java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/ctigar/gulwani_cegar1.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 15:06:13,196 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 15:06:13,198 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 15:06:13,215 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 15:06:13,215 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 15:06:13,216 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 15:06:13,217 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 15:06:13,221 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 15:06:13,223 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 15:06:13,225 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 15:06:13,226 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 15:06:13,226 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 15:06:13,227 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 15:06:13,229 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 15:06:13,229 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 15:06:13,230 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 15:06:13,232 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 15:06:13,234 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 15:06:13,235 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 15:06:13,236 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 15:06:13,237 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 15:06:13,240 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 15:06:13,240 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 15:06:13,240 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 15:06:13,241 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 15:06:13,242 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 15:06:13,243 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 15:06:13,244 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 15:06:13,245 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 15:06:13,245 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 15:06:13,246 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 15:06:13,246 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 15:06:13,247 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 15:06:13,247 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 15:06:13,248 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 15:06:13,248 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 15:06:13,265 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 15:06:13,270 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 15:06:13,271 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 15:06:13,271 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 15:06:13,272 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 15:06:13,272 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 15:06:13,272 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 15:06:13,273 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 15:06:13,273 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 15:06:13,273 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 15:06:13,273 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:06:13,273 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 15:06:13,274 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 15:06:13,274 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 15:06:13,274 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 15:06:13,274 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 15:06:13,274 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 15:06:13,274 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 15:06:13,275 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 15:06:13,276 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 15:06:13,276 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 15:06:13,321 INFO ]: Repository-Root is: /tmp [2018-06-22 15:06:13,332 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 15:06:13,338 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 15:06:13,339 INFO ]: Initializing SmtParser... [2018-06-22 15:06:13,339 INFO ]: SmtParser initialized [2018-06-22 15:06:13,340 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/gulwani_cegar1.c.smt2 [2018-06-22 15:06:13,341 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-22 15:06:13,436 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/gulwani_cegar1.c.smt2 unknown [2018-06-22 15:06:13,727 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/gulwani_cegar1.c.smt2 [2018-06-22 15:06:13,732 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 15:06:13,739 INFO ]: Walking toolchain with 4 elements. [2018-06-22 15:06:13,740 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 15:06:13,740 INFO ]: Initializing ChcToBoogie... [2018-06-22 15:06:13,740 INFO ]: ChcToBoogie initialized [2018-06-22 15:06:13,743 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:06:13" (1/1) ... [2018-06-22 15:06:13,793 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:06:13 Unit [2018-06-22 15:06:13,794 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 15:06:13,795 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 15:06:13,795 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 15:06:13,795 INFO ]: Boogie Preprocessor initialized [2018-06-22 15:06:13,820 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:06:13" (1/1) ... [2018-06-22 15:06:13,821 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:06:13" (1/1) ... [2018-06-22 15:06:13,829 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:06:13" (1/1) ... [2018-06-22 15:06:13,829 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:06:13" (1/1) ... [2018-06-22 15:06:13,833 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:06:13" (1/1) ... [2018-06-22 15:06:13,834 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:06:13" (1/1) ... [2018-06-22 15:06:13,836 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:06:13" (1/1) ... [2018-06-22 15:06:13,837 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 15:06:13,838 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 15:06:13,838 INFO ]: Initializing RCFGBuilder... [2018-06-22 15:06:13,838 INFO ]: RCFGBuilder initialized [2018-06-22 15:06:13,839 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:06:13" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-22 15:06:13,854 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 15:06:13,854 INFO ]: Found specification of procedure False [2018-06-22 15:06:13,854 INFO ]: Found implementation of procedure False [2018-06-22 15:06:13,854 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 15:06:13,854 INFO ]: Found specification of procedure state [2018-06-22 15:06:13,854 INFO ]: Found implementation of procedure state [2018-06-22 15:06:13,854 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 15:06:13,854 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 15:06:13,854 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:06:14,084 INFO ]: Using library mode [2018-06-22 15:06:14,084 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:06:14 BoogieIcfgContainer [2018-06-22 15:06:14,084 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 15:06:14,086 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 15:06:14,086 INFO ]: Initializing