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/dillig15.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:56:00,243 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:56:00,246 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:56:00,261 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:56:00,261 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:56:00,262 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:56:00,263 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:56:00,266 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:56:00,267 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:56:00,269 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:56:00,270 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:56:00,270 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:56:00,271 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:56:00,274 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:56:00,275 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:56:00,276 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:56:00,278 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:56:00,281 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:56:00,283 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:56:00,284 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:56:00,285 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:56:00,287 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:56:00,287 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:56:00,288 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:56:00,288 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:56:00,289 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:56:00,290 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:56:00,291 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:56:00,292 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:56:00,292 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:56:00,293 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:56:00,293 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:56:00,294 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:56:00,294 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:56:00,295 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:56:00,295 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 14:56:00,308 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:56:00,308 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:56:00,308 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:56:00,309 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:56:00,310 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:56:00,310 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:56:00,310 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:56:00,310 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:56:00,310 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:56:00,311 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:56:00,311 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:56:00,311 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:56:00,311 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:56:00,311 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:56:00,312 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:56:00,312 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:56:00,312 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:56:00,312 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:56:00,312 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:56:00,314 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:56:00,314 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:56:00,353 INFO ]: Repository-Root is: /tmp [2018-06-22 14:56:00,367 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:56:00,371 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:56:00,372 INFO ]: Initializing SmtParser... [2018-06-22 14:56:00,373 INFO ]: SmtParser initialized [2018-06-22 14:56:00,373 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig15.c.smt2 [2018-06-22 14:56:00,375 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 14:56:00,466 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig15.c.smt2 unknown [2018-06-22 14:56:00,723 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig15.c.smt2 [2018-06-22 14:56:00,727 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:56:00,732 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:56:00,733 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:56:00,733 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:56:00,733 INFO ]: ChcToBoogie initialized [2018-06-22 14:56:00,737 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:56:00" (1/1) ... [2018-06-22 14:56:00,784 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:56:00 Unit [2018-06-22 14:56:00,784 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:56:00,785 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:56:00,785 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:56:00,785 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:56:00,806 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:56:00" (1/1) ... [2018-06-22 14:56:00,807 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:56:00" (1/1) ... [2018-06-22 14:56:00,815 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:56:00" (1/1) ... [2018-06-22 14:56:00,815 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:56:00" (1/1) ... [2018-06-22 14:56:00,818 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:56:00" (1/1) ... [2018-06-22 14:56:00,819 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:56:00" (1/1) ... [2018-06-22 14:56:00,820 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:56:00" (1/1) ... [2018-06-22 14:56:00,822 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:56:00,823 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:56:00,823 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:56:00,823 INFO ]: RCFGBuilder initialized [2018-06-22 14:56:00,823 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:56:00" (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 14:56:00,849 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:56:00,849 INFO ]: Found specification of procedure False [2018-06-22 14:56:00,849 INFO ]: Found implementation of procedure False [2018-06-22 14:56:00,849 