java -Xss4m -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/ctigar/up3.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 13:42:26,078 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 13:42:26,080 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 13:42:26,094 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 13:42:26,094 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 13:42:26,095 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 13:42:26,098 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 13:42:26,100 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 13:42:26,102 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 13:42:26,103 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 13:42:26,105 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 13:42:26,105 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 13:42:26,106 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 13:42:26,107 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 13:42:26,107 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 13:42:26,110 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 13:42:26,111 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 13:42:26,113 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 13:42:26,115 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 13:42:26,115 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 13:42:26,116 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 13:42:26,119 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 13:42:26,119 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 13:42:26,119 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 13:42:26,120 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 13:42:26,121 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 13:42:26,121 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 13:42:26,122 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 13:42:26,123 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 13:42:26,123 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 13:42:26,124 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 13:42:26,125 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 13:42:26,125 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 13:42:26,126 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 13:42:26,126 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 13:42:26,126 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 13:42:26,148 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 13:42:26,149 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 13:42:26,149 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 13:42:26,149 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 13:42:26,150 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 13:42:26,150 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 13:42:26,150 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 13:42:26,151 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 13:42:26,154 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 13:42:26,155 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 13:42:26,155 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 13:42:26,155 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 13:42:26,155 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 13:42:26,155 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 13:42:26,156 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 13:42:26,156 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 13:42:26,156 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 13:42:26,156 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 13:42:26,156 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 13:42:26,156 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 13:42:26,157 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 13:42:26,159 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 13:42:26,159 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 13:42:26,216 INFO ]: Repository-Root is: /tmp [2018-06-25 13:42:26,229 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 13:42:26,232 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 13:42:26,237 INFO ]: Initializing SmtParser... [2018-06-25 13:42:26,237 INFO ]: SmtParser initialized [2018-06-25 13:42:26,238 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/up3.c.smt2 [2018-06-25 13:42:26,239 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-25 13:42:26,329 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/up3.c.smt2 unknown [2018-06-25 13:42:26,620 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/up3.c.smt2 [2018-06-25 13:42:26,628 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 13:42:26,633 INFO ]: Walking toolchain with 4 elements. [2018-06-25 13:42:26,634 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 13:42:26,634 INFO ]: Initializing ChcToBoogie... [2018-06-25 13:42:26,634 INFO ]: ChcToBoogie initialized [2018-06-25 13:42:26,637 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:42:26" (1/1) ... [2018-06-25 13:42:26,696 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:42:26 Unit [2018-06-25 13:42:26,696 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 13:42:26,697 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 13:42:26,697 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 13:42:26,697 INFO ]: Boogie Preprocessor initialized [2018-06-25 13:42:26,721 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:42:26" (1/1) ... [2018-06-25 13:42:26,721 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:42:26" (1/1) ... [2018-06-25 13:42:26,728 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:42:26" (1/1) ... [2018-06-25 13:42:26,728 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:42:26" (1/1) ... [2018-06-25 13:42:26,732 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:42:26" (1/1) ... [2018-06-25 13:42:26,734 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:42:26" (1/1) ... [2018-06-25 13:42:26,735 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:42:26" (1/1) ... [2018-06-25 13:42:26,738 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 13:42:26,738 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 13:42:26,738 INFO ]: Initializing RCFGBuilder... [2018-06-25 13:42:26,738 INFO ]: RCFGBuilder initialized [2018-06-25 13:42:26,739 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:42:26" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-25 13:42:26,756 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 13:42:26,756 INFO ]: Found specification of procedure gotoProc [2018-06-25 13:42:26,756 INFO ]: Found implementation of procedure gotoProc [2018-06-25 13:42:26,756 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 13:42:26,756 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 13:42:26,756 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 13:42:26,946 INFO ]: Using library mode [2018-06-25 13:42:26,946 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:42:26 BoogieIcfgContainer [2018-06-25 13:42:26,946 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 13:42:26,947 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 13:42:26,948 INFO ]: Initializing TraceAbstraction... [2018-06-25 13:42:26,951 INFO ]: TraceAbstraction initialized [2018-06-25 13:42:26,951 