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/up-nested.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 13:44:52,044 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 13:44:52,046 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 13:44:52,062 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 13:44:52,063 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 13:44:52,063 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 13:44:52,067 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 13:44:52,071 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 13:44:52,073 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 13:44:52,074 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 13:44:52,075 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 13:44:52,075 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 13:44:52,083 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 13:44:52,084 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 13:44:52,085 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 13:44:52,085 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 13:44:52,087 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 13:44:52,089 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 13:44:52,090 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 13:44:52,094 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 13:44:52,095 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 13:44:52,097 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 13:44:52,098 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 13:44:52,098 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 13:44:52,099 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 13:44:52,100 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 13:44:52,101 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 13:44:52,101 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 13:44:52,105 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 13:44:52,106 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 13:44:52,106 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 13:44:52,107 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 13:44:52,107 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 13:44:52,108 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 13:44:52,108 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 13:44:52,108 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 13:44:52,124 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 13:44:52,124 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 13:44:52,124 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 13:44:52,124 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 13:44:52,125 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 13:44:52,126 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 13:44:52,126 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 13:44:52,126 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 13:44:52,126 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 13:44:52,126 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 13:44:52,127 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 13:44:52,127 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 13:44:52,127 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 13:44:52,127 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 13:44:52,127 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 13:44:52,128 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 13:44:52,128 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 13:44:52,128 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 13:44:52,128 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 13:44:52,128 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 13:44:52,129 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 13:44:52,130 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 13:44:52,130 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 13:44:52,168 INFO ]: Repository-Root is: /tmp [2018-06-25 13:44:52,185 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 13:44:52,191 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 13:44:52,192 INFO ]: Initializing SmtParser... [2018-06-25 13:44:52,192 INFO ]: SmtParser initialized [2018-06-25 13:44:52,193 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/up-nested.c.smt2 [2018-06-25 13:44:52,194 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 13:44:52,277 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/up-nested.c.smt2 unknown [2018-06-25 13:44:52,534 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/up-nested.c.smt2 [2018-06-25 13:44:52,540 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 13:44:52,544 INFO ]: Walking toolchain with 4 elements. [2018-06-25 13:44:52,545 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 13:44:52,545 INFO ]: Initializing ChcToBoogie... [2018-06-25 13:44:52,545 INFO ]: ChcToBoogie initialized [2018-06-25 13:44:52,548 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:44:52" (1/1) ... [2018-06-25 13:44:52,599 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:44:52 Unit [2018-06-25 13:44:52,599 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 13:44:52,600 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 13:44:52,600 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 13:44:52,600 INFO ]: Boogie Preprocessor initialized [2018-06-25 13:44:52,620 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:44:52" (1/1) ... [2018-06-25 13:44:52,621 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:44:52" (1/1) ... [2018-06-25 13:44:52,627 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:44:52" (1/1) ... [2018-06-25 13:44:52,627 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:44:52" (1/1) ... [2018-06-25 13:44:52,630 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:44:52" (1/1) ... [2018-06-25 13:44:52,632 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:44:52" (1/1) ... [2018-06-25 13:44:52,633 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:44:52" (1/1) ... [2018-06-25 13:44:52,635 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 13:44:52,635 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 13:44:52,635 INFO ]: Initializing RCFGBuilder... [2018-06-25 13:44:52,636 INFO ]: RCFGBuilder initialized [2018-06-25 13:44:52,636 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:44:52" (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 