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:56:00,849 INFO ]: Found specification of procedure state [2018-06-22 14:56:00,849 INFO ]: Found implementation of procedure state [2018-06-22 14:56:00,849 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:56:00,849 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:56:00,849 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 14:56:01,071 INFO ]: Using library mode [2018-06-22 14:56:01,072 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:56:01 BoogieIcfgContainer [2018-06-22 14:56:01,072 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:56:01,073 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:56:01,073 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:56:01,086 INFO ]: TraceAbstraction initialized [2018-06-22 14:56:01,086 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:56:00" (1/3) ... [2018-06-22 14:56:01,087 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56654bd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:56:01, skipping insertion in model container [2018-06-22 14:56:01,087 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:56:00" (2/3) ... [2018-06-22 14:56:01,087 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56654bd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:56:01, skipping insertion in model container [2018-06-22 14:56:01,087 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:56:01" (3/3) ... [2018-06-22 14:56:01,089 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:56:01,103 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:56:01,117 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:56:01,151 INFO ]: Using default assertion order modulation [2018-06-22 14:56:01,152 INFO ]: Interprodecural is true [2018-06-22 14:56:01,152 INFO ]: Hoare is false [2018-06-22 14:56:01,152 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:56:01,152 INFO ]: Backedges is TWOTRACK [2018-06-22 14:56:01,152 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:56:01,152 INFO ]: Difference is false [2018-06-22 14:56:01,152 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:56:01,152 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:56:01,165 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:56:01,174 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:56:01,174 INFO ]: Found error trace [2018-06-22 14:56:01,175 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:56:01,175 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:56:01,179 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 14:56:01,180 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:56:01,180 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:56:01,211 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:56:01,211 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:56:01,211 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:56:01,234 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:56:01,330 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:56:01,332 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:56:01,332 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:56:01,333 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:56:01,344 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:56:01,344 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:56:01,346 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:56:01,433 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:56:01,433 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:56:01,434 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:56:01,435 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:56:01,435 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:56:01,445 INFO ]: With dead ends: 13 [2018-06-22 14:56:01,445 INFO ]: Without dead ends: 13 [2018-06-22 14:56:01,446 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 14:56:01,459 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:56:01,480 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:56:01,481 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:56:01,482 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:56:01,483 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:56:01,483 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:56:01,483 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:56:01,483 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:56:01,483 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:56:01,484 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:56:01,484 INFO ]: Found error trace [2018-06-22 14:56:01,484 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:56:01,484 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:56:01,484 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 14:56:01,484 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:56:01,484 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:56:01,485 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:56:01,485 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:56:01,485 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:56:01,521 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:56:01,674 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:56:01,674 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:56:01,674 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 14:56:01,687 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:56:01,729 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:56:01,737 INFO ]: Computing forward predicates... [2018-06-22 14:56:02,188 WARN ]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 14:56:02,345 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:56:02,365 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:56:02,365 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 14:56:02,366 INFO ]: Interpolant automaton has 9 states [2018-06-22 14:56:02,366 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 14:56:02,366 INFO ]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-06-22 14:56:02,366 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 14:56:02,648 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:56:02,648 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 14:56:02,650 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 14:56:02,650 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 14:56:02,650 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:56:02,651 