java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/cav12/s3_srvr_9.cil.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:23:41,329 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:23:41,331 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:23:41,342 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:23:41,343 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:23:41,344 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:23:41,346 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:23:41,348 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:23:41,349 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:23:41,350 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:23:41,350 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:23:41,351 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:23:41,351 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:23:41,352 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:23:41,355 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:23:41,356 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:23:41,368 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:23:41,370 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:23:41,371 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:23:41,372 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:23:41,373 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:23:41,375 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:23:41,375 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:23:41,376 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:23:41,376 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:23:41,381 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:23:41,382 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:23:41,383 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:23:41,384 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:23:41,384 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:23:41,385 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:23:41,385 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:23:41,385 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:23:41,391 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:23:41,392 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:23:41,392 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 14:23:41,410 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:23:41,410 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:23:41,410 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:23:41,411 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:23:41,411 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:23:41,412 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:23:41,415 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:23:41,416 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:23:41,416 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:23:41,416 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:23:41,416 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:23:41,416 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:23:41,416 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:23:41,417 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:23:41,417 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:23:41,417 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:23:41,417 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:23:41,417 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:23:41,417 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:23:41,420 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:23:41,420 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:23:41,465 INFO ]: Repository-Root is: /tmp [2018-06-22 14:23:41,481 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:23:41,486 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:23:41,487 INFO ]: Initializing SmtParser... [2018-06-22 14:23:41,487 INFO ]: SmtParser initialized [2018-06-22 14:23:41,488 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/s3_srvr_9.cil.smt2 [2018-06-22 14:23:41,489 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-22 14:23:41,575 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/s3_srvr_9.cil.smt2 unknown [2018-06-22 14:23:42,157 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/s3_srvr_9.cil.smt2 [2018-06-22 14:23:42,162 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:23:42,177 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:23:42,177 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:23:42,177 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:23:42,177 INFO ]: ChcToBoogie initialized [2018-06-22 14:23:42,186 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:23:42" (1/1) ... [2018-06-22 14:23:42,273 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:23:42 Unit [2018-06-22 14:23:42,273 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:23:42,274 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:23:42,274 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:23:42,274 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:23:42,302 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:23:42" (1/1) ... [2018-06-22 14:23:42,302 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:23:42" (1/1) ... [2018-06-22 14:23:42,312 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:23:42" (1/1) ... [2018-06-22 14:23:42,312 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:23:42" (1/1) ... [2018-06-22 14:23:42,327 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:23:42" (1/1) ... [2018-06-22 14:23:42,328 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:23:42" (1/1) ... [2018-06-22 14:23:42,335 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:23:42" (1/1) ... [2018-06-22 14:23:42,339 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:23:42,340 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:23:42,340 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:23:42,340 INFO ]: RCFGBuilder initialized [2018-06-22 14:23:42,340 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:23:42" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-22 14:23:42,371 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:23:42,371 INFO ]: Found specification of procedure False [2018-06-22 14:23:42,371 INFO ]: Found implementation of procedure False [2018-06-22 14:23:42,371 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:23:42,371 INFO ]: Found specification of procedure state [2018-06-22 14:23:42,372 INFO ]: Found implementation of procedure state [2018-06-22 14:23:42,372 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:23:42,372 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:23:42,372 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:23:42,728 INFO ]: Using library