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_No_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if7.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 15:22:38,490 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 15:22:38,492 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 15:22:38,510 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 15:22:38,511 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 15:22:38,513 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 15:22:38,514 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 15:22:38,516 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 15:22:38,518 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 15:22:38,519 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 15:22:38,519 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 15:22:38,520 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 15:22:38,520 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 15:22:38,521 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 15:22:38,522 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 15:22:38,523 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 15:22:38,525 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 15:22:38,526 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 15:22:38,528 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 15:22:38,529 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 15:22:38,530 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 15:22:38,533 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 15:22:38,533 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 15:22:38,533 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 15:22:38,534 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 15:22:38,535 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 15:22:38,536 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 15:22:38,537 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 15:22:38,538 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 15:22:38,538 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 15:22:38,539 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 15:22:38,540 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 15:22:38,540 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 15:22:38,541 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 15:22:38,541 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 15:22:38,542 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 15:22:38,555 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 15:22:38,556 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 15:22:38,556 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 15:22:38,556 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 15:22:38,557 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 15:22:38,557 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 15:22:38,558 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 15:22:38,558 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 15:22:38,558 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 15:22:38,558 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 15:22:38,559 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:22:38,559 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 15:22:38,559 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 15:22:38,559 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 15:22:38,559 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 15:22:38,560 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 15:22:38,560 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 15:22:38,560 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 15:22:38,560 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 15:22:38,562 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 15:22:38,562 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 15:22:38,613 INFO ]: Repository-Root is: /tmp [2018-06-22 15:22:38,627 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 15:22:38,633 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 15:22:38,634 INFO ]: Initializing SmtParser... [2018-06-22 15:22:38,634 INFO ]: SmtParser initialized [2018-06-22 15:22:38,635 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if7.c.smt2 [2018-06-22 15:22:38,637 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 15:22:38,732 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if7.c.smt2 unknown [2018-06-22 15:22:39,016 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if7.c.smt2 [2018-06-22 15:22:39,021 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 15:22:39,026 INFO ]: Walking toolchain with 4 elements. [2018-06-22 15:22:39,027 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 15:22:39,027 INFO ]: Initializing ChcToBoogie... [2018-06-22 15:22:39,027 INFO ]: ChcToBoogie initialized [2018-06-22 15:22:39,030 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:22:39" (1/1) ... [2018-06-22 15:22:39,078 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:22:39 Unit [2018-06-22 15:22:39,078 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 15:22:39,079 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 15:22:39,079 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 15:22:39,080 INFO ]: Boogie Preprocessor initialized [2018-06-22 15:22:39,103 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:22:39" (1/1) ... [2018-06-22 15:22:39,103 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:22:39" (1/1) ... [2018-06-22 15:22:39,116 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:22:39" (1/1) ... [2018-06-22 15:22:39,116 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:22:39" (1/1) ... [2018-06-22 15:22:39,130 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:22:39" (1/1) ... [2018-06-22 15:22:39,131 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:22:39" (1/1) ... [2018-06-22 15:22:39,132 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:22:39" (1/1) ... [2018-06-22 15:22:39,143 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 15:22:39,144 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 15:22:39,144 INFO ]: Initializing RCFGBuilder... [2018-06-22 15:22:39,144 INFO ]: RCFGBuilder initialized [2018-06-22 15:22:39,145 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:22:39" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-22 15:22:39,162 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 15:22:39,162 INFO ]: Found specification of procedure False [2018-06-22 15:22:39,162 INFO ]: Found implementation of procedure False [2018-06-22 15:22:39,162 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 15:22:39,162 INFO ]: Found specification of procedure state [2018-06-22 15:22:39,162 INFO ]: Found implementation of procedure state [2018-06-22 15:22:39,162 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 15:22:39,162 