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/nest-if4.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 15:20:37,333 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 15:20:37,336 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 15:20:37,350 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 15:20:37,350 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 15:20:37,353 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 15:20:37,354 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 15:20:37,356 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 15:20:37,358 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 15:20:37,359 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 15:20:37,360 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 15:20:37,361 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 15:20:37,361 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 15:20:37,362 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 15:20:37,363 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 15:20:37,364 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 15:20:37,368 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 15:20:37,369 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 15:20:37,378 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 15:20:37,379 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 15:20:37,380 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 15:20:37,382 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 15:20:37,383 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 15:20:37,386 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 15:20:37,387 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 15:20:37,387 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 15:20:37,388 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 15:20:37,389 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 15:20:37,391 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 15:20:37,392 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 15:20:37,392 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 15:20:37,393 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 15:20:37,393 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 15:20:37,394 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 15:20:37,394 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 15:20:37,395 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 15:20:37,413 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 15:20:37,413 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 15:20:37,414 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 15:20:37,414 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 15:20:37,415 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 15:20:37,415 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 15:20:37,416 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 15:20:37,416 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 15:20:37,416 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 15:20:37,416 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 15:20:37,416 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:20:37,416 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 15:20:37,417 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 15:20:37,417 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 15:20:37,417 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 15:20:37,417 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 15:20:37,417 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 15:20:37,417 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 15:20:37,418 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 15:20:37,421 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 15:20:37,422 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 15:20:37,476 INFO ]: Repository-Root is: /tmp [2018-06-22 15:20:37,492 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 15:20:37,497 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 15:20:37,498 INFO ]: Initializing SmtParser... [2018-06-22 15:20:37,499 INFO ]: SmtParser initialized [2018-06-22 15:20:37,500 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if4.c.smt2 [2018-06-22 15:20:37,501 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 15:20:37,587 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if4.c.smt2 unknown [2018-06-22 15:20:37,868 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if4.c.smt2 [2018-06-22 15:20:37,873 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 15:20:37,878 INFO ]: Walking toolchain with 4 elements. [2018-06-22 15:20:37,879 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 15:20:37,879 INFO ]: Initializing ChcToBoogie... [2018-06-22 15:20:37,879 INFO ]: ChcToBoogie initialized [2018-06-22 15:20:37,882 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:20:37" (1/1) ... [2018-06-22 15:20:37,921 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:20:37 Unit [2018-06-22 15:20:37,921 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 15:20:37,922 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 15:20:37,922 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 15:20:37,922 INFO ]: Boogie Preprocessor initialized [2018-06-22 15:20:37,941 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:20:37" (1/1) ... [2018-06-22 15:20:37,941 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:20:37" (1/1) ... [2018-06-22 15:20:37,950 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:20:37" (1/1) ... [2018-06-22 15:20:37,950 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:20:37" (1/1) ... [2018-06-22 15:20:37,964 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:20:37" (1/1) ... [2018-06-22 15:20:37,965 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:20:37" (1/1) ... [2018-06-22 15:20:37,966 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:20:37" (1/1) ... [2018-06-22 15:20:37,968 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 15:20:37,968 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 15:20:37,968 INFO ]: Initializing RCFGBuilder... [2018-06-22 15:20:37,969 INFO ]: RCFGBuilder initialized [2018-06-22 15:20:37,978 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:20:37" (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 15:20:37,995 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 15:20:37,995 INFO ]: Found specification of procedure False [2018-06-22 15:20:37,995 INFO ]: Found implementation of procedure False [2018-06-22 15:20:37,995 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 15:20:37,995 INFO ]: Found specification of procedure state [2018-06-22 15:20:37,995 INFO ]: Found implementation of procedure state [2018-06-22 15:20:37,996 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 15:20:37,996 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 15:20:37,996 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 15:20:38,223 INFO ]: Using library mode [2018-06-22 15:20:38,224 