mode [2018-06-22 14:23:42,729 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:23:42 BoogieIcfgContainer [2018-06-22 14:23:42,729 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:23:42,730 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:23:42,730 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:23:42,733 INFO ]: TraceAbstraction initialized [2018-06-22 14:23:42,734 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:23:42" (1/3) ... [2018-06-22 14:23:42,735 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14dd38f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:23:42, skipping insertion in model container [2018-06-22 14:23:42,735 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:23:42" (2/3) ... [2018-06-22 14:23:42,735 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14dd38f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:23:42, skipping insertion in model container [2018-06-22 14:23:42,735 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:23:42" (3/3) ... [2018-06-22 14:23:42,737 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:23:42,747 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:23:42,758 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:23:42,808 INFO ]: Using default assertion order modulation [2018-06-22 14:23:42,809 INFO ]: Interprodecural is true [2018-06-22 14:23:42,809 INFO ]: Hoare is false [2018-06-22 14:23:42,809 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:23:42,809 INFO ]: Backedges is TWOTRACK [2018-06-22 14:23:42,809 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:23:42,809 INFO ]: Difference is false [2018-06-22 14:23:42,809 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:23:42,809 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:23:42,822 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:23:42,831 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:23:42,831 INFO ]: Found error trace [2018-06-22 14:23:42,832 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:23:42,832 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:23:42,840 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 14:23:42,842 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:23:42,842 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:23:42,875 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:23:42,875 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:23:42,875 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:23:42,906 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:23:42,991 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:23:42,993 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:23:42,993 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:23:42,994 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:23:43,008 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:23:43,008 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:23:43,010 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:23:43,145 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:23:43,145 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:23:43,146 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:23:43,148 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:23:43,148 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:23:43,163 INFO ]: With dead ends: 13 [2018-06-22 14:23:43,163 INFO ]: Without dead ends: 13 [2018-06-22 14:23:43,164 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:23:43,179 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:23:43,218 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:23:43,219 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:23:43,220 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:23:43,220 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:23:43,221 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:23:43,221 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:23:43,221 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:23:43,221 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:23:43,222 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:23:43,222 INFO ]: Found error trace [2018-06-22 14:23:43,222 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:23:43,222 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:23:43,222 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 14:23:43,222 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:23:43,222 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:23:43,223 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:23:43,223 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:23:43,223 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:23:43,382 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:23:43,987 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:23:43,987 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:23:43,987 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) [2018-06-22 14:23:44,001 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:23:44,111 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:23:44,124 INFO ]: Computing forward predicates... [2018-06-22 14:23:44,974 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:23:45,010 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:23:45,010 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-22 14:23:45,011 INFO ]: Interpolant automaton has 8 states [2018-06-22 14:23:45,011 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 14:23:45,011 INFO ]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-06-22 14:23:45,011 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-22 14:23:45,267 WARN ]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-22 14:23:45,429 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:23:45,429 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 14:23:45,431 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 14:23:45,431 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-22 14:23:45,431 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:23:45,431 INFO ]: With dead ends: 15 [2018-06-22 14:23:45,431 INFO ]: Without dead ends: 15 [2018-06-22 14:23:45,432 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-06-22 14:23:45,432 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 14:23:45,435 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 14:23:45,435 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 14:23:45,435 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 14:23:45,435 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 14:23:45,435 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:23:45,436 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 14:23:45,436 INFO ]: Interpolant automaton has 8 states. [2018-06-22 14:23:45,436 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 14:23:45,436 