java -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/chccomp2018/chcToBoogie_automizer.epf -i /storage/chc-comp/vmt-chc-benchmarks/ctigar/xyz2.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 13:50:49,539 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 13:50:49,541 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 13:50:49,553 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 13:50:49,554 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 13:50:49,555 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 13:50:49,556 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 13:50:49,558 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 13:50:49,560 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 13:50:49,561 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 13:50:49,562 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 13:50:49,562 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 13:50:49,563 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 13:50:49,564 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 13:50:49,564 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 13:50:49,565 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 13:50:49,573 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 13:50:49,575 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 13:50:49,577 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 13:50:49,578 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 13:50:49,580 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 13:50:49,582 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 13:50:49,583 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 13:50:49,583 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 13:50:49,584 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 13:50:49,585 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 13:50:49,586 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 13:50:49,587 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 13:50:49,588 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 13:50:49,589 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 13:50:49,589 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 13:50:49,590 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 13:50:49,591 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 13:50:49,592 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 13:50:49,592 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 13:50:49,593 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 13:50:49,606 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 13:50:49,607 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 13:50:49,607 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 13:50:49,607 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 13:50:49,609 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 13:50:49,609 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 13:50:49,609 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 13:50:49,610 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 13:50:49,610 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 13:50:49,610 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 13:50:49,610 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 13:50:49,611 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 13:50:49,611 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 13:50:49,611 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 13:50:49,611 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 13:50:49,612 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 13:50:49,612 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 13:50:49,614 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 13:50:49,614 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 13:50:49,662 INFO ]: Repository-Root is: /tmp [2018-06-18 13:50:49,681 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 13:50:49,686 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 13:50:49,687 INFO ]: Initializing SmtParser... [2018-06-18 13:50:49,688 INFO ]: SmtParser initialized [2018-06-18 13:50:49,688 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/xyz2.c.smt2 [2018-06-18 13:50:49,690 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 [2018-06-18 13:50:49,782 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/xyz2.c.smt2 unknown [2018-06-18 13:50:50,226 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/xyz2.c.smt2 [2018-06-18 13:50:50,232 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 13:50:50,239 INFO ]: Walking toolchain with 4 elements. [2018-06-18 13:50:50,240 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 13:50:50,240 INFO ]: Initializing ChcToBoogie... [2018-06-18 13:50:50,240 INFO ]: ChcToBoogie initialized [2018-06-18 13:50:50,247 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 01:50:50" (1/1) ... [2018-06-18 13:50:50,328 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:50:50 Unit [2018-06-18 13:50:50,328 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 13:50:50,329 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 13:50:50,329 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 13:50:50,329 INFO ]: Boogie Preprocessor initialized [2018-06-18 13:50:50,363 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:50:50" (1/1) ... [2018-06-18 13:50:50,364 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:50:50" (1/1) ... [2018-06-18 13:50:50,376 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:50:50" (1/1) ... [2018-06-18 13:50:50,376 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:50:50" (1/1) ... [2018-06-18 13:50:50,388 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:50:50" (1/1) ... [2018-06-18 13:50:50,389 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:50:50" (1/1) ... [2018-06-18 13:50:50,390 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:50:50" (1/1) ... [2018-06-18 13:50:50,392 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 13:50:50,393 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 13:50:50,393 INFO ]: Initializing RCFGBuilder... [2018-06-18 13:50:50,393 INFO ]: RCFGBuilder initialized [2018-06-18 13:50:50,394 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:50:50" (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) [2018-06-18 