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/lifo.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 15:11:41,417 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 15:11:41,421 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 15:11:41,436 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 15:11:41,436 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 15:11:41,437 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 15:11:41,438 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 15:11:41,440 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 15:11:41,441 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 15:11:41,442 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 15:11:41,444 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 15:11:41,444 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 15:11:41,445 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 15:11:41,446 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 15:11:41,446 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 15:11:41,448 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 15:11:41,450 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 15:11:41,452 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 15:11:41,460 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 15:11:41,465 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 15:11:41,466 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 15:11:41,468 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 15:11:41,468 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 15:11:41,468 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 15:11:41,469 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 15:11:41,470 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 15:11:41,470 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 15:11:41,472 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 15:11:41,473 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 15:11:41,474 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 15:11:41,474 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 15:11:41,475 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 15:11:41,475 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 15:11:41,476 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 15:11:41,479 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 15:11:41,479 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 15:11:41,499 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 15:11:41,499 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 15:11:41,500 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 15:11:41,500 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 15:11:41,504 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 15:11:41,504 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 15:11:41,504 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 15:11:41,504 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 15:11:41,505 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 15:11:41,505 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 15:11:41,505 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:11:41,505 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 15:11:41,505 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 15:11:41,505 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 15:11:41,506 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 15:11:41,506 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 15:11:41,506 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 15:11:41,506 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 15:11:41,506 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 15:11:41,508 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 15:11:41,508 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 15:11:41,557 INFO ]: Repository-Root is: /tmp [2018-06-22 15:11:41,572 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 15:11:41,577 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 15:11:41,578 INFO ]: Initializing SmtParser... [2018-06-22 15:11:41,578 INFO ]: SmtParser initialized [2018-06-22 15:11:41,579 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/lifo.c.smt2 [2018-06-22 15:11:41,580 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 15:11:41,659 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/lifo.c.smt2 unknown [2018-06-22 15:11:42,142 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/lifo.c.smt2 [2018-06-22 15:11:42,147 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 15:11:42,155 INFO ]: Walking toolchain with 4 elements. [2018-06-22 15:11:42,156 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 15:11:42,156 INFO ]: Initializing ChcToBoogie... [2018-06-22 15:11:42,156 INFO ]: ChcToBoogie initialized [2018-06-22 15:11:42,159 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:11:42" (1/1) ... [2018-06-22 15:11:42,214 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:11:42 Unit [2018-06-22 15:11:42,214 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 15:11:42,214 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 15:11:42,215 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 15:11:42,215 INFO ]: Boogie Preprocessor initialized [2018-06-22 15:11:42,237 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:11:42" (1/1) ... [2018-06-22 15:11:42,237 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:11:42" (1/1) ... [2018-06-22 15:11:42,258 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:11:42" (1/1) ... [2018-06-22 15:11:42,258 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:11:42" (1/1) ... [2018-06-22 15:11:42,286 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:11:42" (1/1) ... [2018-06-22 15:11:42,287 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:11:42" (1/1) ... [2018-06-22 15:11:42,305 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:11:42" (1/1) ... [2018-06-22 15:11:42,309 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 15:11:42,310 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 15:11:42,310 INFO ]: Initializing RCFGBuilder... [2018-06-22 15:11:42,310 INFO ]: RCFGBuilder initialized [2018-06-22 15:11:42,311 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:11:42" (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 15:11:42,330 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 15:11:42,330 INFO ]: Found specification of procedure False [2018-06-22 15:11:42,330 INFO ]: Found implementation of procedure False [2018-06-22 15:11:42,330 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 15:11:42,330 INFO ]: Found specification of procedure state [2018-06-22 15:11:42,330 INFO ]: Found implementation of procedure state [2018-06-22 15:11:42,330 