13:44:52,646 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 13:44:52,646 INFO ]: Found specification of procedure gotoProc [2018-06-25 13:44:52,646 INFO ]: Found implementation of procedure gotoProc [2018-06-25 13:44:52,646 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 13:44:52,646 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 13:44:52,646 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 13:44:52,841 INFO ]: Using library mode [2018-06-25 13:44:52,841 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:44:52 BoogieIcfgContainer [2018-06-25 13:44:52,842 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 13:44:52,843 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 13:44:52,843 INFO ]: Initializing TraceAbstraction... [2018-06-25 13:44:52,846 INFO ]: TraceAbstraction initialized [2018-06-25 13:44:52,846 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:44:52" (1/3) ... [2018-06-25 13:44:52,847 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bed8683 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 01:44:52, skipping insertion in model container [2018-06-25 13:44:52,847 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:44:52" (2/3) ... [2018-06-25 13:44:52,847 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bed8683 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 01:44:52, skipping insertion in model container [2018-06-25 13:44:52,847 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:44:52" (3/3) ... [2018-06-25 13:44:52,850 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 13:44:52,858 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 13:44:52,866 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 13:44:52,898 INFO ]: Using default assertion order modulation [2018-06-25 13:44:52,899 INFO ]: Interprodecural is true [2018-06-25 13:44:52,899 INFO ]: Hoare is false [2018-06-25 13:44:52,899 INFO ]: Compute interpolants for FPandBP [2018-06-25 13:44:52,899 INFO ]: Backedges is TWOTRACK [2018-06-25 13:44:52,899 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 13:44:52,899 INFO ]: Difference is false [2018-06-25 13:44:52,899 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 13:44:52,899 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 13:44:52,912 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 13:44:52,923 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 13:44:52,923 INFO ]: Found error trace [2018-06-25 13:44:52,924 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:44:52,924 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:44:52,928 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-25 13:44:52,929 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:44:52,930 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:44:52,968 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:44:52,969 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:44:52,969 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:44:53,002 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:44:53,078 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:44:53,080 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 13:44:53,080 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 13:44:53,082 INFO ]: Interpolant automaton has 3 states [2018-06-25 13:44:53,092 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 13:44:53,092 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 13:44:53,094 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 13:44:53,161 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:44:53,161 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 13:44:53,162 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 13:44:53,163 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 13:44:53,163 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:44:53,175 INFO ]: With dead ends: 9 [2018-06-25 13:44:53,175 INFO ]: Without dead ends: 9 [2018-06-25 13:44:53,177 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 13:44:53,195 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 13:44:53,221 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 13:44:53,222 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 13:44:53,222 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 13:44:53,223 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 13:44:53,224 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:44:53,224 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 13:44:53,224 INFO ]: Interpolant automaton has 3 states. [2018-06-25 13:44:53,224 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 13:44:53,224 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 13:44:53,224 INFO ]: Found error trace [2018-06-25 13:44:53,224 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:44:53,224 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:44:53,224 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-25 13:44:53,224 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:44:53,224 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:44:53,225 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:44:53,225 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:44:53,225 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:44:53,267 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:44:53,359 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:44:53,359 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:44:53,359 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 13:44:53,370 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:44:53,414 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:44:53,424 INFO ]: Computing forward predicates... [2018-06-25 13:44:53,616 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:44:53,636 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:44:53,636 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 13:44:53,637 INFO ]: Interpolant automaton has 5 states [2018-06-25 13:44:53,637 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 13:44:53,637 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-25 13:44:53,637 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-25 13:44:53,730 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:44:53,730 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-25 13:44:53,731 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-25 13:44:53,731 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-25 13:44:53,731 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:44:53,731 INFO ]: With dead ends: 11 [2018-06-25 13:44:53,731 INFO ]: Without dead ends: 11 [2018-06-25 13:44:53,732 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-25 13:44:53,732 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-25 13:44:53,733 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-25 13:44:53,733 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-25 13:44:53,733 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-25 13:44:53,734 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-25 13:44:53,734 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:44:53,734 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-25 13:44:53,734 INFO ]: Interpolant automaton has 5 states. [2018-06-25 13:44:53,734 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-25 13:44:53,734 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-25 13:44:53,734 INFO ]: Found error trace [2018-06-25 13:44:53,734 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:44:53,734 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:44:53,734 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 2 times [2018-06-25 13:44:53,734 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:44:53,734 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:44:53,736 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:44:53,736 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:44:53,736 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:44:53,798 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:44:54,008 WARN ]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-25 13:44:54,126 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:44:54,126 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:44:54,126 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 13:44:54,132 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 13:44:54,179 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 13:44:54,179 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:44:54,182 INFO ]: Computing forward predicates... [2018-06-25 13:44:54,724 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:44:54,744 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:44:54,744 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-25 13:44:54,744 INFO ]: Interpolant automaton has 7 states [2018-06-25 13:44:54,744 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-25 13:44:54,744 INFO ]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-06-25 13:44:54,744 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-06-25 13:44:55,082 WARN ]: Spent 213.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 9 [2018-06-25 13:44:55,474 WARN ]: Spent 275.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 7 [2018-06-25 13:44:55,475 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:44:55,475 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-25 13:44:55,475 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-25 13:44:55,475 INFO ]: Start accepts. Automaton has 7 states. Word has length 10 [2018-06-25 13:44:55,475 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:44:55,475 INFO ]: With dead ends: 12 [2018-06-25 13:44:55,475 INFO ]: Without dead ends: 12 [2018-06-25 13:44:55,476 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-06-25 13:44:55,476 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-25 13:44:55,477 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-25 13:44:55,477 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-25 13:44:55,477 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-25 13:44:55,477 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-25 13:44:55,477 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:44:55,477 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-25 13:44:55,477 INFO ]: Interpolant automaton has 7 states. [2018-06-25 13:44:55,477 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-25 13:44:55,478 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-25 13:44:55,478 INFO ]: Found error trace [2018-06-25 13:44:55,478 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:44:55,482 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:44:55,482 INFO ]: Analyzing trace with hash 201204236, now seen corresponding path program 3 times [2018-06-25 13:44:55,482 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:44:55,482 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:44:55,483 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:44:55,483 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:44:55,483 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:44:55,539 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:44:55,711 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:44:55,711 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:44:55,711 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 13:44:55,718 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 13:44:55,778 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 13:44:55,778 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:44:55,781 INFO ]: Computing forward predicates... [2018-06-25 13:44:56,599 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:44:56,619 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:44:56,619 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-06-25 13:44:56,619 INFO ]: Interpolant automaton has 8 states [2018-06-25 13:44:56,619 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-25 13:44:56,619 INFO ]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-06-25 13:44:56,620 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 8 states. [2018-06-25 13:44:56,832 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:44:56,832 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-25 13:44:56,832 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-25 13:44:56,832 INFO ]: Start accepts. Automaton has 8 states. Word has length 11 [2018-06-25 13:44:56,832 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:44:56,832 INFO ]: With dead ends: 13 [2018-06-25 13:44:56,832 INFO ]: Without dead ends: 13 [2018-06-25 13:44:56,833 INFO ]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-06-25 13:44:56,833 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-25 13:44:56,834 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-25 13:44:56,834 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-25 13:44:56,835 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-25 13:44:56,835 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-25 13:44:56,835 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:44:56,835 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-25 13:44:56,835 INFO ]: Interpolant automaton has 8 states. [2018-06-25 13:44:56,835 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-25 13:44:56,835 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-25 13:44:56,835 INFO ]: Found error trace [2018-06-25 13:44:56,835 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:44:56,835 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:44:56,836 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 4 times [2018-06-25 13:44:56,836 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:44:56,836 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:44:56,836 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:44:56,836 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:44:56,836 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:44:56,867 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:44:57,122 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:44:57,122 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:44:57,122 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 13:44:57,128 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-25 13:44:57,157 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-25 13:44:57,157 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:44:57,160 INFO ]: Computing forward predicates... [2018-06-25 13:45:04,598 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:45:04,623 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:45:04,623 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2018-06-25 13:45:04,623 INFO ]: Interpolant automaton has 10 states [2018-06-25 13:45:04,623 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-25 13:45:04,623 INFO ]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-06-25 13:45:04,623 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 10 states. [2018-06-25 13:45:04,907 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:45:04,907 INFO ]: Finished difference Result 14 states and 14 transitions. [2018-06-25 13:45:04,907 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-25 13:45:04,907 INFO ]: Start accepts. Automaton has 10 states. Word has length 12 [2018-06-25 13:45:04,907 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:45:04,907 INFO ]: With dead ends: 14 [2018-06-25 13:45:04,907 INFO ]: Without dead ends: 14 [2018-06-25 13:45:04,908 INFO ]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2018-06-25 13:45:04,908 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-25 13:45:04,909 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-06-25 13:45:04,909 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-25 13:45:04,909 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-06-25 13:45:04,910 INFO ]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-06-25 13:45:04,910 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:45:04,910 INFO ]: Abstraction has 14 states and 14 transitions. [2018-06-25 13:45:04,910 INFO ]: Interpolant automaton has 10 states. [2018-06-25 13:45:04,910 INFO ]: Start isEmpty. Operand 14 states and 14 transitions. [2018-06-25 13:45:04,910 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-25 13:45:04,910 INFO ]: Found error trace [2018-06-25 13:45:04,910 INFO ]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:45:04,910 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:45:04,910 INFO ]: Analyzing trace with hash 23503628, now seen corresponding path program 5 times [2018-06-25 13:45:04,910 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:45:04,910 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:45:04,911 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:45:04,911 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:45:04,911 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:45:04,971 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:45:05,230 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:45:05,230 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:45:05,230 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 13:45:05,239 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-25 13:45:05,315 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-25 13:45:05,315 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:45:05,319 INFO ]: Computing forward predicates... [2018-06-25 13:45:05,598 WARN ]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 4 [2018-06-25 13:45:05,807 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:45:09,888 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:45:09,907 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:45:09,908 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2018-06-25 13:45:09,908 INFO ]: Interpolant automaton has 15 states [2018-06-25 13:45:09,908 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-25 13:45:09,908 INFO ]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2018-06-25 13:45:09,908 INFO ]: Start difference. First operand 14 states and 14 transitions. Second operand 15 states. [2018-06-25 13:45:10,188 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:45:10,188 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-25 13:45:10,188 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-25 13:45:10,188 INFO ]: Start accepts. Automaton has 15 states. Word has length 13 [2018-06-25 13:45:10,188 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:45:10,188 INFO ]: With dead ends: 15 [2018-06-25 13:45:10,188 INFO ]: Without dead ends: 15 [2018-06-25 13:45:10,188 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2018-06-25 13:45:10,188 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-25 13:45:10,189 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-25 13:45:10,189 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-25 13:45:10,190 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-06-25 13:45:10,190 INFO ]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-06-25 13:45:10,190 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:45:10,190 INFO ]: Abstraction has 15 states and 15 transitions. [2018-06-25 13:45:10,190 INFO ]: Interpolant automaton has 15 states. [2018-06-25 13:45:10,190 INFO ]: Start isEmpty. Operand 15 states and 15 transitions. [2018-06-25 13:45:10,190 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-25 13:45:10,190 INFO ]: Found error trace [2018-06-25 13:45:10,190 INFO ]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:45:10,190 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:45:10,190 INFO ]: Analyzing trace with hash 726730004, now seen corresponding path program 6 times [2018-06-25 13:45:10,190 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:45:10,190 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:45:10,191 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:45:10,191 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:45:10,191 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:45:10,239 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:45:11,365 WARN ]: Spent 867.