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:42:26" (1/3) ... [2018-06-25 13:42:26,952 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bbc3e17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 01:42:26, skipping insertion in model container [2018-06-25 13:42:26,952 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:42:26" (2/3) ... [2018-06-25 13:42:26,952 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bbc3e17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 01:42:26, skipping insertion in model container [2018-06-25 13:42:26,952 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:42:26" (3/3) ... [2018-06-25 13:42:26,954 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 13:42:26,973 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 13:42:26,981 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 13:42:27,035 INFO ]: Using default assertion order modulation [2018-06-25 13:42:27,036 INFO ]: Interprodecural is true [2018-06-25 13:42:27,036 INFO ]: Hoare is false [2018-06-25 13:42:27,036 INFO ]: Compute interpolants for FPandBP [2018-06-25 13:42:27,036 INFO ]: Backedges is TWOTRACK [2018-06-25 13:42:27,036 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 13:42:27,036 INFO ]: Difference is false [2018-06-25 13:42:27,036 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 13:42:27,036 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 13:42:27,053 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 13:42:27,064 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 13:42:27,064 INFO ]: Found error trace [2018-06-25 13:42:27,065 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:42:27,065 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:42:27,070 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-25 13:42:27,072 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:42:27,072 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:42:27,117 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:42:27,117 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:42:27,117 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:42:27,153 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:42:27,208 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:42:27,209 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 13:42:27,209 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 13:42:27,211 INFO ]: Interpolant automaton has 3 states [2018-06-25 13:42:27,221 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 13:42:27,221 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 13:42:27,223 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 13:42:27,279 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:42:27,279 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 13:42:27,279 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 13:42:27,280 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 13:42:27,280 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:42:27,287 INFO ]: With dead ends: 9 [2018-06-25 13:42:27,287 INFO ]: Without dead ends: 9 [2018-06-25 13:42:27,288 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 13:42:27,301 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 13:42:27,315 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 13:42:27,316 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 13:42:27,316 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 13:42:27,317 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 13:42:27,317 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:42:27,318 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 13:42:27,318 INFO ]: Interpolant automaton has 3 states. [2018-06-25 13:42:27,318 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 13:42:27,318 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 13:42:27,318 INFO ]: Found error trace [2018-06-25 13:42:27,318 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:42:27,318 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:42:27,318 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-25 13:42:27,318 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:42:27,318 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:42:27,319 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:42:27,319 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:42:27,319 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:42:27,343 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:42:27,444 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:42:27,444 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:42:27,444 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:42:27,451 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:42:27,488 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:42:27,499 INFO ]: Computing forward predicates... [2018-06-25 13:42:27,613 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:42:27,642 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:42:27,642 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 13:42:27,643 INFO ]: Interpolant automaton has 5 states [2018-06-25 13:42:27,643 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 13:42:27,643 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-25 13:42:27,643 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-25 13:42:27,686 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:42:27,686 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-25 13:42:27,690 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-25 13:42:27,690 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-25 13:42:27,690 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:42:27,690 INFO ]: With dead ends: 10 [2018-06-25 13:42:27,690 INFO ]: Without dead ends: 10 [2018-06-25 13:42:27,691 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-25 13:42:27,691 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-25 13:42:27,692 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-25 13:42:27,692 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-25 13:42:27,693 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-25 13:42:27,693 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-25 13:42:27,693 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:42:27,693 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-25 13:42:27,693 INFO ]: Interpolant automaton has 5 states. [2018-06-25 13:42:27,693 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-25 13:42:27,693 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-25 13:42:27,693 INFO ]: Found error trace [2018-06-25 13:42:27,693 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:42:27,693 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:42:27,694 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-25 13:42:27,694 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:42:27,694 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:42:27,695 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:42:27,695 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:42:27,695 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:42:27,764 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:42:28,034 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:42:28,034 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:42:28,034 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:42:28,040 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 13:42:28,080 