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 15:11:42,330 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 15:11:42,330 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 15:11:42,724 INFO ]: Using library mode [2018-06-22 15:11:42,724 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:11:42 BoogieIcfgContainer [2018-06-22 15:11:42,725 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 15:11:42,726 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 15:11:42,726 INFO ]: Initializing TraceAbstraction... [2018-06-22 15:11:42,729 INFO ]: TraceAbstraction initialized [2018-06-22 15:11:42,729 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:11:42" (1/3) ... [2018-06-22 15:11:42,730 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10960f4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 03:11:42, skipping insertion in model container [2018-06-22 15:11:42,731 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:11:42" (2/3) ... [2018-06-22 15:11:42,731 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10960f4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 03:11:42, skipping insertion in model container [2018-06-22 15:11:42,731 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:11:42" (3/3) ... [2018-06-22 15:11:42,733 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 15:11:42,743 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 15:11:42,753 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 15:11:42,803 INFO ]: Using default assertion order modulation [2018-06-22 15:11:42,804 INFO ]: Interprodecural is true [2018-06-22 15:11:42,804 INFO ]: Hoare is false [2018-06-22 15:11:42,804 INFO ]: Compute interpolants for FPandBP [2018-06-22 15:11:42,804 INFO ]: Backedges is TWOTRACK [2018-06-22 15:11:42,804 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 15:11:42,804 INFO ]: Difference is false [2018-06-22 15:11:42,804 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 15:11:42,804 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 15:11:42,824 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 15:11:42,833 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 15:11:42,833 INFO ]: Found error trace [2018-06-22 15:11:42,834 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:11:42,834 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:11:42,838 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 15:11:42,839 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:11:42,840 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:11:42,871 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:11:42,871 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:11:42,871 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:11:42,911 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:11:43,081 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 15:11:43,083 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 15:11:43,083 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 15:11:43,084 INFO ]: Interpolant automaton has 4 states [2018-06-22 15:11:43,095 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 15:11:43,096 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:11:43,097 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 15:11:43,232 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:11:43,232 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 15:11:43,233 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 15:11:43,233 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 15:11:43,234 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:11:43,242 INFO ]: With dead ends: 13 [2018-06-22 15:11:43,242 INFO ]: Without dead ends: 13 [2018-06-22 15:11:43,244 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 15:11:43,257 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 15:11:43,275 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 15:11:43,276 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 15:11:43,277 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 15:11:43,278 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 15:11:43,278 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:11:43,278 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 15:11:43,278 INFO ]: Interpolant automaton has 4 states. [2018-06-22 15:11:43,278 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 15:11:43,279 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 15:11:43,279 INFO ]: Found error trace [2018-06-22 15:11:43,280 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:11:43,280 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:11:43,280 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 15:11:43,280 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:11:43,280 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:11:43,281 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:11:43,281 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:11:43,281 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:11:43,427 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:11:43,912 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:11:43,912 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:11:43,912 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 15:11:43,920 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:11:44,003 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:11:44,015 INFO ]: Computing forward predicates... [2018-06-22 15:11:44,586 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:11:44,607 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:11:44,607 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 15:11:44,608 INFO ]: Interpolant automaton has 9 states [2018-06-22 15:11:44,608 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 15:11:44,608 INFO ]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-06-22 15:11:44,608 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 15:11:45,204 WARN ]: Spent 469.