TraceAbstraction... [2018-06-22 15:06:14,089 INFO ]: TraceAbstraction initialized [2018-06-22 15:06:14,089 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:06:13" (1/3) ... [2018-06-22 15:06:14,090 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e75e21b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 03:06:14, skipping insertion in model container [2018-06-22 15:06:14,090 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:06:13" (2/3) ... [2018-06-22 15:06:14,090 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e75e21b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 03:06:14, skipping insertion in model container [2018-06-22 15:06:14,090 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:06:14" (3/3) ... [2018-06-22 15:06:14,092 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 15:06:14,101 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 15:06:14,109 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 15:06:14,147 INFO ]: Using default assertion order modulation [2018-06-22 15:06:14,147 INFO ]: Interprodecural is true [2018-06-22 15:06:14,147 INFO ]: Hoare is false [2018-06-22 15:06:14,147 INFO ]: Compute interpolants for FPandBP [2018-06-22 15:06:14,147 INFO ]: Backedges is TWOTRACK [2018-06-22 15:06:14,148 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 15:06:14,148 INFO ]: Difference is false [2018-06-22 15:06:14,148 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 15:06:14,148 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 15:06:14,160 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 15:06:14,169 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 15:06:14,169 INFO ]: Found error trace [2018-06-22 15:06:14,170 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:06:14,170 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:06:14,173 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 15:06:14,175 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:06:14,175 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:06:14,211 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:06:14,211 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:06:14,211 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:06:14,249 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:06:14,428 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 15:06:14,434 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 15:06:14,434 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 15:06:14,436 INFO ]: Interpolant automaton has 4 states [2018-06-22 15:06:14,451 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 15:06:14,452 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:06:14,453 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 15:06:14,558 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:06:14,558 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 15:06:14,560 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 15:06:14,561 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 15:06:14,561 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:06:14,570 INFO ]: With dead ends: 13 [2018-06-22 15:06:14,570 INFO ]: Without dead ends: 13 [2018-06-22 15:06:14,572 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:06:14,586 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 15:06:14,604 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 15:06:14,605 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 15:06:14,606 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 15:06:14,607 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 15:06:14,607 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:06:14,607 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 15:06:14,607 INFO ]: Interpolant automaton has 4 states. [2018-06-22 15:06:14,607 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 15:06:14,608 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 15:06:14,608 INFO ]: Found error trace [2018-06-22 15:06:14,608 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:06:14,608 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:06:14,608 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 15:06:14,608 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:06:14,608 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:06:14,609 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:06:14,609 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:06:14,609 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:06:14,648 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:06:14,848 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:06:14,848 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:06:14,848 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:06:14,855 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:06:14,898 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:06:14,908 INFO ]: Computing forward predicates... [2018-06-22 15:06:15,402 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:06:15,422 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:06:15,422 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 15:06:15,423 INFO ]: Interpolant automaton has 9 states [2018-06-22 15:06:15,423 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 15:06:15,423 INFO ]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-06-22 15:06:15,424 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 15:06:15,800 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:06:15,800 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 15:06:15,802 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 15:06:15,802 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 15:06:15,802 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:06:15,802 INFO ]: With dead ends: 15 [2018-06-22 15:06:15,803 INFO ]: Without dead ends: 15 [2018-06-22 15:06:15,804 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2018-06-22 15:06:15,804 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 15:06:15,806 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 15:06:15,806 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 15:06:15,808 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 15:06:15,808 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 15:06:15,808 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:06:15,808 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 15:06:15,808 INFO ]: Interpolant automaton has 9 states. [2018-06-22 15:06:15,808 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 15:06:15,809 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 15:06:15,809 INFO ]: Found error trace [2018-06-22 15:06:15,809 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:06:15,809 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:06:15,809 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 15:06:15,809 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:06:15,809 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:06:15,810 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:06:15,810 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:06:15,810 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:06:15,869 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:06:16,357 WARN ]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 15:06:16,531 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:06:16,532 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:06:16,532 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:06:16,539 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:06:16,579 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:06:16,579 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:06:16,582 INFO ]: Computing forward predicates... [2018-06-22 15:06:17,078 WARN ]: Spent 421.