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 15:22:39,162 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 15:22:39,365 INFO ]: Using library mode [2018-06-22 15:22:39,365 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:22:39 BoogieIcfgContainer [2018-06-22 15:22:39,365 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 15:22:39,370 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 15:22:39,370 INFO ]: Initializing TraceAbstraction... [2018-06-22 15:22:39,373 INFO ]: TraceAbstraction initialized [2018-06-22 15:22:39,380 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:22:39" (1/3) ... [2018-06-22 15:22:39,381 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76270969 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 03:22:39, skipping insertion in model container [2018-06-22 15:22:39,381 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:22:39" (2/3) ... [2018-06-22 15:22:39,381 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76270969 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 03:22:39, skipping insertion in model container [2018-06-22 15:22:39,381 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:22:39" (3/3) ... [2018-06-22 15:22:39,383 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 15:22:39,392 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 15:22:39,400 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 15:22:39,465 INFO ]: Using default assertion order modulation [2018-06-22 15:22:39,466 INFO ]: Interprodecural is true [2018-06-22 15:22:39,466 INFO ]: Hoare is false [2018-06-22 15:22:39,466 INFO ]: Compute interpolants for FPandBP [2018-06-22 15:22:39,466 INFO ]: Backedges is TWOTRACK [2018-06-22 15:22:39,466 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 15:22:39,466 INFO ]: Difference is false [2018-06-22 15:22:39,466 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 15:22:39,466 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 15:22:39,479 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 15:22:39,488 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 15:22:39,488 INFO ]: Found error trace [2018-06-22 15:22:39,489 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:22:39,490 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:22:39,493 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 15:22:39,495 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:22:39,495 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:22:39,533 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:22:39,534 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:22:39,534 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:22:39,563 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:22:39,643 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 15:22:39,645 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 15:22:39,645 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 15:22:39,646 INFO ]: Interpolant automaton has 4 states [2018-06-22 15:22:39,656 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 15:22:39,656 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:22:39,658 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 15:22:39,750 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:22:39,751 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 15:22:39,751 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 15:22:39,752 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 15:22:39,752 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:22:39,762 INFO ]: With dead ends: 13 [2018-06-22 15:22:39,762 INFO ]: Without dead ends: 13 [2018-06-22 15:22:39,764 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:22:39,777 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 15:22:39,795 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 15:22:39,796 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 15:22:39,797 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 15:22:39,798 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 15:22:39,798 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:22:39,798 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 15:22:39,798 INFO ]: Interpolant automaton has 4 states. [2018-06-22 15:22:39,798 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 15:22:39,799 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 15:22:39,799 INFO ]: Found error trace [2018-06-22 15:22:39,799 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:22:39,799 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:22:39,799 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 15:22:39,799 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:22:39,799 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:22:39,800 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:22:39,800 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:22:39,800 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:22:39,862 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:22:40,147 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:22:40,148 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:22:40,148 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) [2018-06-22 15:22:40,164 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:22:40,209 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:22:40,219 INFO ]: Computing forward predicates... [2018-06-22 15:22:40,609 WARN ]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 15:22:40,961 WARN ]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-22 15:22:41,038 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:22:41,072 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:22:41,073 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 15:22:41,073 INFO ]: Interpolant automaton has 9 states [2018-06-22 15:22:41,073 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 15:22:41,073 INFO ]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-06-22 15:22:41,074 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 15:22:41,398 WARN ]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-22 15:22:41,714 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:22:41,714 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 15:22:41,716 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 15:22:41,716 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 15:22:41,716 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:22:41,717 INFO ]: With dead ends: 15 [2018-06-22 15:22:41,717 INFO ]: Without dead ends: 15 [2018-06-22 15:22:41,718 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-06-22 15:22:41,718 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 15:22:41,720 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 15:22:41,720 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 15:22:41,721 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 15:22:41,721 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 