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2018-06-22 15:11:45,319 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:11:45,319 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 15:11:45,320 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 15:11:45,320 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 15:11:45,320 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:11:45,321 INFO ]: With dead ends: 15 [2018-06-22 15:11:45,321 INFO ]: Without dead ends: 15 [2018-06-22 15:11:45,321 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-06-22 15:11:45,321 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 15:11:45,325 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 15:11:45,325 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 15:11:45,326 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 15:11:45,326 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 15:11:45,326 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:11:45,326 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 15:11:45,326 INFO ]: Interpolant automaton has 9 states. [2018-06-22 15:11:45,326 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 15:11:45,326 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 15:11:45,326 INFO ]: Found error trace [2018-06-22 15:11:45,326 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:11:45,326 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:11:45,326 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 15:11:45,326 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:11:45,326 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:11:45,327 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:11:45,327 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:11:45,327 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:11:45,473 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:11:46,390 WARN ]: Spent 575.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 14 [2018-06-22 15:11:46,502 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:11:46,502 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:11:46,502 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 15:11:46,508 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:11:46,606 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:11:46,606 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:11:46,611 INFO ]: Computing forward predicates... [2018-06-22 15:11:46,887 WARN ]: Spent 165.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2018-06-22 15:11:47,037 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:11:47,059 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:11:47,059 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-06-22 15:11:47,059 INFO ]: Interpolant automaton has 11 states [2018-06-22 15:11:47,060 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-22 15:11:47,060 INFO ]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2018-06-22 15:11:47,060 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-06-22 15:11:47,274 WARN ]: Spent 158.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2018-06-22 15:11:47,501 WARN ]: Spent 106.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2018-06-22 15:11:47,535 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:11:47,535 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 15:11:47,535 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 15:11:47,535 INFO ]: Start accepts. Automaton has 11 states. Word has length 17 [2018-06-22 15:11:47,535 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:11:47,536 INFO ]: With dead ends: 17 [2018-06-22 15:11:47,536 INFO ]: Without dead ends: 17 [2018-06-22 15:11:47,536 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2018-06-22 15:11:47,536 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 15:11:47,539 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 15:11:47,539 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 15:11:47,539 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 15:11:47,539 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 15:11:47,539 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:11:47,540 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 15:11:47,540 INFO ]: Interpolant automaton has 11 states. [2018-06-22 15:11:47,540 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 15:11:47,540 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 15:11:47,540 INFO ]: Found error trace [2018-06-22 15:11:47,540 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:11:47,540 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:11:47,540 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 15:11:47,540 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:11:47,540 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:11:47,541 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:11:47,541 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:11:47,541 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:11:47,627 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:11:48,059 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:11:48,059 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:11:48,059 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 15:11:48,071 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 15:11:48,201 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 15:11:48,201 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:11:48,206 INFO ]: Computing forward predicates... [2018-06-22 15:11:48,444 WARN ]: Spent 127.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2018-06-22 15:11:48,714 WARN ]: Spent 224.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2018-06-22 15:11:49,115 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:11:49,137 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:11:49,137 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2018-06-22 15:11:49,137 INFO ]: Interpolant automaton has 15 states [2018-06-22 15:11:49,137 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-22 15:11:49,137 INFO ]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2018-06-22 15:11:49,138 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 15 states. [2018-06-22 15:11:49,491 WARN ]: Spent 308.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2018-06-22 15:11:49,795 WARN ]: Spent 181.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2018-06-22 15:11:50,022 WARN ]: Spent 183.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2018-06-22 15:11:50,045 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:11:50,046 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 15:11:50,046 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 15:11:50,046 INFO ]: Start accepts. Automaton has 15 states. Word has length 21 [2018-06-22 15:11:50,046 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:11:50,047 INFO ]: With dead ends: 19 [2018-06-22 15:11:50,047 INFO ]: Without dead ends: 19 [2018-06-22 15:11:50,047 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2018-06-22 15:11:50,047 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 15:11:50,050 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 15:11:50,050 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 15:11:50,051 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 15:11:50,051 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 15:11:50,051 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:11:50,051 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 15:11:50,051 INFO ]: Interpolant automaton has 15 states. [2018-06-22 15:11:50,051 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 