INFO ]: With dead ends: 15 [2018-06-22 14:56:02,651 INFO ]: Without dead ends: 15 [2018-06-22 14:56:02,652 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2018-06-22 14:56:02,652 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 14:56:02,654 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 14:56:02,654 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 14:56:02,655 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 14:56:02,655 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 14:56:02,655 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:56:02,655 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 14:56:02,655 INFO ]: Interpolant automaton has 9 states. [2018-06-22 14:56:02,655 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 14:56:02,656 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 14:56:02,656 INFO ]: Found error trace [2018-06-22 14:56:02,656 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:56:02,656 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:56:02,656 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 14:56:02,656 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:56:02,656 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:56:02,657 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:56:02,657 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:56:02,657 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:56:02,697 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:56:03,050 WARN ]: Spent 192.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 13 [2018-06-22 14:56:03,192 WARN ]: Spent 126.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2018-06-22 14:56:03,354 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:56:03,354 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:56:03,378 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) [2018-06-22 14:56:03,386 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:56:03,434 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:56:03,434 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:56:03,438 INFO ]: Computing forward predicates... [2018-06-22 14:56:03,873 WARN ]: Spent 343.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2018-06-22 14:56:04,052 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:56:04,076 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:56:04,076 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-06-22 14:56:04,077 INFO ]: Interpolant automaton has 11 states [2018-06-22 14:56:04,077 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-22 14:56:04,077 INFO ]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-06-22 14:56:04,077 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-06-22 14:56:04,249 WARN ]: Spent 120.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 23 [2018-06-22 14:56:04,412 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:56:04,412 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 14:56:04,412 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:56:04,412 INFO ]: Start accepts. Automaton has 11 states. Word has length 17 [2018-06-22 14:56:04,412 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:56:04,413 INFO ]: With dead ends: 17 [2018-06-22 14:56:04,413 INFO ]: Without dead ends: 17 [2018-06-22 14:56:04,413 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-06-22 14:56:04,413 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 14:56:04,416 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 14:56:04,416 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 14:56:04,417 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 14:56:04,417 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 14:56:04,417 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:56:04,417 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 14:56:04,417 INFO ]: Interpolant automaton has 11 states. [2018-06-22 14:56:04,417 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 14:56:04,418 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 14:56:04,418 INFO ]: Found error trace [2018-06-22 14:56:04,418 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:56:04,418 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:56:04,418 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 14:56:04,418 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:56:04,418 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:56:04,419 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:56:04,419 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:56:04,419 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:56:04,459 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:56:04,747 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:56:04,747 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:56:04,747 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 14:56:04,764 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 14:56:04,791 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 14:56:04,791 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:56:04,795 INFO ]: Computing forward predicates... [2018-06-22 14:56:14,633 WARN ]: Spent 8.39 s on a formula simplification. DAG size of input: 791 DAG size of output: 38 [2018-06-22 14:56:15,859 WARN ]: Spent 159.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 9 [2018-06-22 14:56:15,880 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:56:15,912 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:56:15,912 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2018-06-22 14:56:15,913 INFO ]: Interpolant automaton has 15 states [2018-06-22 14:56:15,913 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-22 14:56:15,913 INFO ]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2018-06-22 14:56:15,913 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 15 states. [2018-06-22 14:56:16,297 WARN ]: Spent 284.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2018-06-22 14:56:16,426 WARN ]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 28 [2018-06-22 14:56:16,616 WARN ]: Spent 167.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2018-06-22 14:56:16,803 WARN ]: Spent 170.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2018-06-22 14:56:17,122 WARN ]: Spent 303.