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:20:38 BoogieIcfgContainer [2018-06-22 15:20:38,224 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 15:20:38,226 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 15:20:38,227 INFO ]: Initializing TraceAbstraction... [2018-06-22 15:20:38,230 INFO ]: TraceAbstraction initialized [2018-06-22 15:20:38,231 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:20:37" (1/3) ... [2018-06-22 15:20:38,232 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a114a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 03:20:38, skipping insertion in model container [2018-06-22 15:20:38,232 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:20:37" (2/3) ... [2018-06-22 15:20:38,232 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a114a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 03:20:38, skipping insertion in model container [2018-06-22 15:20:38,232 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:20:38" (3/3) ... [2018-06-22 15:20:38,234 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 15:20:38,241 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 15:20:38,247 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 15:20:38,281 INFO ]: Using default assertion order modulation [2018-06-22 15:20:38,281 INFO ]: Interprodecural is true [2018-06-22 15:20:38,281 INFO ]: Hoare is false [2018-06-22 15:20:38,281 INFO ]: Compute interpolants for FPandBP [2018-06-22 15:20:38,281 INFO ]: Backedges is TWOTRACK [2018-06-22 15:20:38,281 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 15:20:38,281 INFO ]: Difference is false [2018-06-22 15:20:38,281 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 15:20:38,281 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 15:20:38,293 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 15:20:38,302 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 15:20:38,302 INFO ]: Found error trace [2018-06-22 15:20:38,302 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:20:38,303 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:20:38,306 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 15:20:38,307 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:20:38,308 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:20:38,338 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:20:38,338 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:20:38,338 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:20:38,363 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:20:38,445 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 15:20:38,448 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 15:20:38,448 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 15:20:38,450 INFO ]: Interpolant automaton has 4 states [2018-06-22 15:20:38,465 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 15:20:38,465 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:20:38,468 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 15:20:38,595 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:20:38,595 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 15:20:38,595 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 15:20:38,597 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 15:20:38,597 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:20:38,608 INFO ]: With dead ends: 13 [2018-06-22 15:20:38,608 INFO ]: Without dead ends: 13 [2018-06-22 15:20:38,610 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 15:20:38,627 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 15:20:38,665 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 15:20:38,666 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 15:20:38,667 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 15:20:38,669 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 15:20:38,669 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:20:38,669 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 15:20:38,669 INFO ]: Interpolant automaton has 4 states. [2018-06-22 15:20:38,669 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 15:20:38,670 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 15:20:38,670 INFO ]: Found error trace [2018-06-22 15:20:38,670 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:20:38,670 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:20:38,670 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 15:20:38,670 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:20:38,670 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:20:38,671 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:20:38,671 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:20:38,671 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:20:38,723 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:20:38,940 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:20:38,940 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:20:38,940 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-22 15:20:38,955 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:20:38,996 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:20:39,006 INFO ]: Computing forward predicates... [2018-06-22 15:20:39,759 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:20:39,791 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:20:39,791 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 15:20:39,792 INFO ]: Interpolant automaton has 9 states [2018-06-22 15:20:39,792 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 15:20:39,792 INFO ]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-06-22 15:20:39,792 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 15:20:40,271 WARN ]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-22 15:20:40,373 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:20:40,373 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 15:20:40,373 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 15:20:40,373 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 15:20:40,374 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:20:40,374 INFO ]: With dead ends: 15 [2018-06-22 15:20:40,374 INFO ]: Without dead ends: 15 [2018-06-22 15:20:40,375 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2018-06-22 15:20:40,375 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 15:20:40,378 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 15:20:40,378 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 15:20:40,380 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 15:20:40,380 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 15:20:40,381 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:20:40,381 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 15:20:40,381 INFO ]: Interpolant automaton has 9 states. [2018-06-22 15:20:40,381 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 15:20:40,381 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 15:20:40,381 INFO ]: Found error trace [2018-06-22 15:20:40,381 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:20:40,381 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:20:40,381 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 15:20:40,382 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:20:40,382 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:20:40,382 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:20:40,382 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:20:40,382 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:20:40,435 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:20:40,714 WARN ]: Spent 168.