15:11:50,052 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 15:11:50,052 INFO ]: Found error trace [2018-06-22 15:11:50,052 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:11:50,052 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:11:50,052 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-22 15:11:50,052 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:11:50,052 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:11:50,053 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:11:50,053 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:11:50,053 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:11:50,194 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:11:50,862 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:11:50,862 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:11:50,862 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 15:11:50,876 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 15:11:50,993 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 15:11:50,993 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:11:50,999 INFO ]: Computing forward predicates... [2018-06-22 15:11:51,323 WARN ]: Spent 114.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2018-06-22 15:11:51,461 WARN ]: Spent 114.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2018-06-22 15:11:52,490 WARN ]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-22 15:11:52,509 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:11:52,540 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:11:52,540 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2018-06-22 15:11:52,541 INFO ]: Interpolant automaton has 17 states [2018-06-22 15:11:52,541 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 15:11:52,541 INFO ]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2018-06-22 15:11:52,541 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 17 states. [2018-06-22 15:11:53,573 WARN ]: Spent 763.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2018-06-22 15:11:54,054 WARN ]: Spent 345.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2018-06-22 15:11:54,302 WARN ]: Spent 231.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2018-06-22 15:11:54,540 WARN ]: Spent 214.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2018-06-22 15:11:54,571 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:11:54,571 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 15:11:54,576 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 15:11:54,576 INFO ]: Start accepts. Automaton has 17 states. Word has length 25 [2018-06-22 15:11:54,576 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:11:54,577 INFO ]: With dead ends: 21 [2018-06-22 15:11:54,577 INFO ]: Without dead ends: 21 [2018-06-22 15:11:54,577 INFO ]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2018-06-22 15:11:54,577 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 15:11:54,582 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 15:11:54,582 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 15:11:54,583 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 15:11:54,583 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 15:11:54,583 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:11:54,583 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 15:11:54,583 INFO ]: Interpolant automaton has 17 states. [2018-06-22 15:11:54,583 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 15:11:54,584 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 15:11:54,584 INFO ]: Found error trace [2018-06-22 15:11:54,584 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:11:54,584 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:11:54,584 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 5 times [2018-06-22 15:11:54,584 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:11:54,584 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:11:54,584 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:11:54,584 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:11:54,584 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:11:54,723 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:11:55,418 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:11:55,418 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:11:55,418 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 15:11:55,425 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 15:11:55,584 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 15:11:55,584 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:11:55,592 INFO ]: Computing forward predicates... [2018-06-22 15:11:55,771 WARN ]: Spent 128.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2018-06-22 15:11:55,988 WARN ]: Spent 172.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2018-06-22 15:11:56,265 WARN ]: Spent 136.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2018-06-22 15:11:56,411 WARN ]: Spent 113.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2018-06-22 15:11:56,619 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:11:56,638 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:11:56,639 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2018-06-22 15:11:56,639 INFO ]: Interpolant automaton has 20 states [2018-06-22 15:11:56,639 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-22 15:11:56,639 INFO ]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2018-06-22 15:11:56,639 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 20 states. [2018-06-22 15:11:56,980 WARN ]: Spent 306.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2018-06-22 15:11:57,221 WARN ]: Spent 201.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 25 [2018-06-22 15:11:57,384 WARN ]: Spent 130.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 28 [2018-06-22 15:11:57,770 WARN ]: Spent 363.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2018-06-22 15:11:57,993 WARN ]: Spent 198.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2018-06-22 15:11:58,221 WARN ]: Spent 208.