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 11 [2018-06-25 13:45:11,787 WARN ]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-25 13:45:11,889 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:45:11,890 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:45:11,890 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-25 13:45:11,904 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:45:11,948 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-06-25 13:45:11,948 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:45:11,951 INFO ]: Computing forward predicates... [2018-06-25 13:45:17,139 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:45:17,159 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:45:17,159 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-25 13:45:17,160 INFO ]: Interpolant automaton has 17 states [2018-06-25 13:45:17,160 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-25 13:45:17,160 INFO ]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2018-06-25 13:45:17,160 INFO ]: Start difference. First operand 15 states and 15 transitions. Second operand 17 states. [2018-06-25 13:45:17,343 WARN ]: Spent 116.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2018-06-25 13:45:17,622 WARN ]: Spent 127.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2018-06-25 13:45:17,712 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:45:17,712 INFO ]: Finished difference Result 16 states and 16 transitions. [2018-06-25 13:45:17,712 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-25 13:45:17,712 INFO ]: Start accepts. Automaton has 17 states. Word has length 14 [2018-06-25 13:45:17,712 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:45:17,712 INFO ]: With dead ends: 16 [2018-06-25 13:45:17,713 INFO ]: Without dead ends: 16 [2018-06-25 13:45:17,713 INFO ]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2018-06-25 13:45:17,713 INFO ]: Start minimizeSevpa. Operand 16 states. [2018-06-25 13:45:17,714 INFO ]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-06-25 13:45:17,714 INFO ]: Start removeUnreachable. Operand 16 states. [2018-06-25 13:45:17,715 INFO ]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-06-25 13:45:17,715 INFO ]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-06-25 13:45:17,715 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:45:17,715 INFO ]: Abstraction has 16 states and 16 transitions. [2018-06-25 13:45:17,715 INFO ]: Interpolant automaton has 17 states. [2018-06-25 13:45:17,715 INFO ]: Start isEmpty. Operand 16 states and 16 transitions. [2018-06-25 13:45:17,716 INFO ]: Finished isEmpty. Found accepting run of length 16 [2018-06-25 13:45:17,716 INFO ]: Found error trace [2018-06-25 13:45:17,716 INFO ]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:45:17,716 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:45:17,716 INFO ]: Analyzing trace with hash 1051911180, now seen corresponding path program 7 times [2018-06-25 13:45:17,716 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:45:17,716 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:45:17,716 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:45:17,716 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:45:17,716 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:45:17,798 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:45:18,185 INFO ]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:45:18,185 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:45:18,185 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 13:45:18,194 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:45:18,239 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:45:18,243 INFO ]: Computing forward predicates... [2018-06-25 13:45:19,698 INFO ]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:45:19,718 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:45:19,718 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2018-06-25 13:45:19,718 INFO ]: Interpolant automaton has 18 states [2018-06-25 13:45:19,719 INFO ]: Constructing interpolant automaton starting with 18 interpolants. [2018-06-25 13:45:19,719 INFO ]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2018-06-25 13:45:19,719 INFO ]: Start difference. First operand 16 states and 16 transitions. Second operand 18 states. [2018-06-25 13:45:20,276 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:45:20,276 INFO ]: Finished difference Result 17 states and 17 transitions. [2018-06-25 13:45:20,277 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-25 13:45:20,277 INFO ]: Start accepts. Automaton has 18 states. Word has length 15 [2018-06-25 13:45:20,277 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:45:20,277 INFO ]: With dead ends: 17 [2018-06-25 13:45:20,277 INFO ]: Without dead ends: 17 [2018-06-25 13:45:20,278 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2018-06-25 13:45:20,278 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-25 13:45:20,280 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-25 13:45:20,280 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-25 13:45:20,280 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-06-25 13:45:20,280 INFO ]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-06-25 13:45:20,281 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:45:20,281 INFO ]: Abstraction has 17 states and 17 transitions. [2018-06-25 13:45:20,281 INFO ]: Interpolant automaton has 18 states. [2018-06-25 13:45:20,281 INFO ]: Start isEmpty. Operand 17 states and 17 transitions. [2018-06-25 13:45:20,281 INFO ]: Finished isEmpty. Found accepting run of length 17 [2018-06-25 13:45:20,281 INFO ]: Found error trace [2018-06-25 13:45:20,281 INFO ]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:45:20,281 