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2018-06-22 14:56:17,142 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:56:17,142 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 14:56:17,142 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 14:56:17,142 INFO ]: Start accepts. Automaton has 15 states. Word has length 21 [2018-06-22 14:56:17,142 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:56:17,143 INFO ]: With dead ends: 21 [2018-06-22 14:56:17,143 INFO ]: Without dead ends: 21 [2018-06-22 14:56:17,143 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2018-06-22 14:56:17,143 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 14:56:17,148 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 14:56:17,148 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 14:56:17,148 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 14:56:17,148 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 21 [2018-06-22 14:56:17,149 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:56:17,149 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 14:56:17,149 INFO ]: Interpolant automaton has 15 states. [2018-06-22 14:56:17,149 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 14:56:17,149 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 14:56:17,149 INFO ]: Found error trace [2018-06-22 14:56:17,149 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:56:17,150 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:56:17,150 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 4 times [2018-06-22 14:56:17,150 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:56:17,150 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:56:17,151 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:56:17,153 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:56:17,153 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:56:17,220 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:56:17,545 WARN ]: Spent 168.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2018-06-22 14:56:17,873 WARN ]: Spent 252.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2018-06-22 14:56:18,159 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 14:56:18,159 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:56:18,160 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 14:56:18,166 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 14:56:18,199 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 14:56:18,199 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:56:18,203 INFO ]: Computing forward predicates... [2018-06-22 14:56:19,251 WARN ]: Spent 518.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2018-06-22 14:56:20,274 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 14:56:20,298 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:56:20,298 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2018-06-22 14:56:20,298 INFO ]: Interpolant automaton has 25 states [2018-06-22 14:56:20,299 INFO ]: Constructing interpolant automaton starting with 25 interpolants. [2018-06-22 14:56:20,299 INFO ]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2018-06-22 14:56:20,299 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 25 states. [2018-06-22 14:56:20,590 WARN ]: Spent 262.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2018-06-22 14:56:20,753 WARN ]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 30 [2018-06-22 14:56:20,955 WARN ]: Spent 178.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 36 [2018-06-22 14:56:21,202 WARN ]: Spent 212.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2018-06-22 14:56:21,373 WARN ]: Spent 149.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 33 [2018-06-22 14:56:21,628 WARN ]: Spent 226.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2018-06-22 14:56:21,669 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:56:21,669 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 14:56:21,670 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 14:56:21,670 INFO ]: Start accepts. Automaton has 25 states. Word has length 29 [2018-06-22 14:56:21,670 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:56:21,670 INFO ]: With dead ends: 23 [2018-06-22 14:56:21,670 INFO ]: Without dead ends: 23 [2018-06-22 14:56:21,671 INFO ]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=177, Invalid=753, Unknown=0, NotChecked=0, Total=930 [2018-06-22 14:56:21,671 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 14:56:21,674 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 14:56:21,674 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 14:56:21,676 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 14:56:21,676 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 14:56:21,676 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:56:21,676 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 14:56:21,676 INFO ]: Interpolant automaton has 25 states. [2018-06-22 14:56:21,676 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 14:56:21,677 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 14:56:21,677 INFO ]: Found error trace [2018-06-22 14:56:21,677 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:56:21,677 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:56:21,677 INFO ]: Analyzing trace with hash -1661294575, now seen corresponding path program 5 times [2018-06-22 14:56:21,677 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:56:21,677 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:56:21,678 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:56:21,678 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:56:21,678 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:56:21,770 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:56:22,543 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 14:56:22,543 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:56:22,543 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 14:56:22,551 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 14:56:22,592 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-06-22 14:56:22,592 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:56:22,596 INFO ]: Computing forward predicates... [2018-06-22 14:56:23,442 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 14:56:23,475 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:56:23,475 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2018-06-22 14:56:23,475 INFO ]: Interpolant automaton has 25 states [2018-06-22 14:56:23,476 INFO ]: Constructing interpolant automaton starting with 25 interpolants. [2018-06-22 14:56:23,476 INFO ]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2018-06-22 14:56:23,476 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 25 states. [2018-06-22 14:56:23,893 WARN ]: Spent 320.