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 33 [2018-06-22 15:11:58,297 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:11:58,297 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 15:11:58,297 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 15:11:58,297 INFO ]: Start accepts. Automaton has 20 states. Word has length 29 [2018-06-22 15:11:58,297 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:11:58,298 INFO ]: With dead ends: 23 [2018-06-22 15:11:58,298 INFO ]: Without dead ends: 23 [2018-06-22 15:11:58,298 INFO ]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2018-06-22 15:11:58,298 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 15:11:58,310 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 15:11:58,310 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 15:11:58,311 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 15:11:58,311 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 15:11:58,311 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:11:58,311 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 15:11:58,311 INFO ]: Interpolant automaton has 20 states. [2018-06-22 15:11:58,311 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 15:11:58,312 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 15:11:58,312 INFO ]: Found error trace [2018-06-22 15:11:58,312 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:11:58,312 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:11:58,312 INFO ]: Analyzing trace with hash 800064122, now seen corresponding path program 6 times [2018-06-22 15:11:58,312 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:11:58,312 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:11:58,313 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:11:58,313 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:11:58,313 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:11:58,439 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:11:59,175 WARN ]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-06-22 15:11:59,579 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:11:59,579 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:11:59,579 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 15:11:59,584 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 15:11:59,767 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-22 15:11:59,767 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:11:59,776 INFO ]: Computing forward predicates... [2018-06-22 15:12:00,076 WARN ]: Spent 119.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2018-06-22 15:12:00,278 WARN ]: Spent 168.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2018-06-22 15:12:00,436 WARN ]: Spent 120.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2018-06-22 15:12:00,650 WARN ]: Spent 114.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2018-06-22 15:12:01,089 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:12:01,120 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:12:01,120 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2018-06-22 15:12:01,121 INFO ]: Interpolant automaton has 23 states [2018-06-22 15:12:01,121 INFO ]: Constructing interpolant automaton starting with 23 interpolants. [2018-06-22 15:12:01,121 INFO ]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2018-06-22 15:12:01,121 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 23 states. [2018-06-22 15:12:01,545 WARN ]: Spent 392.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2018-06-22 15:12:01,722 WARN ]: Spent 139.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 24 [2018-06-22 15:12:01,890 WARN ]: Spent 143.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 28 [2018-06-22 15:12:02,157 WARN ]: Spent 244.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2018-06-22 15:12:02,418 WARN ]: Spent 232.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2018-06-22 15:12:02,664 WARN ]: Spent 222.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 32 [2018-06-22 15:12:02,928 WARN ]: Spent 243.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 31 [2018-06-22 15:12:02,959 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:12:03,164 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 15:12:03,165 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 15:12:03,165 INFO ]: Start accepts. Automaton has 23 states. Word has length 33 [2018-06-22 15:12:03,166 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:12:03,167 INFO ]: With dead ends: 25 [2018-06-22 15:12:03,167 INFO ]: Without dead ends: 25 [2018-06-22 15:12:03,168 INFO ]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2018-06-22 15:12:03,168 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 15:12:03,176 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 15:12:03,176 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 15:12:03,177 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 15:12:03,177 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 33 [2018-06-22 15:12:03,177 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:12:03,177 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 15:12:03,177 INFO ]: Interpolant automaton has 23 states. [2018-06-22 15:12:03,177 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 15:12:03,178 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 15:12:03,178 INFO ]: Found error trace [2018-06-22 15:12:03,178 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:12:03,178 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:12:03,179 INFO ]: Analyzing trace with hash -411423458, now seen corresponding path program 7 times [2018-06-22 15:12:03,179 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:12:03,179 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:12:03,184 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:12:03,184 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:12:03,184 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:12:03,339 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:12:04,248 WARN ]: Spent 636.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2018-06-22 15:12:04,651 WARN ]: Spent 325.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2018-06-22 15:12:04,802 WARN ]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2018-06-22 15:12:05,299 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:12:05,300 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:12:05,300 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 15:12:05,307 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:12:05,530 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:12:05,541 INFO ]: Computing forward predicates... [2018-06-22 15:12:05,880 WARN ]: Spent 125.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2018-06-22 15:12:06,157 WARN ]: Spent 192.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2018-06-22 15:12:06,304 WARN ]: Spent 118.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2018-06-22 15:12:06,619 WARN ]: Spent 112.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2018-06-22 15:12:06,758 WARN ]: Spent 113.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2018-06-22 15:12:07,041 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:12:07,061 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:12:07,061 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2018-06-22 15:12:07,061 INFO ]: Interpolant automaton has 26 states [2018-06-22 15:12:07,061 INFO ]: Constructing interpolant automaton starting with 26 interpolants. [2018-06-22 15:12:07,062 INFO ]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2018-06-22 15:12:07,062 INFO ]: Start difference. First operand 25 states and 26 transitions. Second operand 26 states. [2018-06-22 15:12:07,385 WARN ]: Spent 281.