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 14:23:45,436 INFO ]: Found error trace [2018-06-22 14:23:45,436 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:23:45,436 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:23:45,436 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 14:23:45,437 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:23:45,437 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:23:45,437 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:23:45,438 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:23:45,438 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:23:45,538 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:23:46,121 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:23:46,122 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:23:46,122 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:23:46,131 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 14:23:46,230 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:23:46,230 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:23:46,238 INFO ]: Computing forward predicates... [2018-06-22 14:23:46,969 WARN ]: Spent 339.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-06-22 14:23:47,483 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:23:47,503 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:23:47,503 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-06-22 14:23:47,503 INFO ]: Interpolant automaton has 12 states [2018-06-22 14:23:47,503 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 14:23:47,503 INFO ]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-06-22 14:23:47,504 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-06-22 14:23:47,795 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:23:47,795 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 14:23:47,799 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:23:47,799 INFO ]: Start accepts. Automaton has 12 states. Word has length 17 [2018-06-22 14:23:47,799 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:23:47,800 INFO ]: With dead ends: 17 [2018-06-22 14:23:47,800 INFO ]: Without dead ends: 17 [2018-06-22 14:23:47,800 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2018-06-22 14:23:47,800 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 14:23:47,803 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 14:23:47,803 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 14:23:47,803 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 14:23:47,803 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 14:23:47,804 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:23:47,804 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 14:23:47,804 INFO ]: Interpolant automaton has 12 states. [2018-06-22 14:23:47,804 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 14:23:47,804 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 14:23:47,804 INFO ]: Found error trace [2018-06-22 14:23:47,804 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:23:47,805 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:23:47,805 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 14:23:47,805 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:23:47,805 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:23:47,805 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:23:47,805 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:23:47,805 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:23:47,940 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:23:48,276 WARN ]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2018-06-22 14:23:48,380 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:23:48,380 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:23:48,380 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:23:48,388 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 14:23:48,527 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 14:23:48,527 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:23:48,539 INFO ]: Computing forward predicates... [2018-06-22 14:23:52,966 WARN ]: Spent 3.46 s on a formula simplification. DAG size of input: 225 DAG size of output: 113 [2018-06-22 14:23:55,153 WARN ]: Spent 1.29 s on a formula simplification. DAG size of input: 109 DAG size of output: 24 [2018-06-22 14:23:55,243 INFO ]: Checked inductivity of 21 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:23:55,267 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:23:55,267 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2018-06-22 14:23:55,268 INFO ]: Interpolant automaton has 16 states [2018-06-22 14:23:55,268 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 14:23:55,268 INFO ]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2018-06-22 14:23:55,268 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 16 states. [2018-06-22 14:23:55,748 WARN ]: Spent 438.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 134 [2018-06-22 14:23:56,113 WARN ]: Spent 333.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 120 [2018-06-22 14:23:56,639 WARN ]: Spent 484.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 122 [2018-06-22 14:23:57,082 WARN ]: Spent 409.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 131 [2018-06-22 14:23:57,113 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:23:57,113 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 14:23:57,114 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 14:23:57,115 INFO ]: Start accepts. Automaton has 16 states. Word has length 21 [2018-06-22 14:23:57,115 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:23:57,116 INFO ]: With dead ends: 19 [2018-06-22 14:23:57,116 INFO ]: Without dead ends: 19 [2018-06-22 14:23:57,116 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2018-06-22 14:23:57,116 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 14:23:57,119 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 14:23:57,119 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 14:23:57,120 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 14:23:57,120 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 14:23:57,120 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:23:57,120 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 14:23:57,120 INFO ]: Interpolant automaton has 16 states. [2018-06-22 14:23:57,120 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 14:23:57,121 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 14:23:57,121 INFO ]: Found error trace [2018-06-22 14:23:57,121 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:23:57,121 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:23:57,121 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-22 14:23:57,121 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:23:57,121 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:23:57,122 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:23:57,122 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:23:57,122 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:23:57,267 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:23:57,851 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 14:23:57,851 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:23:57,851 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:23:57,859 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 14:23:57,993 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 14:23:57,993 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:23:58,007 INFO ]: Computing forward predicates... [2018-06-22 14:23:59,113 WARN ]: Spent 690.