15:22:41,721 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:22:41,721 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 15:22:41,721 INFO ]: Interpolant automaton has 9 states. [2018-06-22 15:22:41,721 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 15:22:41,722 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 15:22:41,722 INFO ]: Found error trace [2018-06-22 15:22:41,722 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:22:41,722 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:22:41,722 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 15:22:41,722 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:22:41,722 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:22:41,723 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:22:41,723 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:22:41,723 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:22:41,766 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:22:42,241 WARN ]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-06-22 15:22:42,339 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:22:42,339 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:22:42,339 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 15:22:42,348 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:22:42,396 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:22:42,396 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:22:42,400 INFO ]: Computing forward predicates... [2018-06-22 15:22:43,398 WARN ]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-22 15:22:43,417 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:22:43,436 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:22:43,436 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-06-22 15:22:43,437 INFO ]: Interpolant automaton has 11 states [2018-06-22 15:22:43,437 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-22 15:22:43,437 INFO ]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2018-06-22 15:22:43,437 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-06-22 15:22:43,737 WARN ]: Spent 228.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2018-06-22 15:22:43,868 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:22:43,868 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 15:22:43,869 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 15:22:43,869 INFO ]: Start accepts. Automaton has 11 states. Word has length 17 [2018-06-22 15:22:43,869 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:22:43,869 INFO ]: With dead ends: 17 [2018-06-22 15:22:43,869 INFO ]: Without dead ends: 17 [2018-06-22 15:22:43,870 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2018-06-22 15:22:43,870 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 15:22:43,873 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 15:22:43,873 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 15:22:43,874 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 15:22:43,874 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 15:22:43,874 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:22:43,874 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 15:22:43,874 INFO ]: Interpolant automaton has 11 states. [2018-06-22 15:22:43,874 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 15:22:43,874 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 15:22:43,874 INFO ]: Found error trace [2018-06-22 15:22:43,874 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:22:43,875 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:22:43,875 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 15:22:43,875 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:22:43,875 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:22:43,876 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:22:43,876 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:22:43,876 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:22:43,934 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:22:44,216 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:22:44,216 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:22:44,216 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 15:22:44,233 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 15:22:44,298 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 15:22:44,298 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:22:44,301 INFO ]: Computing forward predicates... [2018-06-22 15:22:44,709 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:22:44,730 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:22:44,730 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2018-06-22 15:22:44,730 INFO ]: Interpolant automaton has 13 states [2018-06-22 15:22:44,731 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 15:22:44,731 INFO ]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2018-06-22 15:22:44,731 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 13 states. [2018-06-22 15:22:44,936 WARN ]: Spent 151.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2018-06-22 15:22:45,211 WARN ]: Spent 115.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2018-06-22 15:22:45,307 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:22:45,307 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 15:22:45,308 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 15:22:45,308 INFO ]: Start accepts. Automaton has 13 states. Word has length 21 [2018-06-22 15:22:45,308 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:22:45,309 INFO ]: With dead ends: 19 [2018-06-22 15:22:45,309 INFO ]: Without dead ends: 19 [2018-06-22 15:22:45,309 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2018-06-22 15:22:45,309 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 15:22:45,312 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 15:22:45,312 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 15:22:45,313 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 15:22:45,313 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 15:22:45,313 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:22:45,313 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 15:22:45,313 INFO ]: Interpolant automaton has 13 states. [2018-06-22 15:22:45,313 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 15:22:45,314 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 15:22:45,314 INFO ]: Found error trace [2018-06-22 15:22:45,314 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:22:45,314 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:22:45,314 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-22 15:22:45,314 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:22:45,314 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:22:45,315 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:22:45,315 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:22:45,315 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:22:45,352 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:22:45,736 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:22:45,736 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:22:45,736 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 15:22:45,743 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 15:22:45,797 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 15:22:45,797 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:22:45,801 INFO ]: Computing forward predicates... [2018-06-22 15:22:46,060 WARN ]: Spent 150.