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2018-06-22 15:12:07,528 WARN ]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 24 [2018-06-22 15:12:07,782 WARN ]: Spent 224.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2018-06-22 15:12:08,022 WARN ]: Spent 164.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 34 [2018-06-22 15:12:08,266 WARN ]: Spent 219.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 34 [2018-06-22 15:12:08,458 WARN ]: Spent 165.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 33 [2018-06-22 15:12:08,645 WARN ]: Spent 161.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 35 [2018-06-22 15:12:08,804 WARN ]: Spent 135.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 34 [2018-06-22 15:12:08,837 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:12:08,837 INFO ]: Finished difference Result 27 states and 28 transitions. [2018-06-22 15:12:08,837 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 15:12:08,837 INFO ]: Start accepts. Automaton has 26 states. Word has length 37 [2018-06-22 15:12:08,838 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:12:08,838 INFO ]: With dead ends: 27 [2018-06-22 15:12:08,838 INFO ]: Without dead ends: 27 [2018-06-22 15:12:08,839 INFO ]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2018-06-22 15:12:08,839 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-22 15:12:08,842 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-06-22 15:12:08,842 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-22 15:12:08,843 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-06-22 15:12:08,843 INFO ]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 37 [2018-06-22 15:12:08,847 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:12:08,847 INFO ]: Abstraction has 27 states and 28 transitions. [2018-06-22 15:12:08,847 INFO ]: Interpolant automaton has 26 states. [2018-06-22 15:12:08,847 INFO ]: Start isEmpty. Operand 27 states and 28 transitions. [2018-06-22 15:12:08,848 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 15:12:08,848 INFO ]: Found error trace [2018-06-22 15:12:08,848 INFO ]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:12:08,848 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:12:08,848 INFO ]: Analyzing trace with hash -544278078, now seen corresponding path program 8 times [2018-06-22 15:12:08,848 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:12:08,848 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:12:08,849 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:12:08,849 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:12:08,849 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:12:08,996 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:12:10,027 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 15:12:10,027 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:12:10,027 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:12:10,033 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:12:10,261 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:12:10,261 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:12:10,272 INFO ]: Computing forward predicates... [2018-06-22 15:12:10,496 WARN ]: Spent 134.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2018-06-22 15:12:10,725 WARN ]: Spent 175.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2018-06-22 15:12:11,458 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 15:12:11,478 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:12:11,478 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 24 [2018-06-22 15:12:11,479 INFO ]: Interpolant automaton has 24 states [2018-06-22 15:12:11,479 INFO ]: Constructing interpolant automaton starting with 24 interpolants. [2018-06-22 15:12:11,479 INFO ]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2018-06-22 15:12:11,479 INFO ]: Start difference. First operand 27 states and 28 transitions. Second operand 24 states. [2018-06-22 15:12:12,056 WARN ]: Spent 507.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2018-06-22 15:12:12,203 WARN ]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 27 [2018-06-22 15:12:12,410 WARN ]: Spent 169.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 31 [2018-06-22 15:12:12,647 WARN ]: Spent 208.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 36 [2018-06-22 15:12:12,895 WARN ]: Spent 207.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 36 [2018-06-22 15:12:13,138 WARN ]: Spent 214.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 35 [2018-06-22 15:12:13,407 WARN ]: Spent 242.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 32 [2018-06-22 15:12:13,585 WARN ]: Spent 150.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 35 [2018-06-22 15:12:13,844 WARN ]: Spent 228.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 36 [2018-06-22 15:12:13,877 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:12:13,878 INFO ]: Finished difference Result 29 states and 30 transitions. [2018-06-22 15:12:13,878 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 15:12:13,878 INFO ]: Start accepts. Automaton has 24 states. Word has length 41 [2018-06-22 15:12:13,878 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:12:13,879 INFO ]: With dead ends: 29 [2018-06-22 15:12:13,879 INFO ]: Without dead ends: 29 [2018-06-22 15:12:13,879 INFO ]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2018-06-22 15:12:13,879 INFO ]: Start minimizeSevpa. Operand 29 states. [2018-06-22 15:12:13,883 INFO ]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-06-22 15:12:13,883 INFO ]: Start removeUnreachable. Operand 29 states. [2018-06-22 15:12:13,884 INFO ]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-06-22 15:12:13,884 INFO ]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 41 [2018-06-22 15:12:13,884 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:12:13,884 INFO ]: Abstraction has 29 states and 30 transitions. [2018-06-22 15:12:13,884 INFO ]: Interpolant automaton has 24 states. [2018-06-22 15:12:13,884 INFO ]: Start isEmpty. Operand 29 states and 30 transitions. [2018-06-22 15:12:13,885 INFO ]: Finished isEmpty. Found accepting run of length 46 [2018-06-22 15:12:13,885 INFO ]: Found error trace [2018-06-22 15:12:13,885 INFO ]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:12:13,885 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:12:13,885 INFO ]: Analyzing trace with hash 1442343014, now seen corresponding path program 9 times [2018-06-22 15:12:13,885 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:12:13,885 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:12:13,886 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:12:13,886 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:12:13,886 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:12:14,199 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:12:14,573 WARN ]: Spent 107.00 ms on a formula simplification. DAG size of input: 4 DAG size of output: 1 [2018-06-22 15:12:15,467 INFO ]: Checked inductivity of 171 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 15:12:15,467 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:12:15,467 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:12:15,473 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 15:12:15,796 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-06-22 15:12:15,796 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:12:15,812 INFO ]: Computing forward predicates... [2018-06-22 15:12:16,715 WARN ]: Spent 737.