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2018-06-22 14:56:24,212 WARN ]: Spent 168.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 36 [2018-06-22 14:56:24,424 WARN ]: Spent 187.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 39 [2018-06-22 14:56:24,706 WARN ]: Spent 257.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2018-06-22 14:56:25,002 WARN ]: Spent 269.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 35 [2018-06-22 14:56:25,210 WARN ]: Spent 185.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 31 [2018-06-22 14:56:25,477 WARN ]: Spent 237.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2018-06-22 14:56:25,519 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:56:25,530 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 14:56:25,531 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 14:56:25,531 INFO ]: Start accepts. Automaton has 25 states. Word has length 33 [2018-06-22 14:56:25,531 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:56:25,532 INFO ]: With dead ends: 25 [2018-06-22 14:56:25,532 INFO ]: Without dead ends: 25 [2018-06-22 14:56:25,532 INFO ]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2018-06-22 14:56:25,532 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 14:56:25,536 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 14:56:25,536 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 14:56:25,536 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 14:56:25,536 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 33 [2018-06-22 14:56:25,537 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:56:25,537 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 14:56:25,537 INFO ]: Interpolant automaton has 25 states. [2018-06-22 14:56:25,537 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 14:56:25,537 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 14:56:25,537 INFO ]: Found error trace [2018-06-22 14:56:25,538 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:56:25,538 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:56:25,538 INFO ]: Analyzing trace with hash -1494134477, now seen corresponding path program 6 times [2018-06-22 14:56:25,538 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:56:25,538 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:56:25,539 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:56:25,539 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:56:25,539 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:56:25,581 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:56:26,168 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 14:56:26,168 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:56:26,168 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 14:56:26,182 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 14:56:26,240 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-06-22 14:56:26,240 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:56:26,244 INFO ]: Computing forward predicates... [2018-06-22 14:56:27,122 WARN ]: Spent 778.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 55 [2018-06-22 14:56:27,421 WARN ]: Spent 109.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2018-06-22 14:56:28,106 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 14:56:28,125 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:56:28,126 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2018-06-22 14:56:28,126 INFO ]: Interpolant automaton has 28 states [2018-06-22 14:56:28,126 INFO ]: Constructing interpolant automaton starting with 28 interpolants. [2018-06-22 14:56:28,127 INFO ]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2018-06-22 14:56:28,127 INFO ]: Start difference. First operand 25 states and 26 transitions. Second operand 28 states. [2018-06-22 14:56:28,963 WARN ]: Spent 784.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 82 [2018-06-22 14:56:29,282 WARN ]: Spent 261.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 35 [2018-06-22 14:56:29,796 WARN ]: Spent 485.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 47 [2018-06-22 14:56:30,224 WARN ]: Spent 395.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 42 [2018-06-22 14:56:30,592 WARN ]: Spent 338.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 37 [2018-06-22 14:56:30,848 WARN ]: Spent 227.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 30 [2018-06-22 14:56:31,218 WARN ]: Spent 340.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 29 [2018-06-22 14:56:31,647 WARN ]: Spent 394.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2018-06-22 14:56:32,466 WARN ]: Spent 778.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 82 [2018-06-22 14:56:32,513 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:56:32,513 INFO ]: Finished difference Result 29 states and 30 transitions. [2018-06-22 14:56:32,515 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 14:56:32,515 INFO ]: Start accepts. Automaton has 28 states. Word has length 37 [2018-06-22 14:56:32,515 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:56:32,516 INFO ]: With dead ends: 29 [2018-06-22 14:56:32,516 INFO ]: Without dead ends: 29 [2018-06-22 14:56:32,517 INFO ]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=251, Invalid=1155, Unknown=0, NotChecked=0, Total=1406 [2018-06-22 14:56:32,517 INFO ]: Start minimizeSevpa. Operand 29 states. [2018-06-22 14:56:32,520 INFO ]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-06-22 14:56:32,520 INFO ]: Start removeUnreachable. Operand 29 states. [2018-06-22 14:56:32,521 INFO ]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-06-22 14:56:32,521 INFO ]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 37 [2018-06-22 14:56:32,522 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:56:32,522 INFO ]: Abstraction has 29 states and 30 transitions. [2018-06-22 14:56:32,522 INFO ]: Interpolant automaton has 28 states. [2018-06-22 14:56:32,522 INFO ]: Start isEmpty. Operand 29 states and 30 transitions. [2018-06-22 14:56:32,523 INFO ]: Finished isEmpty. Found accepting run of length 46 [2018-06-22 14:56:32,523 INFO ]: Found error trace [2018-06-22 14:56:32,523 INFO ]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:56:32,523 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:56:32,523 INFO ]: Analyzing trace with hash 996918775, now seen corresponding path program 7 times [2018-06-22 14:56:32,523 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:56:32,523 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:56:32,524 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:56:32,524 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:56:32,524 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:56:32,632 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:56:33,355 WARN ]: Spent 435.