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2018-06-22 15:06:17,167 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:06:17,191 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:06:17,192 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-06-22 15:06:17,192 INFO ]: Interpolant automaton has 11 states [2018-06-22 15:06:17,192 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-22 15:06:17,192 INFO ]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2018-06-22 15:06:17,192 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-06-22 15:06:17,344 WARN ]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-06-22 15:06:17,612 WARN ]: Spent 141.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 14 [2018-06-22 15:06:17,702 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:06:17,702 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 15:06:17,703 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 15:06:17,703 INFO ]: Start accepts. Automaton has 11 states. Word has length 17 [2018-06-22 15:06:17,703 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:06:17,703 INFO ]: With dead ends: 17 [2018-06-22 15:06:17,703 INFO ]: Without dead ends: 17 [2018-06-22 15:06:17,704 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2018-06-22 15:06:17,704 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 15:06:17,707 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 15:06:17,707 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 15:06:17,707 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 15:06:17,707 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 15:06:17,708 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:06:17,708 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 15:06:17,708 INFO ]: Interpolant automaton has 11 states. [2018-06-22 15:06:17,708 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 15:06:17,708 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 15:06:17,708 INFO ]: Found error trace [2018-06-22 15:06:17,708 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:06:17,708 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:06:17,709 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 15:06:17,709 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:06:17,709 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:06:17,709 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:06:17,709 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:06:17,709 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:06:17,741 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:06:18,108 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:06:18,108 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:06:18,109 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:06:18,124 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 15:06:18,159 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 15:06:18,159 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:06:18,162 INFO ]: Computing forward predicates... [2018-06-22 15:06:18,480 WARN ]: Spent 236.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 16 [2018-06-22 15:06:18,692 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:06:18,713 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:06:18,713 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2018-06-22 15:06:18,713 INFO ]: Interpolant automaton has 13 states [2018-06-22 15:06:18,713 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 15:06:18,713 INFO ]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2018-06-22 15:06:18,714 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 13 states. [2018-06-22 15:06:18,851 WARN ]: Spent 123.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2018-06-22 15:06:19,100 WARN ]: Spent 139.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2018-06-22 15:06:19,231 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:06:19,231 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 15:06:19,232 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 15:06:19,232 INFO ]: Start accepts. Automaton has 13 states. Word has length 21 [2018-06-22 15:06:19,232 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:06:19,232 INFO ]: With dead ends: 19 [2018-06-22 15:06:19,232 INFO ]: Without dead ends: 19 [2018-06-22 15:06:19,233 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2018-06-22 15:06:19,233 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 15:06:19,236 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 15:06:19,236 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 15:06:19,236 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 15:06:19,236 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 15:06:19,236 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:06:19,236 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 15:06:19,236 INFO ]: Interpolant automaton has 13 states. [2018-06-22 15:06:19,236 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 15:06:19,237 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 15:06:19,237 INFO ]: Found error trace [2018-06-22 15:06:19,237 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:06:19,237 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:06:19,237 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-22 15:06:19,237 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:06:19,238 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:06:19,238 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:06:19,238 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:06:19,238 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:06:19,270 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:06:19,735 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:06:19,735 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:06:19,735 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:06:19,742 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 15:06:19,794 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 15:06:19,794 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:06:19,798 INFO ]: Computing forward predicates... [2018-06-22 15:06:20,138 WARN ]: Spent 138.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 22 [2018-06-22 15:06:20,367 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:06:20,395 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:06:20,418 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2018-06-22 15:06:20,418 INFO ]: Interpolant automaton has 18 states [2018-06-22 15:06:20,418 INFO ]: Constructing interpolant automaton starting with 18 interpolants. [2018-06-22 15:06:20,418 INFO ]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2018-06-22 15:06:20,419 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 18 states. [2018-06-22 15:06:20,637 WARN ]: Spent 184.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2018-06-22 15:06:20,900 WARN ]: Spent 118.