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 59 [2018-06-22 15:12:17,163 WARN ]: Spent 351.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2018-06-22 15:12:17,338 WARN ]: Spent 135.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2018-06-22 15:12:17,473 WARN ]: Spent 103.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2018-06-22 15:12:17,650 WARN ]: Spent 140.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2018-06-22 15:12:17,892 WARN ]: Spent 201.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2018-06-22 15:12:18,184 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,194 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,205 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,218 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,226 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,233 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,239 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,246 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,256 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,259 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,264 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,268 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,272 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,278 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,282 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,286 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,292 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,297 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,303 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,308 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,314 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,318 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,323 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,326 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,333 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,337 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,343 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,350 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,354 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,360 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,366 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,370 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,375 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,380 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,383 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,388 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,393 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,399 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,404 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,411 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,417 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,436 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,441 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,446 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,452 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,457 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,462 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,467 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,474 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,481 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,485 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,497 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,500 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,503 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,506 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,510 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,513 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,515 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,518 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,521 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,524 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:18,527 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:12:23,468 INFO ]: Checked inductivity of 171 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 15:12:23,489 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:12:23,489 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 35 [2018-06-22 15:12:23,489 INFO ]: Interpolant automaton has 35 states [2018-06-22 15:12:23,490 INFO ]: Constructing interpolant automaton starting with 35 interpolants. [2018-06-22 15:12:23,490 INFO ]: CoverageRelationStatistics Valid=107, Invalid=1083, Unknown=0, NotChecked=0, Total=1190 [2018-06-22 15:12:23,490 INFO ]: Start difference. First operand 29 states and 30 transitions. Second operand 35 states. [2018-06-22 15:12:24,726 WARN ]: Spent 1.11 s on a formula simplification. DAG size of input: 127 DAG size of output: 104 [2018-06-22 15:12:25,492 WARN ]: Spent 693.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 64 [2018-06-22 15:12:26,337 WARN ]: Spent 801.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 72 [2018-06-22 15:12:27,226 WARN ]: Spent 830.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 78 [2018-06-22 15:12:28,030 WARN ]: Spent 757.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 85 [2018-06-22 15:12:28,858 WARN ]: Spent 775.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 77 [2018-06-22 15:12:29,809 WARN ]: Spent 901.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 80 [2018-06-22 15:12:30,703 WARN ]: Spent 845.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 79 [2018-06-22 15:12:31,697 WARN ]: Spent 946.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 80 [2018-06-22 15:12:32,620 WARN ]: Spent 873.