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 13:42:28,080 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:42:28,083 INFO ]: Computing forward predicates... [2018-06-25 13:42:28,770 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:42:28,790 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:42:28,790 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-25 13:42:28,790 INFO ]: Interpolant automaton has 6 states [2018-06-25 13:42:28,790 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 13:42:28,790 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-25 13:42:28,791 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-25 13:42:28,833 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:42:28,834 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-25 13:42:28,834 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-25 13:42:28,834 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-25 13:42:28,834 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:42:28,834 INFO ]: With dead ends: 11 [2018-06-25 13:42:28,834 INFO ]: Without dead ends: 11 [2018-06-25 13:42:28,835 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-06-25 13:42:28,835 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-25 13:42:28,837 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-25 13:42:28,837 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-25 13:42:28,837 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-25 13:42:28,837 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-25 13:42:28,837 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:42:28,837 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-25 13:42:28,837 INFO ]: Interpolant automaton has 6 states. [2018-06-25 13:42:28,837 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-25 13:42:28,838 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-25 13:42:28,838 INFO ]: Found error trace [2018-06-25 13:42:28,838 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:42:28,838 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:42:28,838 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 3 times [2018-06-25 13:42:28,838 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:42:28,838 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:42:28,839 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:42:28,839 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:42:28,839 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:42:28,890 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:42:29,200 WARN ]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-25 13:42:29,201 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:42:29,201 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:42:29,201 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:42:29,219 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 13:42:29,301 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 13:42:29,301 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:42:29,305 INFO ]: Computing forward predicates... [2018-06-25 13:42:29,991 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:42:30,013 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:42:30,014 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-25 13:42:30,014 INFO ]: Interpolant automaton has 7 states [2018-06-25 13:42:30,014 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-25 13:42:30,014 INFO ]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-06-25 13:42:30,014 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-06-25 13:42:30,079 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:42:30,079 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-25 13:42:30,080 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-25 13:42:30,080 INFO ]: Start accepts. Automaton has 7 states. Word has length 10 [2018-06-25 13:42:30,080 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:42:30,080 INFO ]: With dead ends: 13 [2018-06-25 13:42:30,080 INFO ]: Without dead ends: 13 [2018-06-25 13:42:30,081 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2018-06-25 13:42:30,081 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-25 13:42:30,082 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-25 13:42:30,082 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-25 13:42:30,082 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-25 13:42:30,082 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-06-25 13:42:30,083 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:42:30,083 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-25 13:42:30,083 INFO ]: Interpolant automaton has 7 states. [2018-06-25 13:42:30,083 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-25 13:42:30,083 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-25 13:42:30,083 INFO ]: Found error trace [2018-06-25 13:42:30,083 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:42:30,083 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:42:30,083 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 4 times [2018-06-25 13:42:30,083 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:42:30,083 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:42:30,084 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:42:30,084 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:42:30,084 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:42:30,168 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:42:30,462 WARN ]: Spent 100.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2018-06-25 13:42:30,584 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:42:30,584 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:42:30,584 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:42:30,590 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-25 13:42:30,644 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-25 13:42:30,644 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:42:30,648 INFO ]: Computing forward predicates... [2018-06-25 13:42:35,563 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:42:35,596 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:42:35,596 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2018-06-25 13:42:35,597 INFO ]: Interpolant automaton has 10 states [2018-06-25 13:42:35,597 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-25 13:42:35,597 INFO ]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-06-25 13:42:35,597 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 10 states. [2018-06-25 13:42:35,948 WARN ]: Spent 249.