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 9 [2018-06-22 15:20:40,983 WARN ]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 15:20:41,172 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:20:41,172 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:20:41,172 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 15:20:41,180 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:20:41,223 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:20:41,223 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:20:41,226 INFO ]: Computing forward predicates... [2018-06-22 15:20:41,863 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:20:41,882 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:20:41,882 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2018-06-22 15:20:41,882 INFO ]: Interpolant automaton has 10 states [2018-06-22 15:20:41,883 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 15:20:41,883 INFO ]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-06-22 15:20:41,883 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 10 states. [2018-06-22 15:20:42,244 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:20:42,244 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 15:20:42,244 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 15:20:42,244 INFO ]: Start accepts. Automaton has 10 states. Word has length 17 [2018-06-22 15:20:42,244 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:20:42,244 INFO ]: With dead ends: 17 [2018-06-22 15:20:42,244 INFO ]: Without dead ends: 17 [2018-06-22 15:20:42,245 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-06-22 15:20:42,245 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 15:20:42,248 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 15:20:42,248 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 15:20:42,248 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 15:20:42,248 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 15:20:42,249 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:20:42,249 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 15:20:42,249 INFO ]: Interpolant automaton has 10 states. [2018-06-22 15:20:42,249 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 15:20:42,249 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 15:20:42,249 INFO ]: Found error trace [2018-06-22 15:20:42,249 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:20:42,250 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:20:42,250 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 15:20:42,250 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:20:42,250 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:20:42,251 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:20:42,251 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:20:42,251 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:20:42,285 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:20:42,622 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:20:42,622 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:20:42,622 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) [2018-06-22 15:20:42,637 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:20:42,670 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 15:20:42,670 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:20:42,674 INFO ]: Computing forward predicates... [2018-06-22 15:20:43,609 WARN ]: Spent 596.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 14 [2018-06-22 15:20:43,831 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:20:43,852 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:20:43,852 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2018-06-22 15:20:43,853 INFO ]: Interpolant automaton has 12 states [2018-06-22 15:20:43,853 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 15:20:43,853 INFO ]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-06-22 15:20:43,853 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 12 states. [2018-06-22 15:20:43,983 WARN ]: Spent 115.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2018-06-22 15:20:44,242 WARN ]: Spent 128.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2018-06-22 15:20:44,369 WARN ]: Spent 108.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2018-06-22 15:20:44,382 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:20:44,382 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 15:20:44,383 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 15:20:44,383 INFO ]: Start accepts. Automaton has 12 states. Word has length 21 [2018-06-22 15:20:44,383 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:20:44,384 INFO ]: With dead ends: 19 [2018-06-22 15:20:44,384 INFO ]: Without dead ends: 19 [2018-06-22 15:20:44,384 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2018-06-22 15:20:44,384 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 15:20:44,387 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 15:20:44,387 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 15:20:44,388 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 15:20:44,388 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 15:20:44,388 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:20:44,388 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 15:20:44,388 INFO ]: Interpolant automaton has 12 states. [2018-06-22 15:20:44,388 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 15:20:44,389 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 15:20:44,389 INFO ]: Found error trace [2018-06-22 15:20:44,389 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:20:44,389 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:20:44,389 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-22 15:20:44,389 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:20:44,389 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:20:44,390 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:20:44,390 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:20:44,390 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:20:44,428 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:20:44,871 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:20:44,871 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:20:44,871 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 15:20:44,877 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 15:20:44,925 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 15:20:44,925 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:20:44,930 INFO ]: Computing forward predicates... [2018-06-22 15:20:45,401 WARN ]: Spent 312.