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 14 [2018-06-22 15:22:46,341 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:22:46,361 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:22:46,361 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2018-06-22 15:22:46,361 INFO ]: Interpolant automaton has 15 states [2018-06-22 15:22:46,361 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-22 15:22:46,361 INFO ]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2018-06-22 15:22:46,361 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 15 states. [2018-06-22 15:22:46,673 WARN ]: Spent 237.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2018-06-22 15:22:46,870 WARN ]: Spent 110.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2018-06-22 15:22:47,094 WARN ]: Spent 108.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2018-06-22 15:22:47,119 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:22:47,119 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 15:22:47,124 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 15:22:47,124 INFO ]: Start accepts. Automaton has 15 states. Word has length 25 [2018-06-22 15:22:47,124 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:22:47,124 INFO ]: With dead ends: 21 [2018-06-22 15:22:47,124 INFO ]: Without dead ends: 21 [2018-06-22 15:22:47,125 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2018-06-22 15:22:47,125 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 15:22:47,128 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 15:22:47,128 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 15:22:47,128 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 15:22:47,128 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 15:22:47,128 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:22:47,129 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 15:22:47,129 INFO ]: Interpolant automaton has 15 states. [2018-06-22 15:22:47,129 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 15:22:47,129 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 15:22:47,129 INFO ]: Found error trace [2018-06-22 15:22:47,129 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:22:47,130 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:22:47,130 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 5 times [2018-06-22 15:22:47,130 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:22:47,130 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:22:47,130 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:22:47,130 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:22:47,130 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:22:47,210 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:22:47,483 WARN ]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 15:22:47,800 WARN ]: Spent 229.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2018-06-22 15:22:48,008 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:22:48,009 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:22:48,009 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:22:48,017 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 15:22:48,105 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 15:22:48,105 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:22:48,110 INFO ]: Computing forward predicates... [2018-06-22 15:22:48,409 WARN ]: Spent 212.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2018-06-22 15:22:48,688 WARN ]: Spent 209.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 27 [2018-06-22 15:22:48,816 WARN ]: Spent 103.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2018-06-22 15:22:50,617 WARN ]: Spent 453.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-22 15:22:50,637 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:22:50,669 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:22:50,669 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2018-06-22 15:22:50,670 INFO ]: Interpolant automaton has 19 states [2018-06-22 15:22:50,670 INFO ]: Constructing interpolant automaton starting with 19 interpolants. [2018-06-22 15:22:50,670 INFO ]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2018-06-22 15:22:50,670 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 19 states. [2018-06-22 15:22:52,420 WARN ]: Spent 1.58 s on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2018-06-22 15:22:52,777 WARN ]: Spent 195.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 24 [2018-06-22 15:22:53,084 WARN ]: Spent 272.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 29 [2018-06-22 15:22:53,368 WARN ]: Spent 261.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 34 [2018-06-22 15:22:53,683 WARN ]: Spent 278.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 [2018-06-22 15:22:53,716 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:22:53,716 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 15:22:53,717 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 15:22:53,717 INFO ]: Start accepts. Automaton has 19 states. Word has length 29 [2018-06-22 15:22:53,717 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:22:53,717 INFO ]: With dead ends: 23 [2018-06-22 15:22:53,717 INFO ]: Without dead ends: 23 [2018-06-22 15:22:53,718 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2018-06-22 15:22:53,718 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 15:22:53,720 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 15:22:53,720 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 15:22:53,721 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 15:22:53,721 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 15:22:53,721 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:22:53,721 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 15:22:53,721 INFO ]: Interpolant automaton has 19 states. [2018-06-22 15:22:53,721 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 15:22:53,722 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 15:22:53,722 INFO ]: Found error trace [2018-06-22 15:22:53,722 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:22:53,722 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:22:53,722 INFO ]: Analyzing trace with hash 800064122, now seen corresponding path program 6 times [2018-06-22 15:22:53,722 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:22:53,722 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:22:53,725 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:22:53,725 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:22:53,725 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:22:53,811 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:22:54,220 WARN ]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-22 15:22:55,025 WARN ]: Spent 754.