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/array_max-5.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 13:57:01,093 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 13:57:01,095 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 13:57:01,107 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 13:57:01,107 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 13:57:01,108 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 13:57:01,110 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 13:57:01,113 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 13:57:01,114 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 13:57:01,116 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 13:57:01,119 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 13:57:01,119 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 13:57:01,120 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 13:57:01,121 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 13:57:01,121 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 13:57:01,125 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 13:57:01,127 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 13:57:01,140 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 13:57:01,141 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 13:57:01,142 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 13:57:01,143 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 13:57:01,145 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 13:57:01,145 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 13:57:01,146 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 13:57:01,146 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 13:57:01,147 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 13:57:01,153 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 13:57:01,153 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 13:57:01,154 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 13:57:01,155 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 13:57:01,155 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 13:57:01,156 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 13:57:01,156 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 13:57:01,157 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 13:57:01,157 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 13:57:01,158 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 13:57:01,170 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 13:57:01,170 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 13:57:01,171 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 13:57:01,171 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 13:57:01,172 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 13:57:01,172 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 13:57:01,172 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 13:57:01,173 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 13:57:01,173 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 13:57:01,173 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 13:57:01,173 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 13:57:01,173 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 13:57:01,173 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 13:57:01,174 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 13:57:01,174 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 13:57:01,174 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 13:57:01,174 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 13:57:01,174 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 13:57:01,174 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 13:57:01,176 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 13:57:01,176 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 13:57:01,217 INFO ]: Repository-Root is: /tmp [2018-06-22 13:57:01,234 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 13:57:01,239 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 13:57:01,241 INFO ]: Initializing SmtParser... [2018-06-22 13:57:01,241 INFO ]: SmtParser initialized [2018-06-22 13:57:01,242 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/array_max-5.smt2 [2018-06-22 13:57:01,244 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 13:57:01,331 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/array_max-5.smt2 unknown [2018-06-22 13:57:01,857 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/array_max-5.smt2 [2018-06-22 13:57:01,862 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 13:57:01,877 INFO ]: Walking toolchain with 4 elements. [2018-06-22 13:57:01,878 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 13:57:01,878 INFO ]: Initializing ChcToBoogie... [2018-06-22 13:57:01,878 INFO ]: ChcToBoogie initialized [2018-06-22 13:57:01,890 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 01:57:01" (1/1) ... [2018-06-22 13:57:01,964 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:57:01 Unit [2018-06-22 13:57:01,964 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 13:57:01,965 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 13:57:01,965 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 13:57:01,965 INFO ]: Boogie Preprocessor initialized [2018-06-22 13:57:01,985 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:57:01" (1/1) ... [2018-06-22 13:57:01,986 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:57:01" (1/1) ... [2018-06-22 13:57:01,998 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:57:01" (1/1) ... [2018-06-22 13:57:01,999 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:57:01" (1/1) ... [2018-06-22 13:57:02,018 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:57:01" (1/1) ... [2018-06-22 13:57:02,019 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:57:01" (1/1) ... [2018-06-22 13:57:02,025 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:57:01" (1/1) ... [2018-06-22 13:57:02,031 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 13:57:02,032 