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/cav12/mem_slave_tlm.4.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:08:13,745 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:08:13,748 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:08:13,763 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:08:13,763 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:08:13,765 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:08:13,766 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:08:13,767 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:08:13,769 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:08:13,770 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:08:13,771 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:08:13,771 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:08:13,772 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:08:13,773 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:08:13,773 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:08:13,774 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:08:13,776 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:08:13,778 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:08:13,779 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:08:13,780 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:08:13,781 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:08:13,784 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:08:13,784 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:08:13,784 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:08:13,785 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:08:13,786 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:08:13,787 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:08:13,788 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:08:13,789 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:08:13,789 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:08:13,790 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:08:13,790 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:08:13,791 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:08:13,792 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:08:13,792 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:08:13,792 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 14:08:13,810 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:08:13,810 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:08:13,811 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:08:13,811 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:08:13,812 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:08:13,812 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:08:13,812 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:08:13,812 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:08:13,813 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:08:13,813 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:08:13,813 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:08:13,814 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:08:13,814 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:08:13,814 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:08:13,814 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:08:13,814 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:08:13,815 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:08:13,815 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:08:13,815 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:08:13,816 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:08:13,817 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:08:13,862 INFO ]: Repository-Root is: /tmp [2018-06-22 14:08:13,875 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:08:13,881 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:08:13,883 INFO ]: Initializing SmtParser... [2018-06-22 14:08:13,883 INFO ]: SmtParser initialized [2018-06-22 14:08:13,884 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/mem_slave_tlm.4.smt2 [2018-06-22 14:08:13,886 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 14:08:13,982 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/mem_slave_tlm.4.smt2 unknown [2018-06-22 14:08:14,826 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/mem_slave_tlm.4.smt2 [2018-06-22 14:08:14,833 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:08:14,842 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:08:14,843 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:08:14,843 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:08:14,843 INFO ]: ChcToBoogie initialized [2018-06-22 14:08:14,847 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:08:14" (1/1) ... [2018-06-22 14:08:14,979 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:08:14 Unit [2018-06-22 14:08:14,979 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:08:14,983 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:08:14,983 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:08:14,983 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:08:15,005 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:08:14" (1/1) ... [2018-06-22 14:08:15,005 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:08:14" (1/1) ... [2018-06-22 14:08:15,027 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:08:14" (1/1) ... [2018-06-22 14:08:15,027 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:08:14" (1/1) ... [2018-06-22 14:08:15,066 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:08:14" (1/1) ... [2018-06-22 14:08:15,068 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:08:14" (1/1) ... [2018-06-22 14:08:15,072 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:08:14" (1/1) ... [2018-06-22 14:08:15,085 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:08:15,086 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:08:15,086 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:08:15,086 INFO ]: RCFGBuilder initialized [2018-06-22 14:08:15,087 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:08:14" (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 14:08:15,103 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:08:15,103 INFO ]: Found specification of procedure False [2018-06-22 14:08:15,103 INFO ]: Found implementation of procedure False [2018-06-22 14:08:15,103 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:08:15,103 INFO ]: Found specification of procedure state [2018-06-22 14:08:15,104 INFO ]: Found implementation of procedure state [2018-06-22 14:08:15,104 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:08:15,104 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:08:15,104 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 14:08:15,764 INFO ]: Using library mode [2018-06-22 14:08:15,764 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:08:15 BoogieIcfgContainer [2018-06-22 14:08:15,764 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:08:15,766 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:08:15,766 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:08:15,771 INFO ]: TraceAbstraction initialized [2018-06-22 14:08:15,771 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:08:14" (1/3) ... [2018-06-22 14:08:15,772 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@796754fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:08:15, skipping insertion in model container [2018-06-22 14:08:15,772 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:08:14" (2/3) ... [2018-06-22 14:08:15,773 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@796754fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:08:15, skipping insertion in model container [2018-06-22 14:08:15,773 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:08:15" (3/3) ... [2018-06-22 14:08:15,775 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:08:15,785 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:08:15,798 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:08:15,852 INFO ]: Using default assertion order modulation [2018-06-22 14:08:15,853 INFO ]: Interprodecural is true [2018-06-22 14:08:15,853 INFO ]: Hoare is false [2018-06-22 14:08:15,853 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:08:15,853 INFO ]: Backedges is TWOTRACK [2018-06-22 14:08:15,853 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:08:15,853 INFO ]: Difference is false [2018-06-22 14:08:15,853 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:08:15,853 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:08:15,871 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:08:15,885 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:08:15,885 INFO ]: Found error trace [2018-06-22 14:08:15,886 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:08:15,886 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:08:15,892 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 14:08:15,895 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:08:15,896 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:08:15,950 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:08:15,950 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:08:15,950 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:08:16,004 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:08:16,226 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:08:16,229 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:08:16,229 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:08:16,231 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:08:16,244 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:08:16,244 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:08:16,247 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:08:16,435 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:08:16,436 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:08:16,462 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:08:16,463 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:08:16,463 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:08:16,472 INFO ]: With dead ends: 13 [2018-06-22 14:08:16,472 INFO ]: Without dead ends: 13 [2018-06-22 14:08:16,474 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:08:16,486 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:08:16,516 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:08:16,516 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:08:16,517 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:08:16,518 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:08:16,518 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:08:16,518 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:08:16,518 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:08:16,518 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:08:16,519 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:08:16,519 INFO ]: Found error trace [2018-06-22 14:08:16,519 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:08:16,519 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:08:16,519 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 14:08:16,519 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:08:16,519 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:08:16,520 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:08:16,520 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:08:16,520 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:08:16,713 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:08:17,085 WARN ]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 4 [2018-06-22 14:08:17,290 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:08:17,290 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:08:17,290 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:08:17,304 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:08:17,453 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:08:17,469 INFO ]: Computing forward predicates... [2018-06-22 14:08:19,674 WARN ]: Spent 1.70 s on a formula simplification. DAG size of input: 53 DAG size of output: 35 [2018-06-22 14:08:19,770 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:08:19,792 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:08:19,792 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 14:08:19,792 INFO ]: Interpolant automaton has 9 states [2018-06-22 14:08:19,793 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 14:08:19,793 INFO ]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-06-22 14:08:19,793 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 14:08:20,643 WARN ]: Spent 730.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2018-06-22 14:08:20,817 WARN ]: Spent 107.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 24 [2018-06-22 14:08:20,846 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:08:20,846 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 14:08:20,848 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 14:08:20,848 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 14:08:20,848 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:08:20,849 INFO ]: With dead ends: 15 [2018-06-22 14:08:20,849 INFO ]: Without dead ends: 15 [2018-06-22 14:08:20,850 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-06-22 14:08:20,850 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 14:08:20,853 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 14:08:20,853 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 14:08:20,853 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 14:08:20,853 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 14:08:20,853 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:08:20,853 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 14:08:20,853 INFO ]: Interpolant automaton has 9 states. [2018-06-22 14:08:20,853 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 14:08:20,854 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 14:08:20,854 INFO ]: Found error trace [2018-06-22 14:08:20,854 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:08:20,854 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:08:20,854 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 14:08:20,854 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:08:20,854 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:08:20,855 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:08:20,855 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:08:20,855 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:08:21,068 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:08:21,676 WARN ]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 14:08:21,888 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:08:21,888 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:08:21,888 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 14:08:21,903 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 14:08:22,098 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:08:22,099 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:08:22,112 INFO ]: Computing forward predicates... [2018-06-22 14:08:22,537 WARN ]: Spent 181.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 24 [2018-06-22 14:08:23,700 WARN ]: Spent 966.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2018-06-22 14:08:24,740 WARN ]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 14:08:24,756 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:08:24,788 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:08:24,789 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-06-22 14:08:24,789 INFO ]: Interpolant automaton has 12 states [2018-06-22 14:08:24,789 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 14:08:24,789 INFO ]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-06-22 14:08:24,789 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-06-22 14:08:26,207 WARN ]: Spent 1.13 s on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2018-06-22 14:08:26,750 WARN ]: Spent 411.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 36 [2018-06-22 14:08:26,808 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:08:26,808 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 14:08:26,809 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:08:26,809 INFO ]: Start accepts. Automaton has 12 states. Word has length 17 [2018-06-22 14:08:26,809 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:08:26,810 INFO ]: With dead ends: 17 [2018-06-22 14:08:26,810 INFO ]: Without dead ends: 17 [2018-06-22 14:08:26,810 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2018-06-22 14:08:26,810 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 14:08:26,812 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 14:08:26,812 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 14:08:26,813 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 14:08:26,813 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 14:08:26,813 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:08:26,813 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 14:08:26,813 INFO ]: Interpolant automaton has 12 states. [2018-06-22 14:08:26,813 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 14:08:26,814 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 14:08:26,814 INFO ]: Found error trace [2018-06-22 14:08:26,814 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:08:26,814 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:08:26,814 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 14:08:26,814 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:08:26,814 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:08:26,815 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:08:26,815 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:08:26,815 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:08:26,979 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:08:27,361 WARN ]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 4 [2018-06-22 14:08:27,575 WARN ]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-22 14:08:27,962 WARN ]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2018-06-22 14:08:28,059 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:08:28,059 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:08:28,059 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 14:08:28,071 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 14:08:28,261 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 14:08:28,261 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:08:28,277 INFO ]: Computing forward predicates... [2018-06-22 14:08:29,849 WARN ]: Spent 1.16 s on a formula simplification. DAG size of input: 40 DAG size of output: 24 [2018-06-22 14:08:30,682 WARN ]: Spent 681.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2018-06-22 14:08:31,813 WARN ]: Spent 926.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2018-06-22 14:08:31,965 INFO ]: Checked inductivity of 21 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:08:31,985 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:08:31,985 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2018-06-22 14:08:31,986 INFO ]: Interpolant automaton has 16 states [2018-06-22 14:08:31,986 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 14:08:31,986 INFO ]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2018-06-22 14:08:31,986 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 16 states. [2018-06-22 14:08:32,960 WARN ]: Spent 907.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 79 [2018-06-22 14:08:33,142 WARN ]: Spent 142.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 37 [2018-06-22 14:08:33,298 WARN ]: Spent 127.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 22 [2018-06-22 14:08:33,946 WARN ]: Spent 613.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2018-06-22 14:08:34,003 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:08:34,004 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 14:08:34,004 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 14:08:34,004 INFO ]: Start accepts. Automaton has 16 states. Word has length 21 [2018-06-22 14:08:34,005 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:08:34,005 INFO ]: With dead ends: 19 [2018-06-22 14:08:34,005 INFO ]: Without dead ends: 19 [2018-06-22 14:08:34,005 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2018-06-22 14:08:34,005 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 14:08:34,008 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 14:08:34,008 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 14:08:34,008 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 14:08:34,008 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 14:08:34,009 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:08:34,009 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 14:08:34,009 INFO ]: Interpolant automaton has 16 states. [2018-06-22 14:08:34,009 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 14:08:34,009 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 14:08:34,009 INFO ]: Found error trace [2018-06-22 14:08:34,009 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:08:34,009 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:08:34,010 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-22 14:08:34,010 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:08:34,010 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:08:34,010 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:08:34,010 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:08:34,010 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:08:34,210 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:08:35,020 WARN ]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-06-22 14:08:35,256 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 14:08:35,256 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:08:35,256 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 14:08:35,265 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 14:08:35,580 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 14:08:35,580 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:08:35,600 INFO ]: Computing forward predicates... [2018-06-22 14:08:36,190 WARN ]: Spent 477.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 33 [2018-06-22 14:08:38,333 WARN ]: Spent 1.82 s on a formula simplification. DAG size of input: 107 DAG size of output: 75 [2018-06-22 14:08:40,570 WARN ]: Spent 1.79 s on a formula simplification. DAG size of input: 128 DAG size of output: 119 [2018-06-22 14:08:43,002 WARN ]: Spent 2.26 s on a formula simplification. DAG size of input: 116 DAG size of output: 101 [2018-06-22 14:08:43,279 INFO ]: Checked inductivity of 36 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 14:08:43,309 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:08:43,309 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2018-06-22 14:08:43,309 INFO ]: Interpolant automaton has 20 states [2018-06-22 14:08:43,309 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-22 14:08:43,309 INFO ]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2018-06-22 14:08:43,309 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 20 states. [2018-06-22 14:08:45,206 WARN ]: Spent 1.83 s on a formula simplification. DAG size of input: 157 DAG size of output: 157 [2018-06-22 14:08:45,428 WARN ]: Spent 168.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 37 [2018-06-22 14:08:45,737 WARN ]: Spent 252.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 42 [2018-06-22 14:08:46,451 WARN ]: Spent 624.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 62 [2018-06-22 14:08:47,804 WARN ]: Spent 1.30 s on a formula simplification. DAG size of input: 159 DAG size of output: 145 [2018-06-22 14:08:47,906 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:08:47,906 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 14:08:47,907 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 14:08:47,907 INFO ]: Start accepts. Automaton has 20 states. Word has length 25 [2018-06-22 14:08:47,907 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:08:47,908 INFO ]: With dead ends: 21 [2018-06-22 14:08:47,908 INFO ]: Without dead ends: 21 [2018-06-22 14:08:47,908 INFO ]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2018-06-22 14:08:47,908 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 14:08:47,911 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 14:08:47,911 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 14:08:47,912 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 14:08:47,912 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 14:08:47,912 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:08:47,912 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 14:08:47,912 INFO ]: Interpolant automaton has 20 states. [2018-06-22 14:08:47,912 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 14:08:47,913 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 14:08:47,913 INFO ]: Found error trace [2018-06-22 14:08:47,913 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:08:47,913 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:08:47,914 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 5 times [2018-06-22 14:08:47,914 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:08:47,914 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:08:47,914 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:08:47,914 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:08:47,914 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:08:48,156 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:08:49,024 WARN ]: Spent 349.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2018-06-22 14:08:49,176 WARN ]: Spent 144.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2018-06-22 14:08:49,590 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 14:08:49,590 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:08:49,590 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 14:08:49,597 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 14:08:50,047 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 14:08:50,047 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:08:50,074 INFO ]: Computing forward predicates... [2018-06-22 14:08:50,693 WARN ]: Spent 476.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2018-06-22 14:08:51,798 WARN ]: Spent 904.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2018-06-22 14:08:53,592 WARN ]: Spent 1.68 s on a formula simplification. DAG size of input: 111 DAG size of output: 87 [2018-06-22 14:08:55,543 WARN ]: Spent 1.83 s on a formula simplification. DAG size of input: 128 DAG size of output: 119 [2018-06-22 14:08:57,815 WARN ]: Spent 2.07 s on a formula simplification. DAG size of input: 116 DAG size of output: 101 [2018-06-22 14:08:58,354 INFO ]: Checked inductivity of 55 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 14:08:58,377 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:08:58,377 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2018-06-22 14:08:58,377 INFO ]: Interpolant automaton has 24 states [2018-06-22 14:08:58,377 INFO ]: Constructing interpolant automaton starting with 24 interpolants. [2018-06-22 14:08:58,377 INFO ]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2018-06-22 14:08:58,377 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 24 states. [2018-06-22 14:09:02,168 WARN ]: Spent 3.71 s on a formula simplification. DAG size of input: 163 DAG size of output: 158 [2018-06-22 14:09:02,419 WARN ]: Spent 181.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 37 [2018-06-22 14:09:02,723 WARN ]: Spent 258.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 42 [2018-06-22 14:09:03,239 WARN ]: Spent 394.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 64 [2018-06-22 14:09:03,775 WARN ]: Spent 442.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 53 [2018-06-22 14:09:05,478 WARN ]: Spent 1.64 s on a formula simplification. DAG size of input: 172 DAG size of output: 132 [2018-06-22 14:09:09,094 WARN ]: Spent 3.42 s on a formula simplification. DAG size of input: 164 DAG size of output: 155 [2018-06-22 14:09:09,163 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:09:09,163 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 14:09:09,164 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 14:09:09,164 INFO ]: Start accepts. Automaton has 24 states. Word has length 29 [2018-06-22 14:09:09,164 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:09:09,165 INFO ]: With dead ends: 25 [2018-06-22 14:09:09,165 INFO ]: Without dead ends: 25 [2018-06-22 14:09:09,165 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2018-06-22 14:09:09,166 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 14:09:09,169 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 14:09:09,169 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 14:09:09,170 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 14:09:09,170 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 29 [2018-06-22 14:09:09,171 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:09:09,171 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 14:09:09,171 INFO ]: Interpolant automaton has 24 states. [2018-06-22 14:09:09,171 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 14:09:09,172 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 14:09:09,172 INFO ]: Found error trace [2018-06-22 14:09:09,172 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:09:09,172 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:09:09,172 INFO ]: Analyzing trace with hash -1494134477, now seen corresponding path program 6 times [2018-06-22 14:09:09,172 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:09:09,172 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:09:09,172 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:09:09,172 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:09:09,172 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:09:09,484 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:09:10,333 WARN ]: Spent 168.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2018-06-22 14:09:10,631 WARN ]: Spent 288.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2018-06-22 14:09:10,925 WARN ]: Spent 279.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 73 [2018-06-22 14:09:11,134 WARN ]: Spent 144.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2018-06-22 14:09:11,612 WARN ]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2018-06-22 14:09:11,934 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 14:09:11,934 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:09:11,934 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-22 14:09:11,951 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:09:12,419 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-06-22 14:09:12,419 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:09:12,443 INFO ]: Computing forward predicates... [2018-06-22 14:09:13,483 WARN ]: Spent 914.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 Received shutdown request... [2018-06-22 14:09:13,806 WARN ]: Removed 46 from assertion stack [2018-06-22 14:09:13,806 INFO ]: Timeout while computing interpolants [2018-06-22 14:09:14,007 WARN ]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:09:14,007 WARN ]: Verification canceled [2018-06-22 14:09:14,010 WARN ]: Timeout [2018-06-22 14:09:14,010 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 02:09:14 BoogieIcfgContainer [2018-06-22 14:09:14,010 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 14:09:14,011 INFO ]: Toolchain (without parser) took 59177.32 ms. Allocated memory was 308.8 MB in the beginning and 1.2 GB in the end (delta: 890.2 MB). Free memory was 193.4 MB in the beginning and 460.3 MB in the end (delta: -266.9 MB). Peak memory consumption was 623.3 MB. Max. memory is 3.6 GB. [2018-06-22 14:09:14,012 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 308.8 MB. Free memory is still 274.4 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 14:09:14,012 INFO ]: ChcToBoogie took 136.94 ms. Allocated memory was 308.8 MB in the beginning and 325.1 MB in the end (delta: 16.3 MB). Free memory was 192.4 MB in the beginning and 297.5 MB in the end (delta: -105.1 MB). Peak memory consumption was 7.2 MB. Max. memory is 3.6 GB. [2018-06-22 14:09:14,012 INFO ]: Boogie Preprocessor took 102.41 ms. Allocated memory is still 325.1 MB. Free memory was 297.5 MB in the beginning and 294.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 3.6 GB. [2018-06-22 14:09:14,012 INFO ]: RCFGBuilder took 678.55 ms. Allocated memory is still 325.1 MB. Free memory was 294.4 MB in the beginning and 225.7 MB in the end (delta: 68.8 MB). Peak memory consumption was 68.8 MB. Max. memory is 3.6 GB. [2018-06-22 14:09:14,013 INFO ]: TraceAbstraction took 58244.77 ms. Allocated memory was 325.1 MB in the beginning and 1.2 GB in the end (delta: 874.0 MB). Free memory was 225.7 MB in the beginning and 460.3 MB in the end (delta: -234.7 MB). Peak memory consumption was 639.3 MB. Max. memory is 3.6 GB. [2018-06-22 14:09:14,015 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.08 ms. Allocated memory is still 308.8 MB. Free memory is still 274.4 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 136.94 ms. Allocated memory was 308.8 MB in the beginning and 325.1 MB in the end (delta: 16.3 MB). Free memory was 192.4 MB in the beginning and 297.5 MB in the end (delta: -105.1 MB). Peak memory consumption was 7.2 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 102.41 ms. Allocated memory is still 325.1 MB. Free memory was 297.5 MB in the beginning and 294.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 3.6 GB. * RCFGBuilder took 678.55 ms. Allocated memory is still 325.1 MB. Free memory was 294.4 MB in the beginning and 225.7 MB in the end (delta: 68.8 MB). Peak memory consumption was 68.8 MB. Max. memory is 3.6 GB. * TraceAbstraction took 58244.77 ms. Allocated memory was 325.1 MB in the beginning and 1.2 GB in the end (delta: 874.0 MB). Free memory was 225.7 MB in the beginning and 460.3 MB in the end (delta: -234.7 MB). Peak memory consumption was 639.3 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 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 93. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 58.1s OverallTime, 7 OverallIterations, 8 TraceHistogramMax, 20.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 73 SDtfs, 113 SDslu, 274 SDs, 0 SdLazy, 251 SolverSat, 146 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 176 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 44.3s 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: 0.3s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 29.8s InterpolantComputationTime, 219 NumberOfCodeBlocks, 219 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 208 ConstructedInterpolants, 0 QuantifiedInterpolants, 249072 SizeOfPredicates, 3547 NumberOfNonLiveVariables, 2885 ConjunctsInSsa, 154 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 83/250 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/mem_slave_tlm.4.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_14-09-14-037.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/mem_slave_tlm.4.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_14-09-14-037.csv Completed graceful shutdown