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 79 [2018-06-22 15:12:32,676 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:12:32,676 INFO ]: Finished difference Result 31 states and 32 transitions. [2018-06-22 15:12:32,676 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-06-22 15:12:32,676 INFO ]: Start accepts. Automaton has 35 states. Word has length 45 [2018-06-22 15:12:32,677 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:12:32,678 INFO ]: With dead ends: 31 [2018-06-22 15:12:32,678 INFO ]: Without dead ends: 31 [2018-06-22 15:12:32,679 INFO ]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=313, Invalid=1757, Unknown=0, NotChecked=0, Total=2070 [2018-06-22 15:12:32,679 INFO ]: Start minimizeSevpa. Operand 31 states. [2018-06-22 15:12:32,682 INFO ]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-06-22 15:12:32,682 INFO ]: Start removeUnreachable. Operand 31 states. [2018-06-22 15:12:32,684 INFO ]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-06-22 15:12:32,684 INFO ]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 45 [2018-06-22 15:12:32,685 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:12:32,685 INFO ]: Abstraction has 31 states and 32 transitions. [2018-06-22 15:12:32,685 INFO ]: Interpolant automaton has 35 states. [2018-06-22 15:12:32,685 INFO ]: Start isEmpty. Operand 31 states and 32 transitions. [2018-06-22 15:12:32,686 INFO ]: Finished isEmpty. Found accepting run of length 50 [2018-06-22 15:12:32,686 INFO ]: Found error trace [2018-06-22 15:12:32,686 INFO ]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:12:32,686 INFO ]: === Iteration 11 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:12:32,686 INFO ]: Analyzing trace with hash 352352522, now seen corresponding path program 10 times [2018-06-22 15:12:32,686 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:12:32,686 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:12:32,686 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:12:32,686 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:12:32,687 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:12:33,005 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:12:34,083 WARN ]: Spent 681.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2018-06-22 15:12:35,012 INFO ]: Checked inductivity of 210 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-06-22 15:12:35,012 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:12:35,012 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:12:35,018 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 15:12:35,321 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 15:12:35,321 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:12:35,341 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-22 15:12:41,816 INFO ]: Timeout while computing interpolants [2018-06-22 15:12:42,017 WARN ]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:12:42,017 WARN ]: Verification canceled [2018-06-22 15:12:42,020 WARN ]: Timeout [2018-06-22 15:12:42,021 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 03:12:42 BoogieIcfgContainer [2018-06-22 15:12:42,021 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 15:12:42,021 INFO ]: Toolchain (without parser) took 59873.50 ms. Allocated memory was 308.8 MB in the beginning and 1.3 GB in the end (delta: 959.4 MB). Free memory was 235.3 MB in the beginning and 426.2 MB in the end (delta: -190.9 MB). Peak memory consumption was 914.7 MB. Max. memory is 3.6 GB. [2018-06-22 15:12:42,022 INFO ]: SmtParser took 0.06 ms. Allocated memory is still 308.8 MB. Free memory is still 274.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 15:12:42,022 INFO ]: ChcToBoogie took 58.36 ms. Allocated memory is still 308.8 MB. Free memory was 234.3 MB in the beginning and 232.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:12:42,022 INFO ]: Boogie Preprocessor took 95.07 ms. Allocated memory is still 308.8 MB. Free memory was 232.3 MB in the beginning and 230.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:12:42,023 INFO ]: RCFGBuilder took 414.62 ms. Allocated memory is still 308.8 MB. Free memory was 230.3 MB in the beginning and 204.5 MB in the end (delta: 25.8 MB). Peak memory consumption was 25.8 MB. Max. memory is 3.6 GB. [2018-06-22 15:12:42,023 INFO ]: TraceAbstraction took 59294.69 ms. Allocated memory was 308.8 MB in the beginning and 1.3 GB in the end (delta: 959.4 MB). Free memory was 204.5 MB in the beginning and 426.2 MB in the end (delta: -221.7 MB). Peak memory consumption was 883.9 MB. Max. memory is 3.6 GB. [2018-06-22 15:12:42,025 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 308.8 MB. Free memory is still 274.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 58.36 ms. Allocated memory is still 308.8 MB. Free memory was 234.3 MB in the beginning and 232.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 95.07 ms. Allocated memory is still 308.8 MB. Free memory was 232.3 MB in the beginning and 230.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 414.62 ms. Allocated memory is still 308.8 MB. Free memory was 230.3 MB in the beginning and 204.5 MB in the end (delta: 25.8 MB). Peak memory consumption was 25.8 MB. Max. memory is 3.6 GB. * TraceAbstraction took 59294.69 ms. Allocated memory was 308.8 MB in the beginning and 1.3 GB in the end (delta: 959.4 MB). Free memory was 204.5 MB in the beginning and 426.2 MB in the end (delta: -221.7 MB). Peak memory consumption was 883.9 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 50 with TraceHistMax 11, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 5 quantified variables from 23 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 59.2s OverallTime, 11 OverallIterations, 11 TraceHistogramMax, 21.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 146 SDtfs, 472 SDslu, 1008 SDs, 0 SdLazy, 921 SolverSat, 556 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 440 GetRequests, 195 SyntacticMatches, 23 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 35.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=10, 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, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 25.0s InterpolantComputationTime, 531 NumberOfCodeBlocks, 531 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 512 ConstructedInterpolants, 0 QuantifiedInterpolants, 574728 SizeOfPredicates, 1022 NumberOfNonLiveVariables, 7479 ConjunctsInSsa, 544 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 330/1230 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/lifo.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_15-12-42-035.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/lifo.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_15-12-42-035.csv Completed graceful shutdown