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 13:57:02,032 INFO ]: Initializing RCFGBuilder... [2018-06-22 13:57:02,032 INFO ]: RCFGBuilder initialized [2018-06-22 13:57:02,033 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:57:01" (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 13:57:02,072 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 13:57:02,072 INFO ]: Found specification of procedure False [2018-06-22 13:57:02,072 INFO ]: Found implementation of procedure False [2018-06-22 13:57:02,072 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 13:57:02,072 INFO ]: Found specification of procedure state [2018-06-22 13:57:02,072 INFO ]: Found implementation of procedure state [2018-06-22 13:57:02,072 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 13:57:02,072 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 13:57:02,072 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 13:57:02,444 INFO ]: Using library mode [2018-06-22 13:57:02,444 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 01:57:02 BoogieIcfgContainer [2018-06-22 13:57:02,444 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 13:57:02,446 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 13:57:02,446 INFO ]: Initializing TraceAbstraction... [2018-06-22 13:57:02,449 INFO ]: TraceAbstraction initialized [2018-06-22 13:57:02,449 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 01:57:01" (1/3) ... [2018-06-22 13:57:02,450 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a46a81a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 01:57:02, skipping insertion in model container [2018-06-22 13:57:02,450 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:57:01" (2/3) ... [2018-06-22 13:57:02,451 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a46a81a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 01:57:02, skipping insertion in model container [2018-06-22 13:57:02,451 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 01:57:02" (3/3) ... [2018-06-22 13:57:02,452 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 13:57:02,463 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 13:57:02,474 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 13:57:02,521 INFO ]: Using default assertion order modulation [2018-06-22 13:57:02,521 INFO ]: Interprodecural is true [2018-06-22 13:57:02,521 INFO ]: Hoare is false [2018-06-22 13:57:02,521 INFO ]: Compute interpolants for FPandBP [2018-06-22 13:57:02,521 INFO ]: Backedges is TWOTRACK [2018-06-22 13:57:02,521 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 13:57:02,521 INFO ]: Difference is false [2018-06-22 13:57:02,521 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 13:57:02,522 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 13:57:02,534 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 13:57:02,544 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 13:57:02,544 INFO ]: Found error trace [2018-06-22 13:57:02,544 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 13:57:02,545 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 13:57:02,548 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 13:57:02,550 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 13:57:02,550 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 13:57:02,603 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 13:57:02,603 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 13:57:02,603 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 13:57:02,644 INFO ]: Conjunction of SSA is unsat [2018-06-22 13:57:02,818 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 13:57:02,821 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 13:57:02,821 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 13:57:02,823 INFO ]: Interpolant automaton has 4 states [2018-06-22 13:57:02,840 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 13:57:02,840 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 13:57:02,842 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 13:57:02,958 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 13:57:02,958 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 13:57:02,959 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 13:57:02,959 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 13:57:02,960 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 13:57:02,969 INFO ]: With dead ends: 13 [2018-06-22 13:57:02,969 INFO ]: Without dead ends: 13 [2018-06-22 13:57:02,971 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 13:57:02,988 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 13:57:03,022 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 13:57:03,023 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 13:57:03,025 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 13:57:03,026 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 13:57:03,026 INFO ]: Finished accepts. word is rejected. [2018-06-22 13:57:03,026 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 13:57:03,026 INFO ]: Interpolant automaton has 4 states. [2018-06-22 13:57:03,026 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 13:57:03,028 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 13:57:03,028 INFO ]: Found error trace [2018-06-22 13:57:03,029 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 13:57:03,029 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 13:57:03,029 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 13:57:03,029 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 13:57:03,029 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 13:57:03,030 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 13:57:03,030 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 13:57:03,030 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 13:57:03,194 INFO ]: Conjunction of SSA is unsat [2018-06-22 13:57:03,641 WARN ]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 13:57:03,939 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 13:57:03,939 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 13:57:03,939 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 13:57:03,947 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 13:57:04,026 INFO ]: Conjunction of SSA is unsat [2018-06-22 13:57:04,035 INFO ]: Computing forward predicates... [2018-06-22 13:57:05,591 WARN ]: Spent 307.