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-06-22 14:24:00,719 WARN ]: Spent 1.13 s on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2018-06-22 14:24:01,353 WARN ]: Spent 184.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2018-06-22 14:24:02,009 WARN ]: Spent 212.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2018-06-22 14:24:02,063 INFO ]: Checked inductivity of 36 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 14:24:02,083 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:24:02,084 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2018-06-22 14:24:02,084 INFO ]: Interpolant automaton has 19 states [2018-06-22 14:24:02,084 INFO ]: Constructing interpolant automaton starting with 19 interpolants. [2018-06-22 14:24:02,084 INFO ]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2018-06-22 14:24:02,084 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 19 states. [2018-06-22 14:24:02,519 WARN ]: Spent 369.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2018-06-22 14:24:02,840 WARN ]: Spent 123.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2018-06-22 14:24:03,093 WARN ]: Spent 225.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2018-06-22 14:24:03,144 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:24:03,144 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 14:24:03,145 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 14:24:03,145 INFO ]: Start accepts. Automaton has 19 states. Word has length 25 [2018-06-22 14:24:03,145 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:24:03,146 INFO ]: With dead ends: 21 [2018-06-22 14:24:03,146 INFO ]: Without dead ends: 21 [2018-06-22 14:24:03,146 INFO ]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2018-06-22 14:24:03,146 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 14:24:03,149 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 14:24:03,149 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 14:24:03,150 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 14:24:03,150 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 14:24:03,150 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:24:03,150 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 14:24:03,150 INFO ]: Interpolant automaton has 19 states. [2018-06-22 14:24:03,150 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 14:24:03,151 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 14:24:03,151 INFO ]: Found error trace [2018-06-22 14:24:03,151 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:24:03,151 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:24:03,151 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 5 times [2018-06-22 14:24:03,151 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:24:03,151 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:24:03,152 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:24:03,152 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:24:03,152 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:24:03,368 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:24:04,096 WARN ]: Spent 131.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2018-06-22 14:24:04,451 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 14:24:04,451 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:24:04,451 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:24:04,457 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 14:24:04,698 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 14:24:04,698 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:24:04,722 INFO ]: Computing forward predicates... [2018-06-22 14:24:07,314 WARN ]: Spent 2.05 s on a formula simplification. DAG size of input: 299 DAG size of output: 112 [2018-06-22 14:24:12,896 WARN ]: Spent 5.00 s on a formula simplification. DAG size of input: 358 DAG size of output: 201 [2018-06-22 14:24:14,602 WARN ]: Spent 1.12 s on a formula simplification. DAG size of input: 309 DAG size of output: 78 [2018-06-22 14:24:18,989 WARN ]: Spent 3.79 s on a formula simplification. DAG size of input: 312 DAG size of output: 173 [2018-06-22 14:24:19,603 WARN ]: Spent 206.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 35 [2018-06-22 14:24:20,371 INFO ]: Checked inductivity of 55 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 14:24:20,391 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:24:20,391 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2018-06-22 14:24:20,391 INFO ]: Interpolant automaton has 24 states [2018-06-22 14:24:20,392 INFO ]: Constructing interpolant automaton starting with 24 interpolants. [2018-06-22 14:24:20,392 INFO ]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2018-06-22 14:24:20,392 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 24 states. [2018-06-22 14:24:23,359 WARN ]: Spent 2.86 s on a formula simplification. DAG size of input: 242 DAG size of output: 224 [2018-06-22 14:24:23,836 WARN ]: Spent 365.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 40 [2018-06-22 14:24:24,952 WARN ]: Spent 1.07 s on a formula simplification. DAG size of input: 226 DAG size of output: 145 [2018-06-22 14:24:26,217 WARN ]: Spent 1.20 s on a formula simplification. DAG size of input: 240 DAG size of output: 164 [2018-06-22 14:24:27,689 WARN ]: Spent 1.40 s on a formula simplification. DAG size of input: 243 DAG size of output: 179 [2018-06-22 14:24:29,452 WARN ]: Spent 1.67 s on a formula simplification. DAG size of input: 246 DAG size of output: 209 [2018-06-22 14:24:31,538 WARN ]: Spent 1.89 s on a formula simplification. DAG size of input: 236 DAG size of output: 213 [2018-06-22 14:24:34,375 WARN ]: Spent 2.75 s on a formula simplification. DAG size of input: 241 DAG size of output: 218 [2018-06-22 14:24:34,432 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:24:34,432 INFO ]: Finished difference Result 27 states and 28 transitions. [2018-06-22 14:24:34,433 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 14:24:34,433 INFO ]: Start accepts. Automaton has 24 states. Word has length 29 [2018-06-22 