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 12 [2018-06-25 13:42:36,251 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:42:36,251 INFO ]: Finished difference Result 14 states and 14 transitions. [2018-06-25 13:42:36,251 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-25 13:42:36,251 INFO ]: Start accepts. Automaton has 10 states. Word has length 12 [2018-06-25 13:42:36,251 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:42:36,252 INFO ]: With dead ends: 14 [2018-06-25 13:42:36,252 INFO ]: Without dead ends: 14 [2018-06-25 13:42:36,252 INFO ]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2018-06-25 13:42:36,252 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-25 13:42:36,256 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-06-25 13:42:36,256 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-25 13:42:36,257 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-06-25 13:42:36,257 INFO ]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-06-25 13:42:36,257 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:42:36,257 INFO ]: Abstraction has 14 states and 14 transitions. [2018-06-25 13:42:36,257 INFO ]: Interpolant automaton has 10 states. [2018-06-25 13:42:36,257 INFO ]: Start isEmpty. Operand 14 states and 14 transitions. [2018-06-25 13:42:36,257 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-25 13:42:36,257 INFO ]: Found error trace [2018-06-25 13:42:36,257 INFO ]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:42:36,257 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:42:36,257 INFO ]: Analyzing trace with hash 23503628, now seen corresponding path program 5 times [2018-06-25 13:42:36,257 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:42:36,257 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:42:36,258 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:42:36,258 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:42:36,258 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:42:36,310 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:42:37,227 WARN ]: Spent 548.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-06-25 13:42:37,248 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:42:37,248 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:42:37,248 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:42:37,255 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-25 13:42:37,297 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-25 13:42:37,297 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:42:37,301 INFO ]: Computing forward predicates... [2018-06-25 13:42:47,786 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:42:47,816 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:42:47,816 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2018-06-25 13:42:47,816 INFO ]: Interpolant automaton has 12 states [2018-06-25 13:42:47,816 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-25 13:42:47,817 INFO ]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-06-25 13:42:47,817 INFO ]: Start difference. First operand 14 states and 14 transitions. Second operand 12 states. [2018-06-25 13:42:48,086 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:42:48,086 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-25 13:42:48,086 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-25 13:42:48,086 INFO ]: Start accepts. Automaton has 12 states. Word has length 13 [2018-06-25 13:42:48,086 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:42:48,087 INFO ]: With dead ends: 15 [2018-06-25 13:42:48,087 INFO ]: Without dead ends: 15 [2018-06-25 13:42:48,087 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2018-06-25 13:42:48,087 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-25 13:42:48,089 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-25 13:42:48,089 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-25 13:42:48,089 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-06-25 13:42:48,089 INFO ]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-06-25 13:42:48,089 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:42:48,089 INFO ]: Abstraction has 15 states and 15 transitions. [2018-06-25 13:42:48,089 INFO ]: Interpolant automaton has 12 states. [2018-06-25 13:42:48,089 INFO ]: Start isEmpty. Operand 15 states and 15 transitions. [2018-06-25 13:42:48,090 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-25 13:42:48,090 INFO ]: Found error trace [2018-06-25 13:42:48,091 INFO ]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:42:48,091 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:42:48,091 INFO ]: Analyzing trace with hash 726730004, now seen corresponding path program 6 times [2018-06-25 13:42:48,091 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:42:48,091 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:42:48,094 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:42:48,094 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:42:48,094 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:42:48,189 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:42:48,897 WARN ]: Spent 467.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-25 13:42:49,066 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:42:49,066 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:42:49,067 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 [2018-06-25 13:42:49,083 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-25 13:42:49,142 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-06-25 13:42:49,142 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:42:49,146 INFO ]: Computing forward predicates... [2018-06-25 13:42:49,519 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:42:52,133 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:42:52,153 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:42:52,153 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2018-06-25 13:42:52,153 INFO ]: Interpolant automaton has 12 states [2018-06-25 13:42:52,153 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-25 13:42:52,153 INFO ]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2018-06-25 13:42:52,153 INFO ]: Start difference. First operand 15 states and 15 transitions. Second operand 12 states. [2018-06-25 13:42:52,498 WARN ]: Spent 137.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2018-06-25 13:42:52,615 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:42:52,615 INFO ]: Finished difference Result 16 states and 16 transitions. [2018-06-25 13:42:52,615 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-25 13:42:52,615 INFO ]: Start accepts. Automaton has 12 states. Word has length 14 [2018-06-25 13:42:52,615 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:42:52,616 INFO ]: With dead ends: 16 [2018-06-25 13:42:52,616 INFO ]: Without dead ends: 16 [2018-06-25 13:42:52,616 INFO ]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2018-06-25 13:42:52,616 INFO ]: Start minimizeSevpa. Operand 16 states. [2018-06-25 13:42:52,617 INFO ]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-06-25 13:42:52,617 INFO ]: Start removeUnreachable. Operand 16 states. [2018-06-25 13:42:52,618 INFO ]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-06-25 13:42:52,618 INFO ]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-06-25 13:42:52,618 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:42:52,618 INFO ]: Abstraction has 16 states and 16 transitions. [2018-06-25 13:42:52,618 INFO ]: Interpolant automaton has 12 states. [2018-06-25 13:42:52,618 INFO ]: Start isEmpty. Operand 16 states and 16 transitions. [2018-06-25 13:42:52,618 INFO ]: Finished isEmpty. Found accepting run of length 16 [2018-06-25 13:42:52,618 INFO ]: Found error trace [2018-06-25 13:42:52,618 INFO ]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:42:52,619 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:42:52,619 INFO ]: Analyzing trace with hash 1051911180, now seen corresponding path program 7 times [2018-06-25 13:42:52,619 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:42:52,619 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:42:52,619 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:42:52,619 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:42:52,619 