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2018-06-22 15:06:21,103 WARN ]: Spent 186.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2018-06-22 15:06:21,238 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:06:21,238 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 15:06:21,238 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 15:06:21,238 INFO ]: Start accepts. Automaton has 18 states. Word has length 25 [2018-06-22 15:06:21,238 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:06:21,239 INFO ]: With dead ends: 21 [2018-06-22 15:06:21,239 INFO ]: Without dead ends: 21 [2018-06-22 15:06:21,239 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2018-06-22 15:06:21,239 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 15:06:21,243 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 15:06:21,243 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 15:06:21,243 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 15:06:21,243 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 15:06:21,244 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:06:21,244 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 15:06:21,244 INFO ]: Interpolant automaton has 18 states. [2018-06-22 15:06:21,244 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 15:06:21,244 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 15:06:21,244 INFO ]: Found error trace [2018-06-22 15:06:21,244 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:06:21,244 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:06:21,245 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 5 times [2018-06-22 15:06:21,245 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:06:21,245 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:06:21,245 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:06:21,245 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:06:21,245 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:06:21,284 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:06:21,657 WARN ]: Spent 117.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2018-06-22 15:06:21,769 WARN ]: Spent 102.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2018-06-22 15:06:22,000 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:06:22,000 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:06:22,000 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:06:22,006 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 15:06:22,044 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 15:06:22,045 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:06:22,048 INFO ]: Computing forward predicates... [2018-06-22 15:06:30,669 WARN ]: Spent 7.87 s on a formula simplification. DAG size of input: 727 DAG size of output: 81 [2018-06-22 15:06:30,942 WARN ]: Spent 136.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2018-06-22 15:06:31,120 WARN ]: Spent 118.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 22 [2018-06-22 15:06:32,503 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:06:32,530 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:06:32,530 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2018-06-22 15:06:32,530 INFO ]: Interpolant automaton has 22 states [2018-06-22 15:06:32,530 INFO ]: Constructing interpolant automaton starting with 22 interpolants. [2018-06-22 15:06:32,530 INFO ]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2018-06-22 15:06:32,531 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 22 states. [2018-06-22 15:06:33,335 WARN ]: Spent 687.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 84 [2018-06-22 15:06:33,751 WARN ]: Spent 361.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 22 [2018-06-22 15:06:34,606 WARN ]: Spent 825.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 56 [2018-06-22 15:06:35,263 WARN ]: Spent 623.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 35 [2018-06-22 15:06:35,727 WARN ]: Spent 431.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 35 [2018-06-22 15:06:36,626 WARN ]: Spent 868.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 59 [2018-06-22 15:06:36,778 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:06:36,778 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 15:06:36,784 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 15:06:36,784 INFO ]: Start accepts. Automaton has 22 states. Word has length 29 [2018-06-22 15:06:36,784 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:06:36,786 INFO ]: With dead ends: 23 [2018-06-22 15:06:36,786 INFO ]: Without dead ends: 23 [2018-06-22 15:06:36,786 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2018-06-22 15:06:36,786 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 15:06:36,789 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 15:06:36,789 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 15:06:36,790 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 15:06:36,790 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 15:06:36,790 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:06:36,790 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 15:06:36,790 INFO ]: Interpolant automaton has 22 states. [2018-06-22 15:06:36,790 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 15:06:36,791 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 15:06:36,791 INFO ]: Found error trace [2018-06-22 15:06:36,791 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:06:36,791 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:06:36,791 INFO ]: Analyzing trace with hash 800064122, now seen corresponding path program 6 times [2018-06-22 15:06:36,791 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:06:36,791 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:06:36,792 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:06:36,792 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:06:36,792 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:06:36,856 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:06:37,614 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:06:37,614 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:06:37,614 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:06:37,620 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 15:06:37,675 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-22 15:06:37,675 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:06:37,680 INFO ]: Computing forward predicates... [2018-06-22 15:06:54,056 WARN ]: Spent 15.33 s on a formula simplification. DAG size of input: 1528 DAG size of output: 82 [2018-06-22 15:06:54,282 WARN ]: Spent 139.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 23 [2018-06-22 15:06:54,727 WARN ]: Spent 387.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 40 [2018-06-22 15:06:55,322 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:06:55,352 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:06:55,352 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2018-06-22 15:06:55,353 INFO ]: Interpolant automaton has 23 states [2018-06-22 15:06:55,353 INFO ]: Constructing interpolant automaton starting with 23 interpolants. [2018-06-22 15:06:55,353 INFO ]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2018-06-22 15:06:55,353 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 23 states. [2018-06-22 15:06:56,467 WARN ]: Spent 1.07 s on a formula simplification. DAG size of input: 129 DAG size of output: 68 [2018-06-22 15:06:56,989 WARN ]: Spent 464.