14:24:34,433 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:24:34,434 INFO ]: With dead ends: 27 [2018-06-22 14:24:34,434 INFO ]: Without dead ends: 27 [2018-06-22 14:24:34,434 INFO ]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2018-06-22 14:24:34,435 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-22 14:24:34,438 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-06-22 14:24:34,438 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-22 14:24:34,439 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-06-22 14:24:34,439 INFO ]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 29 [2018-06-22 14:24:34,439 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:24:34,439 INFO ]: Abstraction has 27 states and 28 transitions. [2018-06-22 14:24:34,439 INFO ]: Interpolant automaton has 24 states. [2018-06-22 14:24:34,439 INFO ]: Start isEmpty. Operand 27 states and 28 transitions. [2018-06-22 14:24:34,440 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 14:24:34,440 INFO ]: Found error trace [2018-06-22 14:24:34,440 INFO ]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:24:34,440 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:24:34,440 INFO ]: Analyzing trace with hash 1618126293, now seen corresponding path program 6 times [2018-06-22 14:24:34,440 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:24:34,440 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:24:34,441 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:24:34,441 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:24:34,441 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:24:34,858 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:24:36,403 WARN ]: Spent 748.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 16 [2018-06-22 14:24:36,758 WARN ]: Spent 335.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 67 [2018-06-22 14:24:37,060 WARN ]: Spent 279.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 70 [2018-06-22 14:24:37,256 WARN ]: Spent 176.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 58 [2018-06-22 14:24:37,579 WARN ]: Spent 294.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 68 [2018-06-22 14:24:37,995 WARN ]: Spent 126.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 46 [2018-06-22 14:24:38,246 WARN ]: Spent 116.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 35 [2018-06-22 14:24:38,361 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 14:24:38,361 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:24:38,361 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-22 14:24:38,376 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:24:38,765 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-06-22 14:24:38,765 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:24:38,784 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-22 14:24:40,536 WARN ]: Removed 98 from assertion stack [2018-06-22 14:24:40,536 INFO ]: Timeout while computing interpolants [2018-06-22 14:24:40,737 WARN ]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:24:40,737 WARN ]: Verification canceled [2018-06-22 14:24:40,740 WARN ]: Timeout [2018-06-22 14:24:40,740 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 02:24:40 BoogieIcfgContainer [2018-06-22 14:24:40,740 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 14:24:40,741 INFO ]: Toolchain (without parser) took 58578.44 ms. Allocated memory was 305.1 MB in the beginning and 1.1 GB in the end (delta: 811.1 MB). Free memory was 238.7 MB in the beginning and 513.5 MB in the end (delta: -274.7 MB). Peak memory consumption was 536.3 MB. Max. memory is 3.6 GB. [2018-06-22 14:24:40,741 INFO ]: SmtParser took 0.06 ms. Allocated memory is still 305.1 MB. Free memory is still 270.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 14:24:40,742 INFO ]: ChcToBoogie took 95.88 ms. Allocated memory is still 305.1 MB. Free memory was 238.7 MB in the beginning and 235.8 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-22 14:24:40,742 INFO ]: Boogie Preprocessor took 65.56 ms. Allocated memory is still 305.1 MB. Free memory was 235.8 MB in the beginning and 233.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 14:24:40,742 INFO ]: RCFGBuilder took 389.07 ms. Allocated memory is still 305.1 MB. Free memory was 233.8 MB in the beginning and 205.7 MB in the end (delta: 28.0 MB). Peak memory consumption was 28.0 MB. Max. memory is 3.6 GB. [2018-06-22 14:24:40,743 INFO ]: TraceAbstraction took 58009.94 ms. Allocated memory was 305.1 MB in the beginning and 1.1 GB in the end (delta: 811.1 MB). Free memory was 205.7 MB in the beginning and 513.5 MB in the end (delta: -307.7 MB). Peak memory consumption was 503.3 MB. Max. memory is 3.6 GB. [2018-06-22 14:24:40,745 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 305.1 MB. Free memory is still 270.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 95.88 ms. Allocated memory is still 305.1 MB. Free memory was 238.7 MB in the beginning and 235.8 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 65.56 ms. Allocated memory is still 305.1 MB. Free memory was 235.8 MB in the beginning and 233.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 389.07 ms. Allocated memory is still 305.1 MB. Free memory was 233.8 MB in the beginning and 205.7 MB in the end (delta: 28.0 MB). Peak memory consumption was 28.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 58009.94 ms. Allocated memory was 305.1 MB in the beginning and 1.1 GB in the end (delta: 811.1 MB). Free memory was 205.7 MB in the beginning and 513.5 MB in the end (delta: -307.7 MB). Peak memory consumption was 503.3 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 42 with TraceHistMax 9, while TraceCheckSpWp was constructing forward predicates, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 312. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 57.9s OverallTime, 7 OverallIterations, 9 TraceHistogramMax, 17.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 67 SDtfs, 141 SDslu, 277 SDs, 0 SdLazy, 229 SolverSat, 172 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 177 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 41.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 31.9s InterpolantComputationTime, 219 NumberOfCodeBlocks, 219 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 208 ConstructedInterpolants, 0 QuantifiedInterpolants, 114864 SizeOfPredicates, 2100 NumberOfNonLiveVariables, 1945 ConjunctsInSsa, 85 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 76/250 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/s3_srvr_9.cil.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_14-24-40-753.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/s3_srvr_9.cil.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_14-24-40-753.csv Completed graceful shutdown