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 25 [2018-06-22 15:20:45,560 WARN ]: Spent 130.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2018-06-22 15:20:46,052 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:20:46,072 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:20:46,072 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2018-06-22 15:20:46,072 INFO ]: Interpolant automaton has 16 states [2018-06-22 15:20:46,072 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 15:20:46,072 INFO ]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2018-06-22 15:20:46,072 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 16 states. [2018-06-22 15:20:46,369 WARN ]: Spent 267.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2018-06-22 15:20:46,495 WARN ]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 19 [2018-06-22 15:20:46,700 WARN ]: Spent 190.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 25 [2018-06-22 15:20:46,951 WARN ]: Spent 234.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 31 [2018-06-22 15:20:47,189 WARN ]: Spent 222.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 27 [2018-06-22 15:20:47,214 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:20:47,214 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 15:20:47,217 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 15:20:47,217 INFO ]: Start accepts. Automaton has 16 states. Word has length 25 [2018-06-22 15:20:47,217 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:20:47,218 INFO ]: With dead ends: 21 [2018-06-22 15:20:47,218 INFO ]: Without dead ends: 21 [2018-06-22 15:20:47,218 INFO ]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2018-06-22 15:20:47,218 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 15:20:47,221 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 15:20:47,221 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 15:20:47,222 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 15:20:47,222 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 15:20:47,222 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:20:47,222 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 15:20:47,222 INFO ]: Interpolant automaton has 16 states. [2018-06-22 15:20:47,222 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 15:20:47,223 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 15:20:47,223 INFO ]: Found error trace [2018-06-22 15:20:47,223 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:20:47,223 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:20:47,223 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 5 times [2018-06-22 15:20:47,224 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:20:47,224 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:20:47,224 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:20:47,224 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:20:47,224 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:20:47,296 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:20:47,863 WARN ]: Spent 340.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2018-06-22 15:20:48,261 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:20:48,261 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:20:48,261 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 15:20:48,267 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 15:20:48,319 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 15:20:48,319 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:20:48,324 INFO ]: Computing forward predicates... [2018-06-22 15:20:50,944 WARN ]: Spent 2.29 s on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2018-06-22 15:20:53,507 WARN ]: Spent 2.24 s on a formula simplification. DAG size of input: 44 DAG size of output: 29 [2018-06-22 15:20:53,864 WARN ]: Spent 326.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2018-06-22 15:20:54,423 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:20:54,442 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:20:54,443 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2018-06-22 15:20:54,443 INFO ]: Interpolant automaton has 20 states [2018-06-22 15:20:54,443 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-22 15:20:54,443 INFO ]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2018-06-22 15:20:54,443 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 20 states. [2018-06-22 15:20:54,990 WARN ]: Spent 493.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2018-06-22 15:20:55,178 WARN ]: Spent 154.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 21 [2018-06-22 15:20:55,402 WARN ]: Spent 202.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 33 [2018-06-22 15:20:55,809 WARN ]: Spent 355.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2018-06-22 15:20:56,064 WARN ]: Spent 230.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 32 [2018-06-22 15:20:56,540 WARN ]: Spent 450.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2018-06-22 15:20:56,573 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:20:56,574 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 15:20:56,574 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 15:20:56,574 INFO ]: Start accepts. Automaton has 20 states. Word has length 29 [2018-06-22 15:20:56,574 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:20:56,575 INFO ]: With dead ends: 23 [2018-06-22 15:20:56,575 INFO ]: Without dead ends: 23 [2018-06-22 15:20:56,575 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2018-06-22 15:20:56,575 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 15:20:56,579 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 15:20:56,579 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 15:20:56,580 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 15:20:56,580 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 15:20:56,580 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:20:56,580 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 15:20:56,580 INFO ]: Interpolant automaton has 20 states. [2018-06-22 15:20:56,580 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 15:20:56,581 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 15:20:56,584 INFO ]: Found error trace [2018-06-22 15:20:56,584 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:20:56,584 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:20:56,584 INFO ]: Analyzing trace with hash -1661294575, now seen corresponding path program 6 times [2018-06-22 15:20:56,584 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:20:56,584 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:20:56,585 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:20:56,585 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:20:56,585 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:20:56,662 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:20:56,922 WARN ]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 15:20:57,664 WARN ]: Spent 682.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-06-22 15:20:58,353 WARN ]: Spent 619.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2018-06-22 15:20:58,834 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:20:58,834 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:20:58,834 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 15:20:58,841 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 15:20:58,961 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-22 15:20:58,961 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:20:58,966 INFO ]: Computing forward predicates... [2018-06-22 15:20:59,733 WARN ]: Spent 486.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 35 [2018-06-22 15:20:59,914 WARN ]: Spent 147.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2018-06-22 15:21:00,126 WARN ]: Spent 178.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 29 [2018-06-22 15:21:00,349 WARN ]: Spent 178.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2018-06-22 15:21:00,713 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:21:00,753 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:21:00,753 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2018-06-22 15:21:00,754 INFO ]: Interpolant automaton has 23 states [2018-06-22 15:21:00,754 INFO ]: Constructing interpolant automaton starting with 23 interpolants. [2018-06-22 15:21:00,754 INFO ]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2018-06-22 15:21:00,754 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 23 states. [2018-06-22 15:21:01,322 WARN ]: Spent 429.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 56 [2018-06-22 15:21:01,614 WARN ]: Spent 254.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 39 [2018-06-22 15:21:01,996 WARN ]: Spent 356.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 40 [2018-06-22 15:21:02,354 WARN ]: Spent 328.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 48 [2018-06-22 15:21:02,744 WARN ]: Spent 358.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 43 [2018-06-22 15:21:03,077 WARN ]: Spent 307.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 43 [2018-06-22 15:21:03,483 WARN ]: Spent 376.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2018-06-22 15:21:03,510 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:21:03,510 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 15:21:03,514 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 15:21:03,514 INFO ]: Start accepts. Automaton has 23 states. Word has length 33 [2018-06-22 15:21:03,514 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:21:03,515 INFO ]: With dead ends: 25 [2018-06-22 15:21:03,515 INFO ]: Without dead ends: 25 [2018-06-22 15:21:03,516 INFO ]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2018-06-22 15:21:03,516 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 15:21:03,521 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 15:21:03,521 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 15:21:03,522 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 15:21:03,522 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 33 [2018-06-22 15:21:03,522 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:21:03,522 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 15:21:03,522 INFO ]: Interpolant automaton has 23 states. [2018-06-22 15:21:03,522 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 15:21:03,523 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 15:21:03,523 INFO ]: Found error trace [2018-06-22 15:21:03,523 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:21:03,523 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:21:03,523 INFO ]: Analyzing trace with hash -1494134477, now seen corresponding path program 7 times [2018-06-22 15:21:03,523 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:21:03,523 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:21:03,524 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:21:03,524 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:21:03,524 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:21:03,604 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:21:04,082 WARN ]: Spent 154.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2018-06-22 15:21:04,292 WARN ]: Spent 202.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2018-06-22 15:21:04,487 WARN ]: Spent 179.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 34 [2018-06-22 15:21:05,181 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:21:05,181 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:21:05,181 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 15:21:05,191 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:21:05,256 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:21:05,262 INFO ]: Computing forward predicates... [2018-06-22 15:21:05,755 WARN ]: Spent 331.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 39 [2018-06-22 15:21:08,289 WARN ]: Spent 2.24 s on a formula simplification. DAG size of input: 167 DAG size of output: 91 [2018-06-22 15:21:08,492 WARN ]: Spent 160.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2018-06-22 15:21:08,743 WARN ]: Spent 208.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2018-06-22 15:21:08,933 WARN ]: Spent 149.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2018-06-22 15:21:18,208 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:21:18,227 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:21:18,227 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2018-06-22 15:21:18,228 INFO ]: Interpolant automaton has 32 states [2018-06-22 15:21:18,228 INFO ]: Constructing interpolant automaton starting with 32 interpolants. [2018-06-22 15:21:18,228 INFO ]: CoverageRelationStatistics Valid=97, Invalid=895, Unknown=0, NotChecked=0, Total=992 [2018-06-22 15:21:18,229 INFO ]: Start difference. First operand 25 states and 26 transitions. Second operand 32 states. [2018-06-22 15:21:20,293 WARN ]: Spent 1.95 s on a formula simplification. DAG size of input: 192 DAG size of output: 116 [2018-06-22 15:21:20,744 WARN ]: Spent 383.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 44 [2018-06-22 15:21:21,687 WARN ]: Spent 838.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 67 [2018-06-22 15:21:22,683 WARN ]: Spent 945.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 65 [2018-06-22 15:21:23,521 WARN ]: Spent 788.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 69 [2018-06-22 15:21:24,347 WARN ]: Spent 777.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 84 [2018-06-22 15:21:25,270 WARN ]: Spent 870.