states. [2018-06-25 13:41:23,507 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 13:41:23,507 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 13:41:23,507 INFO ]: Found error trace [2018-06-25 13:41:23,507 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:41:23,507 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:41:23,507 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-25 13:41:23,507 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:41:23,507 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:41:23,508 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:41:23,508 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:41:23,508 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:41:23,532 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:41:23,708 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:41:23,708 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:41:23,708 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 [2018-06-25 13:41:23,715 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:41:23,765 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:41:23,775 INFO ]: Computing forward predicates... [2018-06-25 13:41:23,861 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:41:23,884 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:41:23,884 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 13:41:23,885 INFO ]: Interpolant automaton has 5 states [2018-06-25 13:41:23,885 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 13:41:23,885 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-25 13:41:23,885 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-25 13:41:23,977 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:41:23,977 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-25 13:41:23,981 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-25 13:41:23,981 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-25 13:41:23,981 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:41:23,981 INFO ]: With dead ends: 10 [2018-06-25 13:41:23,981 INFO ]: Without dead ends: 10 [2018-06-25 13:41:23,982 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-25 13:41:23,982 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-25 13:41:23,983 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-25 13:41:23,984 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-25 13:41:23,984 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-25 13:41:23,984 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-25 13:41:23,984 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:41:23,984 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-25 13:41:23,984 INFO ]: Interpolant automaton has 5 states. [2018-06-25 13:41:23,984 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-25 13:41:23,984 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-25 13:41:23,984 INFO ]: Found error trace [2018-06-25 13:41:23,985 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:41:23,985 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:41:23,985 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-25 13:41:23,985 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:41:23,985 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:41:23,986 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:41:23,986 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:41:23,986 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:41:24,061 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:41:24,375 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:41:24,375 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:41:24,375 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 [2018-06-25 13:41:24,384 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 13:41:24,449 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 13:41:24,449 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:41:24,452 INFO ]: Computing forward predicates... [2018-06-25 13:41:25,110 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:41:25,130 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:41:25,130 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-25 13:41:25,130 INFO ]: Interpolant automaton has 6 states [2018-06-25 13:41:25,130 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 13:41:25,130 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-25 13:41:25,131 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-25 13:41:25,187 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:41:25,187 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-25 13:41:25,188 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-25 13:41:25,188 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-25 13:41:25,188 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:41:25,188 INFO ]: With dead ends: 11 [2018-06-25 13:41:25,188 INFO ]: Without dead ends: 11 [2018-06-25 13:41:25,189 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-06-25 13:41:25,189 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-25 13:41:25,190 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-25 13:41:25,190 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-25 13:41:25,190 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-25 13:41:25,190 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-25 13:41:25,190 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:41:25,190 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-25 13:41:25,190 INFO ]: Interpolant automaton has 6 states. [2018-06-25 13:41:25,190 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-25 13:41:25,191 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-25 13:41:25,191 INFO ]: Found error trace [2018-06-25 13:41:25,191 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:41:25,191 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:41:25,191 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 3 times [2018-06-25 13:41:25,191 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:41:25,191 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:41:25,192 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:41:25,192 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:41:25,192 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:41:25,241 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:41:25,628 WARN ]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-25 13:41:25,629 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:41:25,629 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:41:25,629 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 [2018-06-25 13:41:25,643 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 13:41:25,702 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 13:41:25,702 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:41:25,704 INFO ]: Computing forward predicates... [2018-06-25 13:41:26,550 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:41:26,571 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:41:26,571 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-25 13:41:26,571 INFO ]: Interpolant automaton has 7 states [2018-06-25 13:41:26,571 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-25 13:41:26,571 INFO ]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-06-25 13:41:26,571 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-06-25 13:41:26,636 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:41:26,636 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-25 13:41:26,637 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-25 13:41:26,637 INFO ]: Start accepts. Automaton has 7 states. Word has length 10 [2018-06-25 13:41:26,637 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:41:26,637 INFO ]: With dead ends: 13 [2018-06-25 13:41:26,638 INFO ]: Without dead ends: 13 [2018-06-25 13:41:26,638 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2018-06-25 13:41:26,638 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-25 13:41:26,639 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-25 13:41:26,639 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-25 13:41:26,640 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-25 13:41:26,640 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-06-25 13:41:26,640 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:41:26,640 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-25 13:41:26,640 INFO ]: Interpolant automaton has 7 states. [2018-06-25 13:41:26,640 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-25 13:41:26,640 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-25 13:41:26,640 INFO ]: Found error trace [2018-06-25 13:41:26,640 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:41:26,640 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:41:26,641 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 4 times [2018-06-25 13:41:26,641 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:41:26,641 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:41:26,641 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:41:26,641 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:41:26,641 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:41:26,742 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:41:27,124 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:41:27,124 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:41:27,124 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 [2018-06-25 13:41:27,130 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-25 13:41:27,176 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-25 13:41:27,176 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:41:27,180 INFO ]: Computing forward predicates... [2018-06-25 13:41:36,201 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:41:36,233 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:41:36,233 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2018-06-25 13:41:36,234 INFO ]: Interpolant automaton has 10 states [2018-06-25 13:41:36,234 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-25 13:41:36,234 INFO ]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-06-25 13:41:36,234 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 10 states. [2018-06-25 13:41:37,062 WARN ]: Spent 725.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 12 [2018-06-25 13:41:37,648 WARN ]: Spent 484.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2018-06-25 13:41:37,885 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:41:37,885 INFO ]: Finished difference Result 14 states and 14 transitions. [2018-06-25 13:41:37,885 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-25 13:41:37,885 INFO ]: Start accepts. Automaton has 10 states. Word has length 12 [2018-06-25 13:41:37,885 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:41:37,885 INFO ]: With dead ends: 14 [2018-06-25 13:41:37,885 INFO ]: Without dead ends: 14 [2018-06-25 13:41:37,886 INFO ]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2018-06-25 13:41:37,886 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-25 13:41:37,887 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-06-25 13:41:37,887 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-25 13:41:37,888 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-06-25 13:41:37,888 INFO ]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-06-25 13:41:37,888 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:41:37,888 INFO ]: Abstraction has 14 states and 14 transitions. [2018-06-25 13:41:37,888 INFO ]: Interpolant automaton has 10 states. [2018-06-25 13:41:37,888 INFO ]: Start isEmpty. Operand 14 states and 14 transitions. [2018-06-25 13:41:37,888 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-25 13:41:37,888 INFO ]: Found error trace [2018-06-25 13:41:37,888 INFO ]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:41:37,888 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:41:37,888 INFO ]: Analyzing trace with hash 23503628, now seen corresponding path program 5 times [2018-06-25 13:41:37,888 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:41:37,888 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:41:37,889 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:41:37,889 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:41:37,889 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:41:37,975 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:41:38,267 WARN ]: Spent 129.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 6 [2018-06-25 13:41:38,419 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:41:38,419 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:41:38,419 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:41:38,427 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-25 13:41:38,477 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-25 13:41:38,477 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:41:38,480 INFO ]: Computing forward predicates... [2018-06-25 13:41:50,704 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:41:50,724 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:41:50,724 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2018-06-25 13:41:50,724 INFO ]: Interpolant automaton has 12 states [2018-06-25 13:41:50,724 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-25 13:41:50,724 INFO ]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-06-25 13:41:50,724 INFO ]: Start difference. First operand 14 states and 14 transitions. Second operand 12 states. [2018-06-25 13:41:50,978 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:41:50,978 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-25 13:41:50,978 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-25 13:41:50,978 INFO ]: Start accepts. Automaton has 12 states. Word has length 13 [2018-06-25 13:41:50,978 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:41:50,978 INFO ]: With dead ends: 15 [2018-06-25 13:41:50,979 INFO ]: Without dead ends: 15 [2018-06-25 13:41:50,979 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2018-06-25 13:41:50,979 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-25 13:41:50,980 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-25 13:41:50,980 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-25 13:41:50,981 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-06-25 13:41:50,981 INFO ]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-06-25 13:41:50,981 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:41:50,981 INFO ]: Abstraction has 15 states and 15 transitions. [2018-06-25 13:41:50,981 INFO ]: Interpolant automaton has 12 states. [2018-06-25 13:41:50,981 INFO ]: Start isEmpty. Operand 15 states and 15 transitions. [2018-06-25 13:41:50,981 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-25 13:41:50,981 INFO ]: Found error trace [2018-06-25 13:41:50,981 INFO ]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:41:50,981 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:41:50,982 INFO ]: Analyzing trace with hash 726730004, now seen corresponding path program 6 times [2018-06-25 13:41:50,982 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:41:50,982 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:41:50,982 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:41:50,982 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:41:50,982 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:41:51,063 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:41:51,340 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:41:51,340 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:41:51,340 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-25 13:41:51,355 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:41:51,419 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-06-25 13:41:51,419 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:41:51,428 INFO ]: Computing forward predicates... [2018-06-25 13:41:52,423 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:41:53,284 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:41:54,255 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:41:54,275 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:41:54,275 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2018-06-25 13:41:54,275 INFO ]: Interpolant automaton has 12 states [2018-06-25 13:41:54,276 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-25 13:41:54,276 INFO ]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2018-06-25 13:41:54,276 INFO ]: Start difference. First operand 15 states and 15 transitions. Second operand 12 states. [2018-06-25 13:41:54,540 WARN ]: Spent 182.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2018-06-25 13:41:54,655 WARN ]: Spent 107.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2018-06-25 13:41:54,807 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:41:54,807 INFO ]: Finished difference Result 16 states and 16 transitions. [2018-06-25 13:41:54,807 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-25 13:41:54,807 INFO ]: Start accepts. Automaton has 12 states. Word has length 14 [2018-06-25 13:41:54,808 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:41:54,808 INFO ]: With dead ends: 16 [2018-06-25 13:41:54,808 INFO ]: Without dead ends: 16 [2018-06-25 13:41:54,808 INFO ]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2018-06-25 13:41:54,808 INFO ]: Start minimizeSevpa. Operand 16 states. [2018-06-25 13:41:54,810 INFO ]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-06-25 13:41:54,810 INFO ]: Start removeUnreachable. Operand 16 states. [2018-06-25 13:41:54,810 INFO ]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-06-25 13:41:54,810 INFO ]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-06-25 13:41:54,810 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:41:54,810 INFO ]: Abstraction has 16 states and 16 transitions. [2018-06-25 13:41:54,810 INFO ]: Interpolant automaton has 12 states. [2018-06-25 13:41:54,810 INFO ]: Start isEmpty. Operand 16 states and 16 transitions. [2018-06-25 13:41:54,811 INFO ]: Finished isEmpty. Found accepting run of length 16 [2018-06-25 13:41:54,811 INFO ]: Found error trace [2018-06-25 13:41:54,811 INFO ]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:41:54,811 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:41:54,811 INFO ]: Analyzing trace with hash 1051911180, now seen corresponding path program 7 times [2018-06-25 13:41:54,811 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:41:54,811 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:41:54,812 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:41:54,812 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:41:54,812 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:41:54,894 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:41:55,146 WARN ]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-25 13:41:56,477 WARN ]: Spent 1.28 s on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2018-06-25 13:41:56,696 INFO ]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:41:56,696 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:41:56,696 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:41:56,703 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:41:56,751 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:41:56,755 INFO ]: Computing forward predicates... [2018-06-25 13:42:00,975 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:42:01,831 INFO ]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:42:01,851 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:42:01,851 