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2018-06-22 13:57:05,856 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 13:57:05,888 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 13:57:05,888 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 13:57:05,889 INFO ]: Interpolant automaton has 10 states [2018-06-22 13:57:05,889 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 13:57:05,889 INFO ]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-06-22 13:57:05,889 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 10 states. [2018-06-22 13:57:06,372 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 13:57:06,372 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 13:57:06,374 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 13:57:06,374 INFO ]: Start accepts. Automaton has 10 states. Word has length 13 [2018-06-22 13:57:06,374 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 13:57:06,375 INFO ]: With dead ends: 15 [2018-06-22 13:57:06,375 INFO ]: Without dead ends: 15 [2018-06-22 13:57:06,375 INFO ]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2018-06-22 13:57:06,376 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 13:57:06,378 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 13:57:06,378 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 13:57:06,378 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 13:57:06,379 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 13:57:06,379 INFO ]: Finished accepts. word is rejected. [2018-06-22 13:57:06,379 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 13:57:06,379 INFO ]: Interpolant automaton has 10 states. [2018-06-22 13:57:06,379 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 13:57:06,379 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 13:57:06,379 INFO ]: Found error trace [2018-06-22 13:57:06,379 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 13:57:06,379 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 13:57:06,380 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 13:57:06,380 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 13:57:06,380 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 13:57:06,381 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 13:57:06,381 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 13:57:06,381 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 13:57:06,499 INFO ]: Conjunction of SSA is unsat [2018-06-22 13:57:06,803 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 13:57:06,803 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 13:57:06,803 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 13:57:06,811 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 13:57:06,914 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 13:57:06,914 INFO ]: Conjunction of SSA is unsat [2018-06-22 13:57:06,923 INFO ]: Computing forward predicates... [2018-06-22 13:57:08,890 WARN ]: Spent 230.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2018-06-22 13:57:08,959 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 13:57:08,979 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 13:57:08,979 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-06-22 13:57:08,980 INFO ]: Interpolant automaton has 14 states [2018-06-22 13:57:08,980 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-22 13:57:08,980 INFO ]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-06-22 13:57:08,980 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 14 states. [2018-06-22 13:57:09,149 WARN ]: Spent 130.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2018-06-22 13:57:09,444 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 13:57:09,444 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 13:57:09,445 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 13:57:09,445 INFO ]: Start accepts. Automaton has 14 states. Word has length 17 [2018-06-22 13:57:09,446 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 13:57:09,446 INFO ]: With dead ends: 17 [2018-06-22 13:57:09,446 INFO ]: Without dead ends: 17 [2018-06-22 13:57:09,446 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2018-06-22 13:57:09,447 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 13:57:09,450 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 13:57:09,450 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 13:57:09,451 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 13:57:09,451 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 13:57:09,451 INFO ]: Finished accepts. word is rejected. [2018-06-22 13:57:09,451 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 13:57:09,451 INFO ]: Interpolant automaton has 14 states. [2018-06-22 13:57:09,451 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 13:57:09,452 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 13:57:09,452 INFO ]: Found error trace [2018-06-22 13:57:09,452 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 13:57:09,452 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 13:57:09,452 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 13:57:09,452 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 13:57:09,452 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 13:57:09,453 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 13:57:09,453 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 13:57:09,453 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 13:57:09,605 INFO ]: Conjunction of SSA is unsat [2018-06-22 13:57:10,015 WARN ]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 13:57:10,442 WARN ]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-22 13:57:11,089 WARN ]: Spent 570.