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 72 [2018-06-22 15:21:27,035 WARN ]: Spent 1.70 s on a formula simplification. DAG size of input: 193 DAG size of output: 119 [2018-06-22 15:21:27,097 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:21:27,097 INFO ]: Finished difference Result 27 states and 28 transitions. [2018-06-22 15:21:27,099 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 15:21:27,099 INFO ]: Start accepts. Automaton has 32 states. Word has length 37 [2018-06-22 15:21:27,100 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:21:27,100 INFO ]: With dead ends: 27 [2018-06-22 15:21:27,100 INFO ]: Without dead ends: 27 [2018-06-22 15:21:27,101 INFO ]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=257, Invalid=1303, Unknown=0, NotChecked=0, Total=1560 [2018-06-22 15:21:27,101 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-22 15:21:27,107 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-06-22 15:21:27,107 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-22 15:21:27,107 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-06-22 15:21:27,108 INFO ]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 37 [2018-06-22 15:21:27,108 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:21:27,108 INFO ]: Abstraction has 27 states and 28 transitions. [2018-06-22 15:21:27,108 INFO ]: Interpolant automaton has 32 states. [2018-06-22 15:21:27,108 INFO ]: Start isEmpty. Operand 27 states and 28 transitions. [2018-06-22 15:21:27,109 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 15:21:27,109 INFO ]: Found error trace [2018-06-22 15:21:27,109 INFO ]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:21:27,109 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:21:27,109 INFO ]: Analyzing trace with hash 1618126293, now seen corresponding path program 8 times [2018-06-22 15:21:27,109 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:21:27,109 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:21:27,112 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:21:27,112 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:21:27,113 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:21:27,221 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:21:27,896 WARN ]: Spent 404.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2018-06-22 15:21:28,070 WARN ]: Spent 167.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2018-06-22 15:21:28,180 WARN ]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-06-22 15:21:28,386 WARN ]: Spent 106.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2018-06-22 15:21:29,003 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 15:21:29,004 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:21:29,004 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 15:21:29,009 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:21:29,065 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:21:29,065 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:21:29,072 INFO ]: Computing forward predicates... [2018-06-22 15:21:29,626 WARN ]: Spent 425.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 45 [2018-06-22 15:21:30,405 WARN ]: Spent 712.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 68 [2018-06-22 15:21:31,003 WARN ]: Spent 526.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 40 [2018-06-22 15:21:31,226 WARN ]: Spent 177.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2018-06-22 15:21:31,492 WARN ]: Spent 219.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2018-06-22 15:21:31,977 WARN ]: Spent 421.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 35 Received shutdown request... [2018-06-22 15:21:36,608 INFO ]: Timeout while computing interpolants [2018-06-22 15:21:36,809 WARN ]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:21:36,809 WARN ]: Verification canceled [2018-06-22 15:21:36,812 WARN ]: Timeout [2018-06-22 15:21:36,812 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 03:21:36 BoogieIcfgContainer [2018-06-22 15:21:36,812 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 15:21:36,813 INFO ]: Toolchain (without parser) took 58938.86 ms. Allocated memory was 309.3 MB in the beginning and 1.2 GB in the end (delta: 927.5 MB). Free memory was 261.7 MB in the beginning and 376.5 MB in the end (delta: -114.7 MB). Peak memory consumption was 812.8 MB. Max. memory is 3.6 GB. [2018-06-22 15:21:36,813 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 309.3 MB. Free memory is still 274.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 15:21:36,813 INFO ]: ChcToBoogie took 42.14 ms. Allocated memory is still 309.3 MB. Free memory was 261.7 MB in the beginning and 259.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:21:36,814 INFO ]: Boogie Preprocessor took 46.38 ms. Allocated memory is still 309.3 MB. Free memory was 259.7 MB in the beginning and 257.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:21:36,814 INFO ]: RCFGBuilder took 255.70 ms. Allocated memory is still 309.3 MB. Free memory was 257.8 MB in the beginning and 248.8 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:21:36,814 INFO ]: TraceAbstraction took 58586.53 ms. Allocated memory was 309.3 MB in the beginning and 1.2 GB in the end (delta: 927.5 MB). Free memory was 248.8 MB in the beginning and 376.5 MB in the end (delta: -127.7 MB). Peak memory consumption was 799.8 MB. Max. memory is 3.6 GB. [2018-06-22 15:21:36,817 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 309.3 MB. Free memory is still 274.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 42.14 ms. Allocated memory is still 309.3 MB. Free memory was 261.7 MB in the beginning and 259.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 46.38 ms. Allocated memory is still 309.3 MB. Free memory was 259.7 MB in the beginning and 257.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 255.70 ms. Allocated memory is still 309.3 MB. Free memory was 257.8 MB in the beginning and 248.8 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 58586.53 ms. Allocated memory was 309.3 MB in the beginning and 1.2 GB in the end (delta: 927.5 MB). Free memory was 248.8 MB in the beginning and 376.5 MB in the end (delta: -127.7 MB). Peak memory consumption was 799.8 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 42 with TraceHistMax 9, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 6 quantified variables from 5 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 58.5s OverallTime, 9 OverallIterations, 9 TraceHistogramMax, 16.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 104 SDtfs, 290 SDslu, 597 SDs, 0 SdLazy, 514 SolverSat, 361 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 293 GetRequests, 132 SyntacticMatches, 14 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 34.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 31.0s InterpolantComputationTime, 359 NumberOfCodeBlocks, 359 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 344 ConstructedInterpolants, 0 QuantifiedInterpolants, 42042732 SizeOfPredicates, 397 NumberOfNonLiveVariables, 1477 ConjunctsInSsa, 304 ConjunctsInUnsatCore, 15 InterpolantComputations, 1 PerfectInterpolantSequences, 168/616 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/nest-if4.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_15-21-36-827.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nest-if4.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_15-21-36-827.csv Completed graceful shutdown