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-06-22 15:22:55,283 WARN ]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-06-22 15:22:55,544 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:22:55,544 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:22:55,544 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:22:55,550 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 15:22:55,627 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-22 15:22:55,627 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:22:55,632 INFO ]: Computing forward predicates... [2018-06-22 15:22:56,080 WARN ]: Spent 260.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 31 [2018-06-22 15:22:56,411 WARN ]: Spent 124.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2018-06-22 15:22:56,689 WARN ]: Spent 158.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2018-06-22 15:22:57,444 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:22:57,474 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:22:57,474 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2018-06-22 15:22:57,474 INFO ]: Interpolant automaton has 22 states [2018-06-22 15:22:57,474 INFO ]: Constructing interpolant automaton starting with 22 interpolants. [2018-06-22 15:22:57,475 INFO ]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2018-06-22 15:22:57,475 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 22 states. [2018-06-22 15:22:57,900 WARN ]: Spent 292.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2018-06-22 15:22:58,094 WARN ]: Spent 149.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 21 [2018-06-22 15:22:58,311 WARN ]: Spent 137.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 27 [2018-06-22 15:22:58,520 WARN ]: Spent 181.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 30 [2018-06-22 15:22:58,747 WARN ]: Spent 204.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 33 [2018-06-22 15:22:59,032 WARN ]: Spent 244.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2018-06-22 15:22:59,292 WARN ]: Spent 236.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2018-06-22 15:22:59,320 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:22:59,320 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 15:22:59,321 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 15:22:59,321 INFO ]: Start accepts. Automaton has 22 states. Word has length 33 [2018-06-22 15:22:59,321 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:22:59,322 INFO ]: With dead ends: 25 [2018-06-22 15:22:59,322 INFO ]: Without dead ends: 25 [2018-06-22 15:22:59,322 INFO ]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2018-06-22 15:22:59,322 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 15:22:59,325 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 15:22:59,325 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 15:22:59,326 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 15:22:59,326 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 33 [2018-06-22 15:22:59,326 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:22:59,326 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 15:22:59,326 INFO ]: Interpolant automaton has 22 states. [2018-06-22 15:22:59,326 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 15:22:59,327 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 15:22:59,327 INFO ]: Found error trace [2018-06-22 15:22:59,327 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:22:59,327 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:22:59,327 INFO ]: Analyzing trace with hash -411423458, now seen corresponding path program 7 times [2018-06-22 15:22:59,327 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:22:59,327 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:22:59,328 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:22:59,328 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:22:59,328 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:22:59,404 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:23:00,478 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:23:00,478 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:23:00,524 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:23:00,529 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:23:00,581 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:23:00,587 INFO ]: Computing forward predicates... [2018-06-22 15:23:00,798 WARN ]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 25 [2018-06-22 15:23:01,103 WARN ]: Spent 255.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 31 [2018-06-22 15:23:01,375 WARN ]: Spent 154.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2018-06-22 15:23:01,586 WARN ]: Spent 168.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2018-06-22 15:23:02,706 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:23:02,726 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:23:02,726 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2018-06-22 15:23:02,726 INFO ]: Interpolant automaton has 33 states [2018-06-22 15:23:02,726 INFO ]: Constructing interpolant automaton starting with 33 interpolants. [2018-06-22 15:23:02,727 INFO ]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2018-06-22 15:23:02,727 INFO ]: Start difference. First operand 25 states and 26 transitions. Second operand 33 states. [2018-06-22 15:23:03,575 WARN ]: Spent 813.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 82 [2018-06-22 15:23:03,839 WARN ]: Spent 218.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 35 [2018-06-22 15:23:04,155 WARN ]: Spent 271.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 35 [2018-06-22 15:23:04,641 WARN ]: Spent 443.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 52 [2018-06-22 15:23:04,999 WARN ]: Spent 324.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 43 [2018-06-22 15:23:05,286 WARN ]: Spent 253.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 39 [2018-06-22 15:23:05,627 WARN ]: Spent 308.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 41 [2018-06-22 15:23:06,121 WARN ]: Spent 431.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 65 [2018-06-22 15:23:06,160 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:23:06,160 INFO ]: Finished difference Result 27 states and 28 transitions. [2018-06-22 15:23:06,161 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 15:23:06,161 INFO ]: Start accepts. Automaton has 33 states. Word has length 37 [2018-06-22 15:23:06,161 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:23:06,162 INFO ]: With dead ends: 27 [2018-06-22 15:23:06,162 INFO ]: Without dead ends: 27 [2018-06-22 15:23:06,163 INFO ]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=261, Invalid=1379, Unknown=0, NotChecked=0, Total=1640 [2018-06-22 15:23:06,163 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-22 15:23:06,166 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-06-22 15:23:06,166 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-22 15:23:06,167 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-06-22 15:23:06,169 INFO ]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 37 [2018-06-22 15:23:06,169 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:23:06,169 INFO ]: Abstraction has 27 states and 28 transitions. [2018-06-22 15:23:06,169 INFO ]: Interpolant automaton has 33 states. [2018-06-22 15:23:06,169 INFO ]: Start isEmpty. Operand 27 states and 28 transitions. [2018-06-22 15:23:06,170 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 15:23:06,170 INFO ]: Found error trace [2018-06-22 15:23:06,170 INFO ]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:23:06,171 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:23:06,171 INFO ]: Analyzing trace with hash -544278078, now seen corresponding path program 8 times [2018-06-22 15:23:06,171 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:23:06,171 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:23:06,171 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:23:06,171 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:23:06,171 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:23:06,285 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:23:06,648 WARN ]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-22 15:23:06,846 WARN ]: Spent 187.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2018-06-22 15:23:07,064 WARN ]: Spent 210.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2018-06-22 15:23:07,231 WARN ]: Spent 152.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2018-06-22 15:23:07,438 WARN ]: Spent 194.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2018-06-22 15:23:07,606 WARN ]: Spent 149.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 29 [2018-06-22 15:23:08,338 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 15:23:08,338 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:23:08,338 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 [2018-06-22 15:23:08,344 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:23:08,405 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:23:08,405 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:23:08,418 INFO ]: Computing forward predicates... [2018-06-22 15:23:09,235 WARN ]: Spent 699.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2018-06-22 15:23:09,547 WARN ]: Spent 250.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2018-06-22 15:23:09,849 WARN ]: Spent 236.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2018-06-22 15:23:10,077 WARN ]: Spent 161.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2018-06-22 15:23:10,643 WARN ]: Spent 499.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 39 [2018-06-22 15:23:14,769 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 15:23:14,788 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:23:14,788 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 37 [2018-06-22 15:23:14,789 INFO ]: Interpolant automaton has 37 states [2018-06-22 15:23:14,789 INFO ]: Constructing interpolant automaton starting with 37 interpolants. [2018-06-22 15:23:14,789 INFO ]: CoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2018-06-22 15:23:14,789 INFO ]: Start difference. First operand 27 states and 28 transitions. Second operand 37 states. [2018-06-22 15:23:16,219 WARN ]: Spent 1.32 s on a formula simplification. DAG size of input: 203 DAG size of output: 144 [2018-06-22 15:23:16,741 WARN ]: Spent 388.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 49 [2018-06-22 15:23:17,297 WARN ]: Spent 455.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 44 [2018-06-22 15:23:17,860 WARN ]: Spent 479.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 65 [2018-06-22 15:23:18,618 WARN ]: Spent 662.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 65 [2018-06-22 15:23:19,317 WARN ]: Spent 640.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 52 [2018-06-22 15:23:20,169 WARN ]: Spent 777.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 74 [2018-06-22 15:23:20,952 WARN ]: Spent 720.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 64 [2018-06-22 15:23:22,178 WARN ]: Spent 1.15 s on a formula simplification. DAG size of input: 206 DAG size of output: 107 [2018-06-22 15:23:22,237 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:23:22,299 INFO ]: Finished difference Result 29 states and 30 transitions. [2018-06-22 15:23:22,300 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 15:23:22,300 INFO ]: Start accepts. Automaton has 37 states. Word has length 41 [2018-06-22 15:23:22,300 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:23:22,301 INFO ]: With dead ends: 29 [2018-06-22 15:23:22,301 INFO ]: Without dead ends: 29 [2018-06-22 15:23:22,302 INFO ]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=319, Invalid=1843, Unknown=0, NotChecked=0, Total=2162 [2018-06-22 15:23:22,302 INFO ]: Start minimizeSevpa. Operand 29 states. [2018-06-22 15:23:22,307 INFO ]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-06-22 15:23:22,307 INFO ]: Start removeUnreachable. Operand 29 states. [2018-06-22 15:23:22,307 INFO ]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-06-22 15:23:22,308 INFO ]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 41 [2018-06-22 15:23:22,308 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:23:22,308 INFO ]: Abstraction has 29 states and 30 transitions. [2018-06-22 15:23:22,308 INFO ]: Interpolant automaton has 37 states. [2018-06-22 15:23:22,308 INFO ]: Start isEmpty. Operand 29 states and 30 transitions. [2018-06-22 15:23:22,308 INFO ]: Finished isEmpty. Found accepting run of length 46 [2018-06-22 15:23:22,308 INFO ]: Found error trace [2018-06-22 15:23:22,308 INFO ]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:23:22,308 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:23:22,309 INFO ]: Analyzing trace with hash 1442343014, now seen corresponding path program 9 times [2018-06-22 15:23:22,309 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:23:22,309 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:23:22,309 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:23:22,309 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:23:22,309 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:23:22,447 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:23:23,179 WARN ]: Spent 580.