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2018-06-22 13:57:11,223 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 13:57:11,223 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 13:57:11,223 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) [2018-06-22 13:57:11,239 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 13:57:11,350 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 13:57:11,350 INFO ]: Conjunction of SSA is unsat [2018-06-22 13:57:11,361 INFO ]: Computing forward predicates... [2018-06-22 13:57:12,781 WARN ]: Spent 512.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2018-06-22 13:57:13,629 WARN ]: Spent 468.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2018-06-22 13:57:14,654 WARN ]: Spent 603.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2018-06-22 13:57:14,739 INFO ]: Checked inductivity of 21 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 13:57:14,764 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 13:57:14,764 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-22 13:57:14,764 INFO ]: Interpolant automaton has 17 states [2018-06-22 13:57:14,764 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 13:57:14,764 INFO ]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2018-06-22 13:57:14,764 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-22 13:57:15,369 WARN ]: Spent 564.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 117 [2018-06-22 13:57:15,618 WARN ]: Spent 208.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 20 [2018-06-22 13:57:15,999 WARN ]: Spent 301.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 70 [2018-06-22 13:57:16,564 WARN ]: Spent 532.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 81 [2018-06-22 13:57:17,433 WARN ]: Spent 832.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 114 [2018-06-22 13:57:17,463 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 13:57:17,463 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 13:57:17,464 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 13:57:17,464 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-22 13:57:17,464 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 13:57:17,464 INFO ]: With dead ends: 21 [2018-06-22 13:57:17,464 INFO ]: Without dead ends: 21 [2018-06-22 13:57:17,465 INFO ]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2018-06-22 13:57:17,465 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 13:57:17,471 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 13:57:17,471 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 13:57:17,472 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 13:57:17,472 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 21 [2018-06-22 13:57:17,472 INFO ]: Finished accepts. word is rejected. [2018-06-22 13:57:17,472 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 13:57:17,472 INFO ]: Interpolant automaton has 17 states. [2018-06-22 13:57:17,472 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 13:57:17,473 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 13:57:17,473 INFO ]: Found error trace [2018-06-22 13:57:17,473 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 13:57:17,473 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 13:57:17,473 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 4 times [2018-06-22 13:57:17,473 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 13:57:17,473 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 13:57:17,474 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 13:57:17,474 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 13:57:17,474 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 13:57:17,890 INFO ]: Conjunction of SSA is unsat [2018-06-22 13:57:18,670 WARN ]: Spent 159.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2018-06-22 13:57:18,854 WARN ]: Spent 176.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2018-06-22 13:57:19,171 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 13:57:19,171 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 13:57:19,171 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 13:57:19,177 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 13:57:19,326 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 13:57:19,326 INFO ]: Conjunction of SSA is unsat [2018-06-22 13:57:19,350 INFO ]: Computing forward predicates... [2018-06-22 13:57:20,108 WARN ]: Spent 112.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 17 [2018-06-22 13:57:21,646 WARN ]: Spent 1.17 s on a formula simplification. DAG size of input: 190 DAG size of output: 128 [2018-06-22 13:57:24,427 WARN ]: Spent 2.27 s on a formula simplification. DAG size of input: 259 DAG size of output: 160 [2018-06-22 13:57:26,432 WARN ]: Spent 1.59 s on a formula simplification. DAG size of input: 267 DAG size of output: 149 [2018-06-22 13:57:27,250 WARN ]: Spent 383.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2018-06-22 13:57:30,084 INFO ]: Checked inductivity of 55 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 13:57:30,108 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 13:57:30,108 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2018-06-22 13:57:30,108 INFO ]: Interpolant automaton has 24 states [2018-06-22 13:57:30,108 INFO ]: Constructing interpolant automaton starting with 24 interpolants. [2018-06-22 13:57:30,108 INFO ]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2018-06-22 13:57:30,109 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 24 states. [2018-06-22 13:57:30,996 WARN ]: Spent 826.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 165 [2018-06-22 13:57:31,168 WARN ]: Spent 104.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 26 [2018-06-22 13:57:31,415 WARN ]: Spent 210.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 35 [2018-06-22 13:57:31,577 WARN ]: Spent 119.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 33 [2018-06-22 13:57:31,880 WARN ]: Spent 254.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 68 [2018-06-22 13:57:32,540 WARN ]: Spent 611.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 128 [2018-06-22 13:57:33,321 WARN ]: Spent 726.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 162 [2018-06-22 13:57:33,388 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 13:57:33,388 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 13:57:33,393 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 13:57:33,393 INFO ]: Start accepts. Automaton has 24 states. Word has length 29 [2018-06-22 13:57:33,393 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 13:57:33,394 INFO ]: With dead ends: 25 [2018-06-22 13:57:33,394 INFO ]: Without dead ends: 25 [2018-06-22 13:57:33,395 INFO ]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=238, Invalid=754, Unknown=0, NotChecked=0, Total=992 [2018-06-22 13:57:33,395 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 13:57:33,399 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 13:57:33,399 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 13:57:33,400 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 13:57:33,401 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 29 [2018-06-22 13:57:33,402 INFO ]: Finished accepts. word is rejected. [2018-06-22 13:57:33,402 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 13:57:33,402 INFO ]: Interpolant automaton has 24 states. [2018-06-22 13:57:33,402 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 13:57:33,402 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 13:57:33,402 INFO ]: Found error trace [2018-06-22 13:57:33,403 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 13:57:33,403 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 13:57:33,403 INFO ]: Analyzing trace with hash -1494134477, now seen corresponding path program 5 times [2018-06-22 13:57:33,403 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 13:57:33,403 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 13:57:33,403 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 13:57:33,403 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 13:57:33,404 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 13:57:33,868 INFO ]: Conjunction of SSA is unsat [2018-06-22 13:57:34,725 WARN ]: Spent 206.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 13 [2018-06-22 13:57:34,988 WARN ]: Spent 196.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2018-06-22 13:57:35,239 WARN ]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 24 [2018-06-22 13:57:35,713 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 13:57:35,713 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 13:57:35,713 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 13:57:35,718 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 13:57:35,949 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-06-22 13:57:35,949 INFO ]: Conjunction of SSA is unsat [2018-06-22 13:57:35,970 INFO ]: Computing forward predicates... [2018-06-22 13:57:38,521 WARN ]: Spent 1.47 s on a formula simplification. DAG size of input: 257 DAG size of output: 132 [2018-06-22 13:57:41,940 WARN ]: Spent 2.98 s on a formula simplification. DAG size of input: 374 DAG size of output: 179 [2018-06-22 13:57:42,903 WARN ]: Spent 584.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 101 [2018-06-22 13:57:45,290 WARN ]: Spent 1.78 s on a formula simplification. DAG size of input: 302 DAG size of output: 131 [2018-06-22 13:57:46,582 WARN ]: Spent 876.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 99 [2018-06-22 13:57:47,187 WARN ]: Spent 345.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2018-06-22 13:57:49,235 INFO ]: Checked inductivity of 105 backedges. 6 proven. 71 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 13:57:49,266 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 13:57:49,266 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2018-06-22 13:57:49,267 INFO ]: Interpolant automaton has 29 states [2018-06-22 13:57:49,267 INFO ]: Constructing interpolant automaton starting with 29 interpolants. [2018-06-22 13:57:49,267 INFO ]: CoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2018-06-22 13:57:49,267 INFO ]: Start difference. First operand 25 states and 26 transitions. Second operand 29 states. [2018-06-22 13:57:50,416 WARN ]: Spent 1.04 s on a formula simplification. DAG size of input: 254 DAG size of output: 217 [2018-06-22 13:57:50,649 WARN ]: Spent 160.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 35 [2018-06-22 13:57:50,901 WARN ]: Spent 205.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 33 [2018-06-22 13:57:51,153 WARN ]: Spent 206.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 34 [2018-06-22 13:57:51,405 WARN ]: Spent 206.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 34 [2018-06-22 13:57:51,680 WARN ]: Spent 226.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 40 [2018-06-22 13:57:52,096 WARN ]: Spent 358.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 78 [2018-06-22 13:57:52,939 WARN ]: Spent 754.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 138 [2018-06-22 13:57:53,958 WARN ]: Spent 943.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 209 [2018-06-22 13:57:54,019 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 13:57:54,019 INFO ]: Finished difference Result 29 states and 30 transitions. [2018-06-22 13:57:54,021 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 13:57:54,021 INFO ]: Start accepts. Automaton has 29 states. Word has length 37 [2018-06-22 13:57:54,021 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 13:57:54,022 INFO ]: With dead ends: 29 [2018-06-22 13:57:54,022 INFO ]: Without dead ends: 29 [2018-06-22 13:57:54,023 INFO ]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=357, Invalid=1125, Unknown=0, NotChecked=0, Total=1482 [2018-06-22 13:57:54,023 INFO ]: Start minimizeSevpa. Operand 29 states. [2018-06-22 13:57:54,031 INFO ]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-06-22 13:57:54,031 INFO ]: Start removeUnreachable. Operand 29 states. [2018-06-22 13:57:54,031 INFO ]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-06-22 13:57:54,031 INFO ]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 37 [2018-06-22 13:57:54,032 INFO ]: Finished accepts. word is rejected. [2018-06-22 13:57:54,032 INFO ]: Abstraction has 29 states and 30 transitions. [2018-06-22 13:57:54,032 INFO ]: Interpolant automaton has 29 states. [2018-06-22 13:57:54,032 INFO ]: Start isEmpty. Operand 29 states and 30 transitions. [2018-06-22 13:57:54,033 INFO ]: Finished isEmpty. Found accepting run of length 46 [2018-06-22 13:57:54,033 INFO ]: Found error trace [2018-06-22 13:57:54,033 INFO ]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 13:57:54,033 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 13:57:54,033 INFO ]: Analyzing trace with hash 996918775, now seen corresponding path program 6 times [2018-06-22 13:57:54,033 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 13:57:54,033 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 13:57:54,034 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 13:57:54,034 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 13:57:54,034 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 13:57:54,515 INFO ]: Conjunction of SSA is unsat [2018-06-22 13:57:55,389 WARN ]: Spent 248.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 18 [2018-06-22 13:57:56,234 INFO ]: Checked inductivity of 171 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 13:57:56,234 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 13:57:56,234 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 13:57:56,240 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 13:57:56,785 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-06-22 13:57:56,785 INFO ]: Conjunction of SSA is unsat [2018-06-22 13:57:56,813 INFO ]: Computing forward predicates... [2018-06-22 13:57:58,149 WARN ]: Spent 507.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 93 [2018-06-22 13:57:59,094 WARN ]: Spent 592.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 101 [2018-06-22 13:58:00,593 WARN ]: Spent 1.20 s on a formula simplification. DAG size of input: 196 DAG size of output: 134 Received shutdown request... [2018-06-22 13:58:02,093 WARN ]: Removed 20 from assertion stack [2018-06-22 13:58:02,093 INFO ]: Timeout while computing interpolants [2018-06-22 13:58:02,294 WARN ]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 13:58:02,294 WARN ]: Verification canceled [2018-06-22 13:58:02,299 WARN ]: Timeout [2018-06-22 13:58:02,299 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 01:58:02 BoogieIcfgContainer [2018-06-22 13:58:02,299 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 13:58:02,300 INFO ]: Toolchain (without parser) took 60437.75 ms. Allocated memory was 306.7 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 232.2 MB in the beginning and 1.1 GB in the end (delta: -904.2 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 13:58:02,301 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 306.7 MB. Free memory is still 272.2 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 13:58:02,301 INFO ]: ChcToBoogie took 86.28 ms. Allocated memory is still 306.7 MB. Free memory was 232.2 MB in the beginning and 229.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-22 13:58:02,301 INFO ]: Boogie Preprocessor took 66.58 ms. Allocated memory is still 306.7 MB. Free memory was 229.2 MB in the beginning and 227.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 13:58:02,302 INFO ]: RCFGBuilder took 412.84 ms. Allocated memory is still 306.7 MB. Free memory was 227.2 MB in the beginning and 194.7 MB in the end (delta: 32.5 MB). Peak memory consumption was 32.5 MB. Max. memory is 3.6 GB. [2018-06-22 13:58:02,302 INFO ]: TraceAbstraction took 59852.89 ms. Allocated memory was 306.7 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 194.7 MB in the beginning and 1.1 GB in the end (delta: -941.7 MB). Peak memory consumption was 1.2 GB. Max. memory is 3.6 GB. [2018-06-22 13:58:02,310 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.08 ms. Allocated memory is still 306.7 MB. Free memory is still 272.2 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 86.28 ms. Allocated memory is still 306.7 MB. Free memory was 232.2 MB in the beginning and 229.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 66.58 ms. Allocated memory is still 306.7 MB. Free memory was 229.2 MB in the beginning and 227.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 412.84 ms. Allocated memory is still 306.7 MB. Free memory was 227.2 MB in the beginning and 194.7 MB in the end (delta: 32.5 MB). Peak memory consumption was 32.5 MB. Max. memory is 3.6 GB. * TraceAbstraction took 59852.89 ms. Allocated memory was 306.7 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 194.7 MB in the beginning and 1.1 GB in the end (delta: -941.7 MB). Peak memory consumption was 1.2 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 46 with TraceHistMax 10, while TraceCheckSpWp was constructing forward predicates, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 201. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 59.7s OverallTime, 7 OverallIterations, 10 TraceHistogramMax, 11.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 72 SDtfs, 132 SDslu, 396 SDs, 0 SdLazy, 313 SolverSat, 168 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 204 GetRequests, 79 SyntacticMatches, 7 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 34.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred 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: 0.2s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 37.2s InterpolantComputationTime, 243 NumberOfCodeBlocks, 243 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 232 ConstructedInterpolants, 0 QuantifiedInterpolants, 250136 SizeOfPredicates, 1609 NumberOfNonLiveVariables, 1892 ConjunctsInSsa, 171 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 117/388 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/array_max-5.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_13-58-02-330.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/array_max-5.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_13-58-02-330.csv Completed graceful shutdown