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-06-22 14:56:33,682 WARN ]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-06-22 14:56:34,463 INFO ]: Checked inductivity of 171 backedges. 1 proven. 125 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 14:56:34,463 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:56:34,463 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 14:56:34,470 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:56:34,527 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:56:34,533 INFO ]: Computing forward predicates... [2018-06-22 14:56:34,792 WARN ]: Spent 149.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 26 [2018-06-22 14:56:35,324 WARN ]: Spent 101.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2018-06-22 14:56:36,006 INFO ]: Checked inductivity of 171 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 14:56:36,025 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:56:36,025 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2018-06-22 14:56:36,025 INFO ]: Interpolant automaton has 38 states [2018-06-22 14:56:36,026 INFO ]: Constructing interpolant automaton starting with 38 interpolants. [2018-06-22 14:56:36,026 INFO ]: CoverageRelationStatistics Valid=129, Invalid=1277, Unknown=0, NotChecked=0, Total=1406 [2018-06-22 14:56:36,026 INFO ]: Start difference. First operand 29 states and 30 transitions. Second operand 38 states. [2018-06-22 14:56:36,817 WARN ]: Spent 715.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 80 [2018-06-22 14:56:37,043 WARN ]: Spent 156.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 30 [2018-06-22 14:56:37,349 WARN ]: Spent 254.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 43 [2018-06-22 14:56:37,668 WARN ]: Spent 280.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 47 [2018-06-22 14:56:37,944 WARN ]: Spent 201.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 32 [2018-06-22 14:56:38,234 WARN ]: Spent 208.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 33 [2018-06-22 14:56:38,489 WARN ]: Spent 218.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 33 [2018-06-22 14:56:38,799 WARN ]: Spent 268.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 46 [2018-06-22 14:56:39,098 WARN ]: Spent 261.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 48 [2018-06-22 14:56:39,663 WARN ]: Spent 523.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 76 [2018-06-22 14:56:39,708 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:56:39,708 INFO ]: Finished difference Result 31 states and 32 transitions. [2018-06-22 14:56:39,708 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-06-22 14:56:39,708 INFO ]: Start accepts. Automaton has 38 states. Word has length 45 [2018-06-22 14:56:39,709 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:56:39,709 INFO ]: With dead ends: 31 [2018-06-22 14:56:39,709 INFO ]: Without dead ends: 31 [2018-06-22 14:56:39,710 INFO ]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=376, Invalid=1976, Unknown=0, NotChecked=0, Total=2352 [2018-06-22 14:56:39,710 INFO ]: Start minimizeSevpa. Operand 31 states. [2018-06-22 14:56:39,713 INFO ]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-06-22 14:56:39,714 INFO ]: Start removeUnreachable. Operand 31 states. [2018-06-22 14:56:39,714 INFO ]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-06-22 14:56:39,714 INFO ]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 45 [2018-06-22 14:56:39,714 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:56:39,714 INFO ]: Abstraction has 31 states and 32 transitions. [2018-06-22 14:56:39,715 INFO ]: Interpolant automaton has 38 states. [2018-06-22 14:56:39,715 INFO ]: Start isEmpty. Operand 31 states and 32 transitions. [2018-06-22 14:56:39,716 INFO ]: Finished isEmpty. Found accepting run of length 50 [2018-06-22 14:56:39,716 INFO ]: Found error trace [2018-06-22 14:56:39,716 INFO ]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:56:39,716 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:56:39,716 INFO ]: Analyzing trace with hash -570306151, now seen corresponding path program 8 times [2018-06-22 14:56:39,716 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:56:39,716 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:56:39,716 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:56:39,716 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:56:39,716 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:56:39,830 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:56:40,094 WARN ]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2018-06-22 14:56:41,149 INFO ]: Checked inductivity of 210 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-06-22 14:56:41,149 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:56:41,215 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 14:56:41,221 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 14:56:41,289 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:56:41,289 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:56:41,296 INFO ]: Computing forward predicates... [2018-06-22 14:56:43,342 WARN ]: Spent 1.78 s on a formula simplification. DAG size of input: 360 DAG size of output: 57 [2018-06-22 14:56:43,610 WARN ]: Spent 219.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 31 [2018-06-22 14:56:45,378 WARN ]: Spent 1.11 s on a formula simplification. DAG size of input: 112 DAG size of output: 91 [2018-06-22 14:56:46,096 WARN ]: Spent 645.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2018-06-22 14:56:47,033 WARN ]: Spent 621.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 36 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown