java -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/chccomp2018/chcToBoogie_automizer.epf -i /storage/chc-comp/vmt-chc-benchmarks/cav12/kundu-bug-1.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 12:46:42,613 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 12:46:42,616 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 12:46:42,633 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 12:46:42,634 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 12:46:42,636 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 12:46:42,637 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 12:46:42,639 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 12:46:42,641 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 12:46:42,641 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 12:46:42,643 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 12:46:42,644 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 12:46:42,644 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 12:46:42,646 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 12:46:42,648 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 12:46:42,649 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 12:46:42,651 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 12:46:42,656 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 12:46:42,657 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 12:46:42,670 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 12:46:42,672 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 12:46:42,674 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 12:46:42,674 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 12:46:42,674 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 12:46:42,675 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 12:46:42,676 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 12:46:42,677 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 12:46:42,678 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 12:46:42,679 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 12:46:42,681 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 12:46:42,682 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 12:46:42,683 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 12:46:42,683 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 12:46:42,684 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 12:46:42,684 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 12:46:42,685 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 12:46:42,707 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 12:46:42,708 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 12:46:42,708 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 12:46:42,708 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 12:46:42,709 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 12:46:42,710 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 12:46:42,710 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 12:46:42,711 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 12:46:42,711 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 12:46:42,711 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 12:46:42,711 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 12:46:42,711 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 12:46:42,711 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 12:46:42,712 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 12:46:42,712 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 12:46:42,712 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 12:46:42,712 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 12:46:42,714 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 12:46:42,717 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 12:46:42,765 INFO ]: Repository-Root is: /tmp [2018-06-18 12:46:42,781 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 12:46:42,785 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 12:46:42,787 INFO ]: Initializing SmtParser... [2018-06-18 12:46:42,787 INFO ]: SmtParser initialized [2018-06-18 12:46:42,788 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/kundu-bug-1.smt2 [2018-06-18 12:46:42,789 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 [2018-06-18 12:46:42,878 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/kundu-bug-1.smt2 unknown [2018-06-18 12:46:43,448 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/kundu-bug-1.smt2 [2018-06-18 12:46:43,453 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 12:46:43,458 INFO ]: Walking toolchain with 4 elements. [2018-06-18 12:46:43,459 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 12:46:43,459 INFO ]: Initializing ChcToBoogie... [2018-06-18 12:46:43,459 INFO ]: ChcToBoogie initialized [2018-06-18 12:46:43,466 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 12:46:43" (1/1) ... [2018-06-18 12:46:45,395 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:46:45 Unit [2018-06-18 12:46:45,395 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 12:46:45,396 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 12:46:45,396 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 12:46:45,396 INFO ]: Boogie Preprocessor initialized [2018-06-18 12:46:45,420 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:46:45" (1/1) ... [2018-06-18 12:46:45,420 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:46:45" (1/1) ... [2018-06-18 12:46:45,502 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:46:45" (1/1) ... [2018-06-18 12:46:45,502 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:46:45" (1/1) ... [2018-06-18 12:46:45,608 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:46:45" (1/1) ... [2018-06-18 12:46:45,609 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:46:45" (1/1) ... [2018-06-18 12:46:45,672 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:46:45" (1/1) ... [2018-06-18 12:46:45,739 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 12:46:45,739 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 12:46:45,739 INFO ]: Initializing RCFGBuilder... [2018-06-18 12:46:45,739 INFO ]: RCFGBuilder initialized [2018-06-18 12:46:45,740 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:46:45" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 12:46:45,753 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 12:46:45,754 INFO ]: Found specification of procedure False [2018-06-18 12:46:45,754 INFO ]: Found implementation of procedure False [2018-06-18 12:46:45,754 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-18 12:46:45,754 INFO ]: Found specification of procedure state [2018-06-18 12:46:45,754 INFO ]: Found implementation of procedure state [2018-06-18 12:46:45,754 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 12:46:45,754 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 12:46:45,754 INFO ]: Found implementation of procedure Ultimate.START [2018-06-18 12:46:48,179 INFO ]: Using library mode [2018-06-18 12:46:48,180 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 12:46:48 BoogieIcfgContainer [2018-06-18 12:46:48,180 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 12:46:48,181 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 12:46:48,181 INFO ]: Initializing TraceAbstraction... [2018-06-18 12:46:48,184 INFO ]: TraceAbstraction initialized [2018-06-18 12:46:48,185 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 12:46:43" (1/3) ... [2018-06-18 12:46:48,189 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2132cd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 12:46:48, skipping insertion in model container [2018-06-18 12:46:48,189 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:46:45" (2/3) ... [2018-06-18 12:46:48,190 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2132cd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 12:46:48, skipping insertion in model container [2018-06-18 12:46:48,190 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 12:46:48" (3/3) ... [2018-06-18 12:46:48,192 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 12:46:48,203 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 12:46:48,214 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 12:46:48,270 INFO ]: Using default assertion order modulation [2018-06-18 12:46:48,270 INFO ]: Interprodecural is true [2018-06-18 12:46:48,270 INFO ]: Hoare is false [2018-06-18 12:46:48,270 INFO ]: Compute interpolants for FPandBP [2018-06-18 12:46:48,270 INFO ]: Backedges is TWOTRACK [2018-06-18 12:46:48,271 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 12:46:48,271 INFO ]: Difference is false [2018-06-18 12:46:48,271 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 12:46:48,271 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 12:46:48,291 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 12:46:48,305 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 12:46:48,305 INFO ]: Found error trace [2018-06-18 12:46:48,307 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:46:48,307 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:46:48,313 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-18 12:46:48,315 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:46:48,316 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:46:48,367 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:46:48,367 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 12:46:48,367 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:46:48,415 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:46:48,427 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:46:48,574 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 12:46:48,576 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 12:46:48,576 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 12:46:48,577 INFO ]: Interpolant automaton has 4 states [2018-06-18 12:46:48,594 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 12:46:48,594 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 12:46:48,598 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 12:46:48,739 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 12:46:48,739 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 12:46:48,742 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 12:46:48,743 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 12:46:48,744 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 12:46:48,759 INFO ]: With dead ends: 13 [2018-06-18 12:46:48,759 INFO ]: Without dead ends: 13 [2018-06-18 12:46:48,764 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 [2018-06-18 12:46:48,784 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 12:46:48,822 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 12:46:48,824 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 12:46:48,824 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 12:46:48,828 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 12:46:48,828 INFO ]: Finished accepts. word is rejected. [2018-06-18 12:46:48,828 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 12:46:48,828 INFO ]: Interpolant automaton has 4 states. [2018-06-18 12:46:48,828 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 12:46:48,830 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 12:46:48,830 INFO ]: Found error trace [2018-06-18 12:46:48,830 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:46:48,830 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:46:48,831 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-18 12:46:48,831 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:46:48,831 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:46:48,832 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:46:48,832 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 12:46:48,832 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:46:48,988 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:46:48,989 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:46:49,349 WARN ]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-18 12:46:49,527 WARN ]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-18 12:46:49,550 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 12:46:49,550 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 12:46:49,550 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 [2018-06-18 12:46:49,560 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 12:46:49,683 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:46:49,698 INFO ]: Computing forward predicates... [2018-06-18 12:46:50,707 WARN ]: Spent 436.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2018-06-18 12:46:50,833 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 12:46:50,856 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 12:46:50,856 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-18 12:46:50,856 INFO ]: Interpolant automaton has 10 states [2018-06-18 12:46:50,857 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-18 12:46:50,857 INFO ]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-06-18 12:46:50,857 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 10 states. [2018-06-18 12:46:51,462 WARN ]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-06-18 12:46:51,671 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 12:46:51,672 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 12:46:51,673 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 12:46:51,673 INFO ]: Start accepts. Automaton has 10 states. Word has length 13 [2018-06-18 12:46:51,674 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 12:46:51,674 INFO ]: With dead ends: 15 [2018-06-18 12:46:51,674 INFO ]: Without dead ends: 15 [2018-06-18 12:46:51,675 INFO ]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2018-06-18 12:46:51,675 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 12:46:51,678 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 12:46:51,678 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 12:46:51,678 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 12:46:51,679 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 12:46:51,679 INFO ]: Finished accepts. word is rejected. [2018-06-18 12:46:51,679 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 12:46:51,679 INFO ]: Interpolant automaton has 10 states. [2018-06-18 12:46:51,679 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 12:46:51,679 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 12:46:51,679 INFO ]: Found error trace [2018-06-18 12:46:51,679 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:46:51,680 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:46:51,680 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-18 12:46:51,680 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:46:51,680 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:46:51,681 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:46:51,681 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 12:46:51,681 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:46:51,781 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:46:51,782 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:46:52,061 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 12:46:52,061 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 12:46:52,061 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 [2018-06-18 12:46:52,069 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 12:46:52,154 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 12:46:52,154 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:46:52,162 INFO ]: Computing forward predicates... [2018-06-18 12:46:52,492 WARN ]: Spent 172.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2018-06-18 12:46:53,361 WARN ]: Spent 753.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2018-06-18 12:46:53,448 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 12:46:53,481 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 12:46:53,481 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-18 12:46:53,482 INFO ]: Interpolant automaton has 13 states [2018-06-18 12:46:53,482 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-18 12:46:53,482 INFO ]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2018-06-18 12:46:53,482 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-18 12:46:53,823 WARN ]: Spent 306.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2018-06-18 12:46:54,003 WARN ]: Spent 146.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 23 [2018-06-18 12:46:54,317 WARN ]: Spent 291.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2018-06-18 12:46:54,348 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 12:46:54,348 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-18 12:46:54,348 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-18 12:46:54,348 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-18 12:46:54,348 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 12:46:54,349 INFO ]: With dead ends: 17 [2018-06-18 12:46:54,349 INFO ]: Without dead ends: 17 [2018-06-18 12:46:54,349 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2018-06-18 12:46:54,349 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-18 12:46:54,352 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-18 12:46:54,353 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-18 12:46:54,353 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-18 12:46:54,353 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-18 12:46:54,353 INFO ]: Finished accepts. word is rejected. [2018-06-18 12:46:54,353 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-18 12:46:54,353 INFO ]: Interpolant automaton has 13 states. [2018-06-18 12:46:54,353 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-18 12:46:54,354 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-18 12:46:54,354 INFO ]: Found error trace [2018-06-18 12:46:54,354 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:46:54,354 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:46:54,354 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-18 12:46:54,354 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:46:54,354 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:46:54,355 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:46:54,355 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 12:46:54,355 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:46:54,460 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:46:54,462 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:46:54,963 WARN ]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-18 12:46:55,084 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 12:46:55,084 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 12:46:55,084 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 [2018-06-18 12:46:55,092 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-18 12:46:55,178 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-18 12:46:55,178 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:46:55,188 INFO ]: Computing forward predicates... [2018-06-18 12:46:55,816 WARN ]: Spent 180.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2018-06-18 12:46:56,492 WARN ]: Spent 549.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2018-06-18 12:46:56,677 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 12:46:56,699 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 12:46:56,699 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-18 12:46:56,699 INFO ]: Interpolant automaton has 17 states [2018-06-18 12:46:56,700 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-18 12:46:56,700 INFO ]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2018-06-18 12:46:56,700 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-18 12:46:58,555 WARN ]: Spent 1.81 s on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2018-06-18 12:46:59,128 WARN ]: Spent 332.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2018-06-18 12:46:59,233 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 12:46:59,233 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-18 12:46:59,234 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-18 12:46:59,234 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-18 12:46:59,235 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 12:46:59,235 INFO ]: With dead ends: 19 [2018-06-18 12:46:59,235 INFO ]: Without dead ends: 19 [2018-06-18 12:46:59,235 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2018-06-18 12:46:59,235 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-18 12:46:59,238 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-18 12:46:59,238 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-18 12:46:59,239 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-18 12:46:59,239 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-18 12:46:59,239 INFO ]: Finished accepts. word is rejected. [2018-06-18 12:46:59,239 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-18 12:46:59,239 INFO ]: Interpolant automaton has 17 states. [2018-06-18 12:46:59,239 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-18 12:46:59,240 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-18 12:46:59,240 INFO ]: Found error trace [2018-06-18 12:46:59,240 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:46:59,240 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:46:59,240 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-18 12:46:59,240 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:46:59,240 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:46:59,241 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:46:59,241 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 12:46:59,241 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:46:59,400 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:46:59,401 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:47:00,304 WARN ]: Spent 551.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2018-06-18 12:47:00,443 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-18 12:47:00,443 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 12:47:00,443 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 [2018-06-18 12:47:00,451 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-18 12:47:00,584 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-18 12:47:00,584 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:47:00,596 INFO ]: Computing forward predicates... [2018-06-18 12:47:01,343 WARN ]: Spent 391.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2018-06-18 12:47:02,438 WARN ]: Spent 774.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2018-06-18 12:47:03,003 WARN ]: Spent 261.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2018-06-18 12:47:03,982 WARN ]: Spent 652.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2018-06-18 12:47:04,157 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-18 12:47:04,178 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 12:47:04,178 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2018-06-18 12:47:04,179 INFO ]: Interpolant automaton has 21 states [2018-06-18 12:47:04,179 INFO ]: Constructing interpolant automaton starting with 21 interpolants. [2018-06-18 12:47:04,179 INFO ]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2018-06-18 12:47:04,179 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 21 states. [2018-06-18 12:47:05,100 WARN ]: Spent 875.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2018-06-18 12:47:05,374 WARN ]: Spent 106.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 25 [2018-06-18 12:47:05,650 WARN ]: Spent 218.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 36 [2018-06-18 12:47:06,283 WARN ]: Spent 596.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 47 [2018-06-18 12:47:06,320 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 12:47:06,320 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-18 12:47:06,320 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-18 12:47:06,320 INFO ]: Start accepts. Automaton has 21 states. Word has length 25 [2018-06-18 12:47:06,321 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 12:47:06,321 INFO ]: With dead ends: 21 [2018-06-18 12:47:06,321 INFO ]: Without dead ends: 21 [2018-06-18 12:47:06,322 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2018-06-18 12:47:06,322 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-18 12:47:06,325 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-18 12:47:06,325 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-18 12:47:06,325 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-18 12:47:06,325 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-18 12:47:06,326 INFO ]: Finished accepts. word is rejected. [2018-06-18 12:47:06,326 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-18 12:47:06,326 INFO ]: Interpolant automaton has 21 states. [2018-06-18 12:47:06,326 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-18 12:47:06,327 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-18 12:47:06,327 INFO ]: Found error trace [2018-06-18 12:47:06,327 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:47:06,327 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:47:06,327 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 5 times [2018-06-18 12:47:06,327 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:47:06,327 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:47:06,328 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:47:06,328 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 12:47:06,328 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:47:06,595 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:47:06,596 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:47:07,625 WARN ]: Spent 531.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2018-06-18 12:47:07,905 WARN ]: Spent 273.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2018-06-18 12:47:08,214 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-18 12:47:08,214 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 12:47:08,214 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 [2018-06-18 12:47:08,223 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-18 12:47:08,433 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-18 12:47:08,433 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:47:08,447 INFO ]: Computing forward predicates... [2018-06-18 12:47:08,779 WARN ]: Spent 170.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2018-06-18 12:47:09,823 WARN ]: Spent 917.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2018-06-18 12:47:12,377 WARN ]: Spent 1.48 s on a formula simplification. DAG size of input: 97 DAG size of output: 85 [2018-06-18 12:47:14,410 WARN ]: Spent 1.09 s on a formula simplification. DAG size of input: 103 DAG size of output: 89 [2018-06-18 12:47:16,259 WARN ]: Spent 1.06 s on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2018-06-18 12:47:16,587 INFO ]: Checked inductivity of 55 backedges. 1 proven. 39 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-18 12:47:16,608 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 12:47:16,608 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2018-06-18 12:47:16,609 INFO ]: Interpolant automaton has 25 states [2018-06-18 12:47:16,609 INFO ]: Constructing interpolant automaton starting with 25 interpolants. [2018-06-18 12:47:16,609 INFO ]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2018-06-18 12:47:16,609 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 25 states. [2018-06-18 12:47:18,696 WARN ]: Spent 2.00 s on a formula simplification. DAG size of input: 232 DAG size of output: 136 [2018-06-18 12:47:19,011 WARN ]: Spent 202.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 42 [2018-06-18 12:47:19,314 WARN ]: Spent 236.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 44 [2018-06-18 12:47:19,934 WARN ]: Spent 395.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 42 [2018-06-18 12:47:20,538 WARN ]: Spent 517.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 62 [2018-06-18 12:47:22,232 WARN ]: Spent 1.59 s on a formula simplification. DAG size of input: 226 DAG size of output: 122 [2018-06-18 12:47:24,150 WARN ]: Spent 1.81 s on a formula simplification. DAG size of input: 219 DAG size of output: 127 [2018-06-18 12:47:24,238 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 12:47:24,238 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-18 12:47:24,239 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-18 12:47:24,239 INFO ]: Start accepts. Automaton has 25 states. Word has length 29 [2018-06-18 12:47:24,239 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 12:47:24,240 INFO ]: With dead ends: 25 [2018-06-18 12:47:24,240 INFO ]: Without dead ends: 25 [2018-06-18 12:47:24,240 INFO ]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=222, Invalid=834, Unknown=0, NotChecked=0, Total=1056 [2018-06-18 12:47:24,241 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-18 12:47:24,244 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-18 12:47:24,244 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-18 12:47:24,245 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-18 12:47:24,245 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 29 [2018-06-18 12:47:24,245 INFO ]: Finished accepts. word is rejected. [2018-06-18 12:47:24,245 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-18 12:47:24,245 INFO ]: Interpolant automaton has 25 states. [2018-06-18 12:47:24,245 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-18 12:47:24,246 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-18 12:47:24,246 INFO ]: Found error trace [2018-06-18 12:47:24,246 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:47:24,246 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:47:24,246 INFO ]: Analyzing trace with hash -411423458, now seen corresponding path program 6 times [2018-06-18 12:47:24,246 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:47:24,246 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:47:24,247 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:47:24,247 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 12:47:24,247 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:47:25,223 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:47:25,224 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:47:25,903 WARN ]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-18 12:47:27,139 WARN ]: Spent 1.19 s on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2018-06-18 12:47:27,597 WARN ]: Spent 373.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 69 [2018-06-18 12:47:28,458 WARN ]: Spent 778.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 93 [2018-06-18 12:47:29,294 WARN ]: Spent 797.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 91 [2018-06-18 12:47:29,757 WARN ]: Spent 425.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 63 [2018-06-18 12:47:30,297 WARN ]: Spent 212.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 36 [2018-06-18 12:47:30,672 WARN ]: Spent 332.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 38 [2018-06-18 12:47:30,823 WARN ]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2018-06-18 12:47:30,955 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-18 12:47:30,955 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 12:47:30,956 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 [2018-06-18 12:47:30,972 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-18 12:47:31,233 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-06-18 12:47:31,233 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:47:31,254 INFO ]: Computing forward predicates... [2018-06-18 12:47:31,853 WARN ]: Spent 514.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2018-06-18 12:47:32,924 WARN ]: Spent 979.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2018-06-18 12:47:34,071 WARN ]: Spent 1.04 s on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2018-06-18 12:47:35,879 WARN ]: Spent 1.69 s on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2018-06-18 12:47:37,877 WARN ]: Spent 1.20 s on a formula simplification. DAG size of input: 89 DAG size of output: 76 Received shutdown request... [2018-06-18 12:47:39,714 WARN ]: Removed 22 from assertion stack [2018-06-18 12:47:39,714 INFO ]: Timeout while computing interpolants [2018-06-18 12:47:39,915 WARN ]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 12:47:39,915 WARN ]: Verification canceled [2018-06-18 12:47:39,920 WARN ]: Timeout [2018-06-18 12:47:39,920 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.06 12:47:39 BoogieIcfgContainer [2018-06-18 12:47:39,920 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-18 12:47:39,922 INFO ]: Toolchain (without parser) took 56468.76 ms. Allocated memory was 307.8 MB in the beginning and 1.6 GB in the end (delta: 1.3 GB). Free memory was 238.4 MB in the beginning and 467.4 MB in the end (delta: -229.1 MB). Peak memory consumption was 1.1 GB. Max. memory is 3.6 GB. [2018-06-18 12:47:39,923 INFO ]: SmtParser took 0.06 ms. Allocated memory is still 307.8 MB. Free memory is still 273.4 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 12:47:39,923 INFO ]: ChcToBoogie took 1936.37 ms. Allocated memory was 307.8 MB in the beginning and 613.9 MB in the end (delta: 306.2 MB). Free memory was 238.4 MB in the beginning and 253.1 MB in the end (delta: -14.7 MB). Peak memory consumption was 455.2 MB. Max. memory is 3.6 GB. [2018-06-18 12:47:39,924 INFO ]: Boogie Preprocessor took 343.00 ms. Allocated memory is still 613.9 MB. Free memory was 253.1 MB in the beginning and 215.6 MB in the end (delta: 37.4 MB). Peak memory consumption was 37.4 MB. Max. memory is 3.6 GB. [2018-06-18 12:47:39,924 INFO ]: RCFGBuilder took 2440.64 ms. Allocated memory was 613.9 MB in the beginning and 945.3 MB in the end (delta: 331.4 MB). Free memory was 215.6 MB in the beginning and 467.9 MB in the end (delta: -252.3 MB). Peak memory consumption was 182.2 MB. Max. memory is 3.6 GB. [2018-06-18 12:47:39,924 INFO ]: TraceAbstraction took 51739.41 ms. Allocated memory was 945.3 MB in the beginning and 1.6 GB in the end (delta: 670.6 MB). Free memory was 467.9 MB in the beginning and 467.4 MB in the end (delta: 466.4 kB). Peak memory consumption was 671.0 MB. Max. memory is 3.6 GB. [2018-06-18 12:47:39,928 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.06 ms. Allocated memory is still 307.8 MB. Free memory is still 273.4 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 1936.37 ms. Allocated memory was 307.8 MB in the beginning and 613.9 MB in the end (delta: 306.2 MB). Free memory was 238.4 MB in the beginning and 253.1 MB in the end (delta: -14.7 MB). Peak memory consumption was 455.2 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 343.00 ms. Allocated memory is still 613.9 MB. Free memory was 253.1 MB in the beginning and 215.6 MB in the end (delta: 37.4 MB). Peak memory consumption was 37.4 MB. Max. memory is 3.6 GB. * RCFGBuilder took 2440.64 ms. Allocated memory was 613.9 MB in the beginning and 945.3 MB in the end (delta: 331.4 MB). Free memory was 215.6 MB in the beginning and 467.9 MB in the end (delta: -252.3 MB). Peak memory consumption was 182.2 MB. Max. memory is 3.6 GB. * TraceAbstraction took 51739.41 ms. Allocated memory was 945.3 MB in the beginning and 1.6 GB in the end (delta: 670.6 MB). Free memory was 467.9 MB in the beginning and 467.4 MB in the end (delta: 466.4 kB). Peak memory consumption was 671.0 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 analyzing trace of length 38 with TraceHistMax 8, while TraceCheckSpWp was constructing forward predicates, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 95. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 51.6s OverallTime, 7 OverallIterations, 8 TraceHistogramMax, 14.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 71 SDtfs, 153 SDslu, 376 SDs, 0 SdLazy, 297 SolverSat, 195 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 181 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 27.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=6, 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, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 19.9s InterpolantComputationTime, 219 NumberOfCodeBlocks, 219 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 208 ConstructedInterpolants, 0 QuantifiedInterpolants, 143424 SizeOfPredicates, 1523 NumberOfNonLiveVariables, 2005 ConjunctsInSsa, 138 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 71/250 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/kundu-bug-1.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-18_12-47-39-938.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/kundu-bug-1.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-18_12-47-39-938.csv Completed graceful shutdown