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2018-06-25 13:42:01,851 INFO ]: Interpolant automaton has 15 states [2018-06-25 13:42:01,851 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-25 13:42:01,851 INFO ]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2018-06-25 13:42:01,851 INFO ]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-06-25 13:42:02,260 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:42:02,260 INFO ]: Finished difference Result 17 states and 17 transitions. [2018-06-25 13:42:02,260 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-25 13:42:02,260 INFO ]: Start accepts. Automaton has 15 states. Word has length 15 [2018-06-25 13:42:02,260 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:42:02,260 INFO ]: With dead ends: 17 [2018-06-25 13:42:02,260 INFO ]: Without dead ends: 17 [2018-06-25 13:42:02,261 INFO ]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2018-06-25 13:42:02,261 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-25 13:42:02,262 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-25 13:42:02,262 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-25 13:42:02,262 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-06-25 13:42:02,263 INFO ]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-06-25 13:42:02,263 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:42:02,263 INFO ]: Abstraction has 17 states and 17 transitions. [2018-06-25 13:42:02,263 INFO ]: Interpolant automaton has 15 states. [2018-06-25 13:42:02,263 INFO ]: Start isEmpty. Operand 17 states and 17 transitions. [2018-06-25 13:42:02,263 INFO ]: Finished isEmpty. Found accepting run of length 17 [2018-06-25 13:42:02,263 INFO ]: Found error trace [2018-06-25 13:42:02,263 INFO ]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:42:02,263 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:42:02,263 INFO ]: Analyzing trace with hash -1752374252, now seen corresponding path program 8 times [2018-06-25 13:42:02,263 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:42:02,263 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:42:02,264 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:42:02,264 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:42:02,264 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:42:02,396 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:42:02,854 INFO ]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:42:02,854 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:42:02,854 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:42:02,861 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 13:42:02,911 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 13:42:02,911 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:42:02,915 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-25 13:42:22,648 INFO ]: Timeout while computing interpolants [2018-06-25 13:42:22,849 WARN ]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:42:22,849 WARN ]: Verification canceled [2018-06-25 13:42:22,853 WARN ]: Timeout [2018-06-25 13:42:22,853 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 01:42:22 BoogieIcfgContainer [2018-06-25 13:42:22,853 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 13:42:22,854 INFO ]: Toolchain (without parser) took 60044.94 ms. Allocated memory was 306.2 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 260.6 MB in the beginning and 1.0 GB in the end (delta: -746.1 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 13:42:22,855 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 306.2 MB. Free memory is still 271.7 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 13:42:22,855 INFO ]: ChcToBoogie took 67.54 ms. Allocated memory is still 306.2 MB. Free memory was 259.6 MB in the beginning and 257.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:42:22,855 INFO ]: Boogie Preprocessor took 52.06 ms. Allocated memory is still 306.2 MB. Free memory was 257.6 MB in the beginning and 256.6 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-25 13:42:22,856 INFO ]: RCFGBuilder took 202.96 ms. Allocated memory is still 306.2 MB. Free memory was 256.6 MB in the beginning and 247.5 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:42:22,856 INFO ]: TraceAbstraction took 59710.81 ms. Allocated memory was 306.2 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 247.5 MB in the beginning and 1.0 GB in the end (delta: -759.1 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 13:42:22,859 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 271.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 67.54 ms. Allocated memory is still 306.2 MB. Free memory was 259.6 MB in the beginning and 257.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 52.06 ms. Allocated memory is still 306.2 MB. Free memory was 257.6 MB in the beginning and 256.6 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 202.96 ms. Allocated memory is still 306.2 MB. Free memory was 256.6 MB in the beginning and 247.5 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 59710.81 ms. Allocated memory was 306.2 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 247.5 MB in the beginning and 1.0 GB in the end (delta: -759.1 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 17 with TraceHistMax 9, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 10 quantified variables from 18 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 59.6s OverallTime, 9 OverallIterations, 9 TraceHistogramMax, 3.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 56 SDtfs, 21 SDslu, 182 SDs, 0 SdLazy, 72 SolverSat, 51 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 165 GetRequests, 53 SyntacticMatches, 23 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 7.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=8, 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, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 34.6s InterpolantComputationTime, 169 NumberOfCodeBlocks, 169 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 154 ConstructedInterpolants, 0 QuantifiedInterpolants, 10888 SizeOfPredicates, 28 NumberOfNonLiveVariables, 1261 ConjunctsInSsa, 275 ConjunctsInUnsatCore, 15 InterpolantComputations, 1 PerfectInterpolantSequences, 0/220 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/up2.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-25_13-42-22-869.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/up2.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_13-42-22-869.csv Completed graceful shutdown