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:42:52,676 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:42:52,912 WARN ]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-25 13:42:53,213 INFO ]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:42:53,213 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:42:53,213 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:42:53,221 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:42:53,273 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:42:53,276 INFO ]: Computing forward predicates... [2018-06-25 13:42:57,287 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:42:59,558 INFO ]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:42:59,577 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:42:59,577 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2018-06-25 13:42:59,577 INFO ]: Interpolant automaton has 15 states [2018-06-25 13:42:59,577 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-25 13:42:59,578 INFO ]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2018-06-25 13:42:59,578 INFO ]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-06-25 13:42:59,986 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:42:59,986 INFO ]: Finished difference Result 17 states and 17 transitions. [2018-06-25 13:42:59,986 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-25 13:42:59,986 INFO ]: Start accepts. Automaton has 15 states. Word has length 15 [2018-06-25 13:42:59,986 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:42:59,986 INFO ]: With dead ends: 17 [2018-06-25 13:42:59,986 INFO ]: Without dead ends: 17 [2018-06-25 13:42:59,987 INFO ]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2018-06-25 13:42:59,987 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-25 13:42:59,988 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-25 13:42:59,988 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-25 13:42:59,988 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-06-25 13:42:59,988 INFO ]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-06-25 13:42:59,988 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:42:59,988 INFO ]: Abstraction has 17 states and 17 transitions. [2018-06-25 13:42:59,988 INFO ]: Interpolant automaton has 15 states. [2018-06-25 13:42:59,988 INFO ]: Start isEmpty. Operand 17 states and 17 transitions. [2018-06-25 13:42:59,989 INFO ]: Finished isEmpty. Found accepting run of length 17 [2018-06-25 13:42:59,989 INFO ]: Found error trace [2018-06-25 13:42:59,989 INFO ]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:42:59,989 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:42:59,989 INFO ]: Analyzing trace with hash -1752374252, now seen corresponding path program 8 times [2018-06-25 13:42:59,989 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:42:59,989 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:42:59,990 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:42:59,990 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:42:59,990 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:43:00,071 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:43:00,453 WARN ]: Spent 131.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-06-25 13:43:00,698 INFO ]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:43:00,698 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:43:00,698 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:43:00,704 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 13:43:00,754 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 13:43:00,754 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:43:00,759 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-25 13:43:33,596 INFO ]: Timeout while computing interpolants [2018-06-25 13:43:33,797 WARN ]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:43:33,797 WARN ]: Verification canceled [2018-06-25 13:43:33,801 WARN ]: Timeout [2018-06-25 13:43:33,801 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 01:43:33 BoogieIcfgContainer [2018-06-25 13:43:33,801 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 13:43:33,802 INFO ]: Toolchain (without parser) took 67173.53 ms. Allocated memory was 307.2 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 261.6 MB in the beginning and 506.4 MB in the end (delta: -244.8 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 13:43:33,803 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 307.2 MB. Free memory is still 272.7 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 13:43:33,803 INFO ]: ChcToBoogie took 62.64 ms. Allocated memory is still 307.2 MB. Free memory was 260.6 MB in the beginning and 258.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:43:33,803 INFO ]: Boogie Preprocessor took 40.62 ms. Allocated memory is still 307.2 MB. Free memory was 258.6 MB in the beginning and 257.6 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-25 13:43:33,804 INFO ]: RCFGBuilder took 208.12 ms. Allocated memory is still 307.2 MB. Free memory was 257.6 MB in the beginning and 248.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:43:33,804 INFO ]: TraceAbstraction took 66853.54 ms. Allocated memory was 307.2 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 248.6 MB in the beginning and 506.7 MB in the end (delta: -258.1 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 13:43:33,808 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 307.2 MB. Free memory is still 272.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 62.64 ms. Allocated memory is still 307.2 MB. Free memory was 260.6 MB in the beginning and 258.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 40.62 ms. Allocated memory is still 307.2 MB. Free memory was 258.6 MB in the beginning and 257.6 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 208.12 ms. Allocated memory is still 307.2 MB. Free memory was 257.6 MB in the beginning and 248.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 66853.54 ms. Allocated memory was 307.2 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 248.6 MB in the beginning and 506.7 MB in the end (delta: -258.1 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 17 with TraceHistMax 9, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 16 quantified variables from 18 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 66.7s OverallTime, 9 OverallIterations, 9 TraceHistogramMax, 2.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 56 SDtfs, 21 SDslu, 182 SDs, 0 SdLazy, 72 SolverSat, 51 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 165 GetRequests, 53 SyntacticMatches, 23 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 5.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 29.6s InterpolantComputationTime, 169 NumberOfCodeBlocks, 169 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 154 ConstructedInterpolants, 0 QuantifiedInterpolants, 10784 SizeOfPredicates, 28 NumberOfNonLiveVariables, 1261 ConjunctsInSsa, 275 ConjunctsInUnsatCore, 15 InterpolantComputations, 1 PerfectInterpolantSequences, 0/220 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/up3.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-25_13-43-33-822.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/up3.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_13-43-33-822.csv Completed graceful shutdown