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-06-22 15:23:23,353 WARN ]: Spent 125.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2018-06-22 15:23:23,780 WARN ]: Spent 132.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2018-06-22 15:23:23,910 WARN ]: Spent 115.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2018-06-22 15:23:24,460 INFO ]: Checked inductivity of 171 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 15:23:24,460 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:23:24,460 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:23:24,465 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 15:23:24,544 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-06-22 15:23:24,544 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:23:24,560 INFO ]: Computing forward predicates... [2018-06-22 15:23:25,102 WARN ]: Spent 443.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 34 [2018-06-22 15:23:25,623 WARN ]: Spent 460.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-06-22 15:23:26,196 WARN ]: Spent 478.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2018-06-22 15:23:26,517 WARN ]: Spent 260.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2018-06-22 15:23:26,731 WARN ]: Spent 164.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2018-06-22 15:23:30,644 INFO ]: Checked inductivity of 171 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 15:23:30,664 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:23:30,664 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 39 [2018-06-22 15:23:30,664 INFO ]: Interpolant automaton has 39 states [2018-06-22 15:23:30,664 INFO ]: Constructing interpolant automaton starting with 39 interpolants. [2018-06-22 15:23:30,665 INFO ]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2018-06-22 15:23:30,665 INFO ]: Start difference. First operand 29 states and 30 transitions. Second operand 39 states. [2018-06-22 15:23:32,624 WARN ]: Spent 1.83 s on a formula simplification. DAG size of input: 190 DAG size of output: 146 [2018-06-22 15:23:33,424 WARN ]: Spent 695.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 63 [2018-06-22 15:23:33,982 WARN ]: Spent 483.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 71 [2018-06-22 15:23:34,695 WARN ]: Spent 644.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 65 [2018-06-22 15:23:35,438 WARN ]: Spent 668.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 64 [2018-06-22 15:23:36,231 WARN ]: Spent 713.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 83 [2018-06-22 15:23:37,089 WARN ]: Spent 767.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 48 [2018-06-22 15:23:37,998 WARN ]: Spent 772.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 47 [2018-06-22 15:23:38,726 WARN ]: Spent 654.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 72 Received shutdown request... [2018-06-22 15:23:39,276 WARN ]: Removed 2 from assertion stack [2018-06-22 15:23:39,276 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 15:23:39,276 WARN ]: Verification canceled [2018-06-22 15:23:39,279 WARN ]: Timeout [2018-06-22 15:23:39,279 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 03:23:39 BoogieIcfgContainer [2018-06-22 15:23:39,280 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 15:23:39,280 INFO ]: Toolchain (without parser) took 60259.34 ms. Allocated memory was 306.7 MB in the beginning and 829.9 MB in the end (delta: 523.2 MB). Free memory was 259.8 MB in the beginning and 335.2 MB in the end (delta: -75.4 MB). Peak memory consumption was 447.8 MB. Max. memory is 3.6 GB. [2018-06-22 15:23:39,281 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 306.7 MB. Free memory is still 272.5 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 15:23:39,281 INFO ]: ChcToBoogie took 51.66 ms. Allocated memory is still 306.7 MB. Free memory was 259.8 MB in the beginning and 257.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:23:39,282 INFO ]: Boogie Preprocessor took 64.77 ms. Allocated memory is still 306.7 MB. Free memory was 257.8 MB in the beginning and 255.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:23:39,283 INFO ]: RCFGBuilder took 221.62 ms. Allocated memory is still 306.7 MB. Free memory was 255.8 MB in the beginning and 246.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 3.6 GB. [2018-06-22 15:23:39,283 INFO ]: TraceAbstraction took 59910.01 ms. Allocated memory was 306.7 MB in the beginning and 829.9 MB in the end (delta: 523.2 MB). Free memory was 246.2 MB in the beginning and 335.2 MB in the end (delta: -89.0 MB). Peak memory consumption was 434.3 MB. Max. memory is 3.6 GB. [2018-06-22 15:23:39,285 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 306.7 MB. Free memory is still 272.5 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 51.66 ms. Allocated memory is still 306.7 MB. Free memory was 259.8 MB in the beginning and 257.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 64.77 ms. Allocated memory is still 306.7 MB. Free memory was 257.8 MB in the beginning and 255.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 221.62 ms. Allocated memory is still 306.7 MB. Free memory was 255.8 MB in the beginning and 246.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 3.6 GB. * TraceAbstraction took 59910.01 ms. Allocated memory was 306.7 MB in the beginning and 829.9 MB in the end (delta: 523.2 MB). Free memory was 246.2 MB in the beginning and 335.2 MB in the end (delta: -89.0 MB). Peak memory consumption was 434.3 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was constructing difference of abstraction (29states) and interpolant automaton (currently 13 states, 39 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 196. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 59.8s OverallTime, 10 OverallIterations, 10 TraceHistogramMax, 26.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 138 SDtfs, 517 SDslu, 1062 SDs, 0 SdLazy, 977 SolverSat, 629 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 443 GetRequests, 194 SyntacticMatches, 6 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 44.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=9, 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, 9 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 30.9s InterpolantComputationTime, 531 NumberOfCodeBlocks, 531 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 512 ConstructedInterpolants, 0 QuantifiedInterpolants, 1814252 SizeOfPredicates, 619 NumberOfNonLiveVariables, 2304 ConjunctsInSsa, 459 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 330/1230 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nest-if7.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_15-23-39-296.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nest-if7.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_15-23-39-296.csv Completed graceful shutdown