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:45:20,281 INFO ]: Analyzing trace with hash -1752374252, now seen corresponding path program 8 times [2018-06-25 13:45:20,281 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:45:20,281 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:45:20,282 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:45:20,282 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:45:20,282 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:45:20,355 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:45:20,678 WARN ]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2018-06-25 13:45:20,855 INFO ]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-25 13:45:20,855 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:45:20,855 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 13:45:20,861 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 13:45:20,904 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 13:45:20,904 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:45:20,908 INFO ]: Computing forward predicates... [2018-06-25 13:45:21,415 WARN ]: Spent 278.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 17 [2018-06-25 13:45:23,366 INFO ]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:45:23,386 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:45:23,387 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2018-06-25 13:45:23,387 INFO ]: Interpolant automaton has 19 states [2018-06-25 13:45:23,387 INFO ]: Constructing interpolant automaton starting with 19 interpolants. [2018-06-25 13:45:23,387 INFO ]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2018-06-25 13:45:23,387 INFO ]: Start difference. First operand 17 states and 17 transitions. Second operand 19 states. [2018-06-25 13:45:23,479 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:45:23,479 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-25 13:45:23,480 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-25 13:45:23,480 INFO ]: Start accepts. Automaton has 19 states. Word has length 16 [2018-06-25 13:45:23,480 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:45:23,480 INFO ]: With dead ends: 13 [2018-06-25 13:45:23,480 INFO ]: Without dead ends: 0 [2018-06-25 13:45:23,480 INFO ]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2018-06-25 13:45:23,480 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-25 13:45:23,480 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-25 13:45:23,480 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-25 13:45:23,480 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-25 13:45:23,480 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2018-06-25 13:45:23,480 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:45:23,480 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-25 13:45:23,480 INFO ]: Interpolant automaton has 19 states. [2018-06-25 13:45:23,480 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-25 13:45:23,480 INFO ]: Finished isEmpty. No accepting run. [2018-06-25 13:45:23,484 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 01:45:23 BoogieIcfgContainer [2018-06-25 13:45:23,484 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 13:45:23,485 INFO ]: Toolchain (without parser) took 30944.77 ms. Allocated memory was 307.2 MB in the beginning and 1.4 GB in the end (delta: 1.1 GB). Free memory was 261.6 MB in the beginning and 1.4 GB in the end (delta: -1.1 GB). Peak memory consumption was 42.2 MB. Max. memory is 3.6 GB. [2018-06-25 13:45:23,486 INFO ]: SmtParser took 0.06 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 13:45:23,486 INFO ]: ChcToBoogie took 54.94 ms. Allocated memory is still 307.2 MB. Free memory was 261.6 MB in the beginning and 259.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 3.6 GB. [2018-06-25 13:45:23,487 INFO ]: Boogie Preprocessor took 34.57 ms. Allocated memory is still 307.2 MB. Free memory was 259.5 MB in the beginning and 258.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:45:23,487 INFO ]: RCFGBuilder took 206.10 ms. Allocated memory is still 307.2 MB. Free memory was 257.5 MB in the beginning and 249.5 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:45:23,488 INFO ]: TraceAbstraction took 30641.49 ms. Allocated memory was 307.2 MB in the beginning and 1.4 GB in the end (delta: 1.1 GB). Free memory was 248.5 MB in the beginning and 1.4 GB in the end (delta: -1.1 GB). Peak memory consumption was 29.1 MB. Max. memory is 3.6 GB. [2018-06-25 13:45:23,492 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.06 ms. Allocated memory is still 307.2 MB. Free memory is still 272.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 54.94 ms. Allocated memory is still 307.2 MB. Free memory was 261.6 MB in the beginning and 259.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 34.57 ms. Allocated memory is still 307.2 MB. Free memory was 259.5 MB in the beginning and 258.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 206.10 ms. Allocated memory is still 307.2 MB. Free memory was 257.5 MB in the beginning and 249.5 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 30641.49 ms. Allocated memory was 307.2 MB in the beginning and 1.4 GB in the end (delta: 1.1 GB). Free memory was 248.5 MB in the beginning and 1.4 GB in the end (delta: -1.1 GB). Peak memory consumption was 29.1 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. SAFE Result, 30.5s OverallTime, 9 OverallIterations, 9 TraceHistogramMax, 2.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 59 SDtfs, 39 SDslu, 245 SDs, 0 SdLazy, 85 SolverSat, 97 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 203 GetRequests, 59 SyntacticMatches, 18 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 7.8s 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, 9 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 26.4s InterpolantComputationTime, 205 NumberOfCodeBlocks, 205 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 188 ConstructedInterpolants, 0 QuantifiedInterpolants, 14548 SizeOfPredicates, 32 NumberOfNonLiveVariables, 1548 ConjunctsInSsa, 365 ConjunctsInUnsatCore, 17 InterpolantComputations, 1 PerfectInterpolantSequences, 1/324 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/up-nested.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-25_13-45-23-503.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/up-nested.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_13-45-23-503.csv Received shutdown request...