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 32 [2018-06-22 15:06:57,621 WARN ]: Spent 596.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 37 [2018-06-22 15:06:58,137 WARN ]: Spent 481.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 36 [2018-06-22 15:06:58,586 WARN ]: Spent 400.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 40 [2018-06-22 15:06:59,065 WARN ]: Spent 445.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 39 [2018-06-22 15:06:59,638 WARN ]: Spent 509.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 45 [2018-06-22 15:06:59,680 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:06:59,680 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 15:06:59,681 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 15:06:59,681 INFO ]: Start accepts. Automaton has 23 states. Word has length 33 [2018-06-22 15:06:59,681 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:06:59,682 INFO ]: With dead ends: 25 [2018-06-22 15:06:59,682 INFO ]: Without dead ends: 25 [2018-06-22 15:06:59,682 INFO ]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2018-06-22 15:06:59,682 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 15:06:59,686 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 15:06:59,686 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 15:06:59,686 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 15:06:59,686 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 33 [2018-06-22 15:06:59,686 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:06:59,686 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 15:06:59,687 INFO ]: Interpolant automaton has 23 states. [2018-06-22 15:06:59,687 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 15:06:59,687 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 15:06:59,687 INFO ]: Found error trace [2018-06-22 15:06:59,687 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:06:59,688 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:06:59,688 INFO ]: Analyzing trace with hash -411423458, now seen corresponding path program 7 times [2018-06-22 15:06:59,688 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:06:59,688 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:06:59,688 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:06:59,689 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:06:59,689 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:06:59,738 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:07:00,005 WARN ]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2018-06-22 15:07:01,677 WARN ]: Spent 1.62 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2018-06-22 15:07:01,888 WARN ]: Spent 135.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2018-06-22 15:07:02,401 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:07:02,401 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:07:02,401 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 [2018-06-22 15:07:02,407 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:07:02,457 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:07:02,462 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-22 15:07:18,326 INFO ]: Timeout while computing interpolants [2018-06-22 15:07:18,526 WARN ]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:07:18,526 WARN ]: Verification canceled [2018-06-22 15:07:18,530 WARN ]: Timeout [2018-06-22 15:07:18,530 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 03:07:18 BoogieIcfgContainer [2018-06-22 15:07:18,530 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 15:07:18,530 INFO ]: Toolchain (without parser) took 64797.91 ms. Allocated memory was 309.3 MB in the beginning and 1.3 GB in the end (delta: 1.0 GB). Free memory was 262.9 MB in the beginning and 351.4 MB in the end (delta: -88.6 MB). Peak memory consumption was 1.1 GB. Max. memory is 3.6 GB. [2018-06-22 15:07:18,531 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 309.3 MB. Free memory is still 275.0 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 15:07:18,531 INFO ]: ChcToBoogie took 55.07 ms. Allocated memory is still 309.3 MB. Free memory was 261.9 MB in the beginning and 260.9 MB in the end (delta: 996.4 kB). Peak memory consumption was 996.4 kB. Max. memory is 3.6 GB. [2018-06-22 15:07:18,532 INFO ]: Boogie Preprocessor took 42.16 ms. Allocated memory is still 309.3 MB. Free memory was 259.9 MB in the beginning and 258.9 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-22 15:07:18,532 INFO ]: RCFGBuilder took 246.42 ms. Allocated memory is still 309.3 MB. Free memory was 258.9 MB in the beginning and 249.9 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:07:18,533 INFO ]: TraceAbstraction took 64443.88 ms. Allocated memory was 309.3 MB in the beginning and 1.3 GB in the end (delta: 1.0 GB). Free memory was 249.9 MB in the beginning and 351.4 MB in the end (delta: -101.6 MB). Peak memory consumption was 1.1 GB. Max. memory is 3.6 GB. [2018-06-22 15:07:18,536 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 309.3 MB. Free memory is still 275.0 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 55.07 ms. Allocated memory is still 309.3 MB. Free memory was 261.9 MB in the beginning and 260.9 MB in the end (delta: 996.4 kB). Peak memory consumption was 996.4 kB. Max. memory is 3.6 GB. * Boogie Preprocessor took 42.16 ms. Allocated memory is still 309.3 MB. Free memory was 259.9 MB in the beginning and 258.9 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 246.42 ms. Allocated memory is still 309.3 MB. Free memory was 258.9 MB in the beginning and 249.9 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 64443.88 ms. Allocated memory was 309.3 MB in the beginning and 1.3 GB in the end (delta: 1.0 GB). Free memory was 249.9 MB in the beginning and 351.4 MB in the end (delta: -101.6 MB). Peak memory consumption was 1.1 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 38 with TraceHistMax 8, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 3 quantified variables from 14 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 64.3s OverallTime, 8 OverallIterations, 8 TraceHistogramMax, 10.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 89 SDtfs, 194 SDslu, 479 SDs, 0 SdLazy, 397 SolverSat, 250 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 234 GetRequests, 104 SyntacticMatches, 12 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 39.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=7, 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, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 33.6s InterpolantComputationTime, 285 NumberOfCodeBlocks, 285 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 272 ConstructedInterpolants, 0 QuantifiedInterpolants, 5345552 SizeOfPredicates, 222 NumberOfNonLiveVariables, 1131 ConjunctsInSsa, 247 ConjunctsInUnsatCore, 13 InterpolantComputations, 1 PerfectInterpolantSequences, 112/406 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/gulwani_cegar1.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_15-07-18-546.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/gulwani_cegar1.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_15-07-18-546.csv Completed graceful shutdown