13:50:50,422 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 13:50:50,422 INFO ]: Found specification of procedure False [2018-06-18 13:50:50,422 INFO ]: Found implementation of procedure False [2018-06-18 13:50:50,422 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-18 13:50:50,422 INFO ]: Found specification of procedure state [2018-06-18 13:50:50,422 INFO ]: Found implementation of procedure state [2018-06-18 13:50:50,422 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 13:50:50,422 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 13:50:50,422 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 [2018-06-18 13:50:50,748 INFO ]: Using library mode [2018-06-18 13:50:50,752 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 01:50:50 BoogieIcfgContainer [2018-06-18 13:50:50,752 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 13:50:50,754 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 13:50:50,754 INFO ]: Initializing TraceAbstraction... [2018-06-18 13:50:50,764 INFO ]: TraceAbstraction initialized [2018-06-18 13:50:50,764 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 01:50:50" (1/3) ... [2018-06-18 13:50:50,765 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43525564 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 01:50:50, skipping insertion in model container [2018-06-18 13:50:50,765 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:50:50" (2/3) ... [2018-06-18 13:50:50,765 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43525564 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 01:50:50, skipping insertion in model container [2018-06-18 13:50:50,766 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 01:50:50" (3/3) ... [2018-06-18 13:50:50,768 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 13:50:50,779 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 13:50:50,788 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 13:50:50,837 INFO ]: Using default assertion order modulation [2018-06-18 13:50:50,837 INFO ]: Interprodecural is true [2018-06-18 13:50:50,837 INFO ]: Hoare is false [2018-06-18 13:50:50,837 INFO ]: Compute interpolants for FPandBP [2018-06-18 13:50:50,837 INFO ]: Backedges is TWOTRACK [2018-06-18 13:50:50,837 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 13:50:50,838 INFO ]: Difference is false [2018-06-18 13:50:50,838 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 13:50:50,838 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 13:50:50,874 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 13:50:50,893 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 13:50:50,894 INFO ]: Found error trace [2018-06-18 13:50:50,895 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:50:50,901 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:50:50,906 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-18 13:50:50,909 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:50:50,909 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:50:50,965 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:50:50,965 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:50:50,965 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:50:51,014 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:50:51,025 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:50:51,186 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 13:50:51,189 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 13:50:51,189 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 13:50:51,191 INFO ]: Interpolant automaton has 4 states [2018-06-18 13:50:51,208 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 13:50:51,208 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 13:50:51,211 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 13:50:51,310 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:50:51,310 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 13:50:51,311 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 13:50:51,312 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 13:50:51,313 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:50:51,327 INFO ]: With dead ends: 13 [2018-06-18 13:50:51,327 INFO ]: Without dead ends: 13 [2018-06-18 13:50:51,330 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 13:50:51,345 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 13:50:51,378 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 13:50:51,382 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 13:50:51,383 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 13:50:51,385 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 13:50:51,393 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:50:51,393 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 13:50:51,393 INFO ]: Interpolant automaton has 4 states. [2018-06-18 13:50:51,393 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 13:50:51,394 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 13:50:51,394 INFO ]: Found error trace [2018-06-18 13:50:51,394 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:50:51,395 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:50:51,395 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-18 13:50:51,395 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:50:51,395 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:50:51,399 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:50:51,399 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:50:51,399 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:50:51,523 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:50:51,530 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:50:51,891 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 13:50:51,892 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:50:51,892 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 [2018-06-18 13:50:51,901 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:50:51,960 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:50:51,974 INFO ]: Computing forward predicates... [2018-06-18 13:50:52,338 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 13:50:52,361 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:50:52,361 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-18 13:50:52,362 INFO ]: Interpolant automaton has 9 states [2018-06-18 13:50:52,362 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-18 13:50:52,362 INFO ]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-06-18 13:50:52,362 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-18 13:50:52,681 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:50:52,681 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 13:50:52,681 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 13:50:52,682 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-18 13:50:52,682 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:50:52,682 INFO ]: With dead ends: 15 [2018-06-18 13:50:52,682 INFO ]: Without dead ends: 15 [2018-06-18 13:50:52,683 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-06-18 13:50:52,683 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 13:50:52,686 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 13:50:52,686 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 13:50:52,687 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 13:50:52,687 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 13:50:52,687 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:50:52,687 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 13:50:52,687 INFO ]: Interpolant automaton has 9 states. [2018-06-18 13:50:52,687 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 13:50:52,688 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 13:50:52,688 INFO ]: Found error trace [2018-06-18 13:50:52,688 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:50:52,688 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:50:52,688 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-18 13:50:52,688 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:50:52,688 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:50:52,690 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:50:52,690 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:50:52,690 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:50:52,754 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:50:52,756 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:50:53,097 WARN ]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-06-18 13:50:53,327 WARN ]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-18 13:50:53,367 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 13:50:53,367 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:50:53,367 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 [2018-06-18 13:50:53,373 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 13:50:53,442 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 13:50:53,442 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:50:53,446 INFO ]: Computing forward predicates... [2018-06-18 13:50:54,227 WARN ]: Spent 381.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 9 [2018-06-18 13:50:54,577 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 13:50:54,613 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:50:54,613 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-06-18 13:50:54,613 INFO ]: Interpolant automaton has 11 states [2018-06-18 13:50:54,613 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-18 13:50:54,613 INFO ]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-06-18 13:50:54,613 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-06-18 13:50:55,170 WARN ]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-06-18 13:50:56,176 WARN ]: Spent 560.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 18 [2018-06-18 13:50:56,364 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:50:56,364 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-18 13:50:56,365 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-18 13:50:56,366 INFO ]: Start accepts. Automaton has 11 states. Word has length 17 [2018-06-18 13:50:56,366 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:50:56,366 INFO ]: With dead ends: 17 [2018-06-18 13:50:56,366 INFO ]: Without dead ends: 17 [2018-06-18 13:50:56,369 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2018-06-18 13:50:56,369 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-18 13:50:56,373 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-18 13:50:56,374 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-18 13:50:56,374 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-18 13:50:56,374 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-18 13:50:56,374 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:50:56,374 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-18 13:50:56,375 INFO ]: Interpolant automaton has 11 states. [2018-06-18 13:50:56,375 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-18 13:50:56,375 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-18 13:50:56,375 INFO ]: Found error trace [2018-06-18 13:50:56,375 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:50:56,375 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:50:56,376 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-18 13:50:56,376 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:50:56,376 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:50:56,376 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:50:56,377 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 13:50:56,377 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:50:56,492 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:50:56,493 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:50:56,890 WARN ]: Spent 219.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 15 [2018-06-18 13:50:57,208 WARN ]: Spent 276.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 14 [2018-06-18 13:50:57,456 WARN ]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-06-18 13:50:57,558 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 13:50:57,558 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:50:57,558 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 [2018-06-18 13:50:57,568 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-18 13:50:57,622 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-18 13:50:57,623 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:50:57,626 INFO ]: Computing forward predicates... [2018-06-18 13:50:58,267 WARN ]: Spent 497.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 27 [2018-06-18 13:50:58,528 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 13:50:58,565 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:50:58,565 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2018-06-18 13:50:58,566 INFO ]: Interpolant automaton has 13 states [2018-06-18 13:50:58,566 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-18 13:50:58,566 INFO ]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2018-06-18 13:50:58,566 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 13 states. [2018-06-18 13:50:59,257 WARN ]: Spent 663.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2018-06-18 13:50:59,443 WARN ]: Spent 154.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 22 [2018-06-18 13:50:59,744 WARN ]: Spent 285.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2018-06-18 13:50:59,952 WARN ]: Spent 181.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2018-06-18 13:50:59,981 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:50:59,981 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-18 13:50:59,986 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-18 13:50:59,986 INFO ]: Start accepts. Automaton has 13 states. Word has length 21 [2018-06-18 13:50:59,986 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:50:59,987 INFO ]: With dead ends: 19 [2018-06-18 13:50:59,987 INFO ]: Without dead ends: 19 [2018-06-18 13:50:59,987 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2018-06-18 13:50:59,988 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-18 13:50:59,990 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-18 13:50:59,990 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-18 13:50:59,991 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-18 13:50:59,991 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-18 13:50:59,991 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:50:59,991 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-18 13:50:59,991 INFO ]: Interpolant automaton has 13 states. [2018-06-18 13:50:59,992 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-18 13:50:59,992 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-18 13:50:59,992 INFO ]: Found error trace [2018-06-18 13:50:59,992 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:50:59,992 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:50:59,993 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-18 13:50:59,993 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:50:59,993 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:50:59,994 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:50:59,994 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 13:50:59,994 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:51:00,028 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:51:00,029 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:51:00,484 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-18 13:51:00,484 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:51:00,484 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 [2018-06-18 13:51:00,490 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-18 13:51:00,540 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-18 13:51:00,540 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:51:00,545 INFO ]: Computing forward predicates... [2018-06-18 13:51:02,441 WARN ]: Spent 1.70 s on a formula simplification. DAG size of input: 58 DAG size of output: 25 [2018-06-18 13:51:02,627 WARN ]: Spent 163.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2018-06-18 13:51:02,827 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-18 13:51:02,849 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:51:02,849 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2018-06-18 13:51:02,849 INFO ]: Interpolant automaton has 17 states [2018-06-18 13:51:02,849 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-18 13:51:02,850 INFO ]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2018-06-18 13:51:02,850 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 17 states. [2018-06-18 13:51:03,116 WARN ]: Spent 228.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2018-06-18 13:51:03,356 WARN ]: Spent 116.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2018-06-18 13:51:03,609 WARN ]: Spent 227.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2018-06-18 13:51:03,893 WARN ]: Spent 262.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2018-06-18 13:51:03,930 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:51:03,930 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-18 13:51:03,930 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-18 13:51:03,930 INFO ]: Start accepts. Automaton has 17 states. Word has length 25 [2018-06-18 13:51:03,930 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:51:03,931 INFO ]: With dead ends: 21 [2018-06-18 13:51:03,931 INFO ]: Without dead ends: 21 [2018-06-18 13:51:03,931 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2018-06-18 13:51:03,932 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-18 13:51:03,935 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-18 13:51:03,935 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-18 13:51:03,935 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-18 13:51:03,935 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-18 13:51:03,936 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:51:03,936 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-18 13:51:03,936 INFO ]: Interpolant automaton has 17 states. [2018-06-18 13:51:03,936 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-18 13:51:03,937 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-18 13:51:03,937 INFO ]: Found error trace [2018-06-18 13:51:03,937 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:51:03,937 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:51:03,937 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 5 times [2018-06-18 13:51:03,937 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:51:03,937 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:51:03,938 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:51:03,938 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 13:51:03,938 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:51:03,994 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:51:03,995 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:51:04,321 WARN ]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-06-18 13:51:04,646 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-18 13:51:04,646 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:51:04,646 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 [2018-06-18 13:51:04,654 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-18 13:51:04,762 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-18 13:51:04,762 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:51:04,768 INFO ]: Computing forward predicates... [2018-06-18 13:51:11,212 WARN ]: Spent 5.64 s on a formula simplification. DAG size of input: 393 DAG size of output: 76 [2018-06-18 13:51:13,317 WARN ]: Spent 1.98 s on a formula simplification. DAG size of input: 53 DAG size of output: 31 [2018-06-18 13:51:13,557 WARN ]: Spent 103.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2018-06-18 13:51:15,178 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-18 13:51:15,203 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:51:15,203 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2018-06-18 13:51:15,203 INFO ]: Interpolant automaton has 25 states [2018-06-18 13:51:15,203 INFO ]: Constructing interpolant automaton starting with 25 interpolants. [2018-06-18 13:51:15,203 INFO ]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2018-06-18 13:51:15,204 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 25 states. [2018-06-18 13:51:15,325 WARN ]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-18 13:51:19,159 WARN ]: Spent 3.49 s on a formula simplification. DAG size of input: 117 DAG size of output: 113 [2018-06-18 13:51:19,881 WARN ]: Spent 375.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 30 [2018-06-18 13:51:20,914 WARN ]: Spent 990.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 65 [2018-06-18 13:51:22,465 WARN ]: Spent 1.51 s on a formula simplification. DAG size of input: 115 DAG size of output: 47 [2018-06-18 13:51:23,189 WARN ]: Spent 650.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 58 [2018-06-18 13:51:25,396 WARN ]: Spent 2.07 s on a formula simplification. DAG size of input: 119 DAG size of output: 88 [2018-06-18 13:51:25,559 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:51:25,559 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-18 13:51:25,590 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-18 13:51:25,590 INFO ]: Start accepts. Automaton has 25 states. Word has length 29 [2018-06-18 13:51:25,591 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:51:25,591 INFO ]: With dead ends: 23 [2018-06-18 13:51:25,591 INFO ]: Without dead ends: 23 [2018-06-18 13:51:25,592 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2018-06-18 13:51:25,592 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-18 13:51:25,595 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-18 13:51:25,595 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-18 13:51:25,595 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-18 13:51:25,596 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-18 13:51:25,596 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:51:25,596 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-18 13:51:25,596 INFO ]: Interpolant automaton has 25 states. [2018-06-18 13:51:25,596 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-18 13:51:25,598 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-18 13:51:25,598 INFO ]: Found error trace [2018-06-18 13:51:25,598 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:51:25,598 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:51:25,598 INFO ]: Analyzing trace with hash 800064122, now seen corresponding path program 6 times [2018-06-18 13:51:25,598 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:51:25,598 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:51:25,599 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:51:25,599 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 13:51:25,599 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:51:25,724 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:51:25,724 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:51:26,473 WARN ]: Spent 515.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-18 13:51:26,810 WARN ]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-06-18 13:51:27,346 WARN ]: Spent 128.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 17 [2018-06-18 13:51:27,455 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-18 13:51:27,455 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:51:27,455 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 [2018-06-18 13:51:27,460 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-18 13:51:27,531 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-18 13:51:27,531 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:51:27,536 INFO ]: Computing forward predicates... [2018-06-18 13:51:27,910 WARN ]: Spent 285.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 24 [2018-06-18 13:51:28,507 WARN ]: Spent 562.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2018-06-18 13:51:29,082 WARN ]: Spent 509.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2018-06-18 13:51:29,252 WARN ]: Spent 122.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2018-06-18 13:51:29,768 WARN ]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-06-18 13:51:30,806 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-18 13:51:30,837 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:51:30,837 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2018-06-18 13:51:30,837 INFO ]: Interpolant automaton has 29 states [2018-06-18 13:51:30,837 INFO ]: Constructing interpolant automaton starting with 29 interpolants. [2018-06-18 13:51:30,837 INFO ]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2018-06-18 13:51:30,838 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 29 states. [2018-06-18 13:51:32,716 WARN ]: Spent 1.82 s on a formula simplification. DAG size of input: 103 DAG size of output: 99 [2018-06-18 13:51:33,689 WARN ]: Spent 908.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2018-06-18 13:51:34,824 WARN ]: Spent 1.09 s on a formula simplification. DAG size of input: 99 DAG size of output: 70 [2018-06-18 13:51:41,472 WARN ]: Spent 6.52 s on a formula simplification. DAG size of input: 110 DAG size of output: 45 [2018-06-18 13:51:42,664 WARN ]: Spent 1.11 s on a formula simplification. DAG size of input: 109 DAG size of output: 61 [2018-06-18 13:51:43,735 WARN ]: Spent 1.03 s on a formula simplification. DAG size of input: 101 DAG size of output: 62 [2018-06-18 13:51:44,257 WARN ]: Spent 386.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 47 [2018-06-18 13:51:44,299 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:51:44,299 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-18 13:51:44,300 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-18 13:51:44,300 INFO ]: Start accepts. Automaton has 29 states. Word has length 33 [2018-06-18 13:51:44,300 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:51:44,301 INFO ]: With dead ends: 25 [2018-06-18 13:51:44,301 INFO ]: Without dead ends: 25 [2018-06-18 13:51:44,302 INFO ]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=207, Invalid=1125, Unknown=0, NotChecked=0, Total=1332 [2018-06-18 13:51:44,302 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-18 13:51:44,305 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-18 13:51:44,305 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-18 13:51:44,308 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-18 13:51:44,308 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 33 [2018-06-18 13:51:44,309 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:51:44,309 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-18 13:51:44,309 INFO ]: Interpolant automaton has 29 states. [2018-06-18 13:51:44,309 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-18 13:51:44,309 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-18 13:51:44,309 INFO ]: Found error trace [2018-06-18 13:51:44,310 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:51:44,310 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:51:44,310 INFO ]: Analyzing trace with hash -411423458, now seen corresponding path program 7 times [2018-06-18 13:51:44,310 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:51:44,310 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:51:44,311 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:51:44,311 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 13:51:44,311 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:51:44,371 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:51:44,372 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:51:45,377 WARN ]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-06-18 13:51:45,519 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-18 13:51:45,519 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:51:45,519 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 [2018-06-18 13:51:45,527 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:51:45,605 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:51:45,612 INFO ]: Computing forward predicates... [2018-06-18 13:51:46,577 WARN ]: Spent 828.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 52 [2018-06-18 13:51:47,386 WARN ]: Spent 599.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2018-06-18 13:51:48,524 WARN ]: Spent 1.02 s on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2018-06-18 13:51:49,045 WARN ]: Spent 338.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2018-06-18 13:51:53,841 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-18 13:51:53,862 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:51:53,862 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2018-06-18 13:51:53,863 INFO ]: Interpolant automaton has 30 states [2018-06-18 13:51:53,863 INFO ]: Constructing interpolant automaton starting with 30 interpolants. [2018-06-18 13:51:53,863 INFO ]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2018-06-18 13:51:53,863 INFO ]: Start difference. First operand 25 states and 26 transitions. Second operand 30 states. [2018-06-18 13:51:55,801 WARN ]: Spent 1.88 s on a formula simplification. DAG size of input: 155 DAG size of output: 123 [2018-06-18 13:51:56,444 WARN ]: Spent 503.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 34 [2018-06-18 13:51:57,458 WARN ]: Spent 972.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 38 [2018-06-18 13:51:58,235 WARN ]: Spent 732.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 48 Received shutdown request... [2018-06-18 13:51:59,655 WARN ]: Removed 13 from assertion stack [2018-06-18 13:51:59,656 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-18 13:51:59,656 WARN ]: Verification canceled [2018-06-18 13:51:59,664 WARN ]: Timeout [2018-06-18 13:51:59,665 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.06 01:51:59 BoogieIcfgContainer [2018-06-18 13:51:59,665 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-18 13:51:59,666 INFO ]: Toolchain (without parser) took 69433.48 ms. Allocated memory was 307.8 MB in the beginning and 632.8 MB in the end (delta: 325.1 MB). Free memory was 261.1 MB in the beginning and 188.8 MB in the end (delta: 72.4 MB). Peak memory consumption was 397.4 MB. Max. memory is 3.6 GB. [2018-06-18 13:51:59,669 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 307.8 MB. Free memory is still 273.2 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 13:51:59,669 INFO ]: ChcToBoogie took 88.89 ms. Allocated memory is still 307.8 MB. Free memory was 261.1 MB in the beginning and 258.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-18 13:51:59,670 INFO ]: Boogie Preprocessor took 63.50 ms. Allocated memory is still 307.8 MB. Free memory was 258.2 MB in the beginning and 256.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-18 13:51:59,670 INFO ]: RCFGBuilder took 359.05 ms. Allocated memory is still 307.8 MB. Free memory was 256.2 MB in the beginning and 247.1 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 3.6 GB. [2018-06-18 13:51:59,671 INFO ]: TraceAbstraction took 68910.85 ms. Allocated memory was 307.8 MB in the beginning and 632.8 MB in the end (delta: 325.1 MB). Free memory was 247.1 MB in the beginning and 188.8 MB in the end (delta: 58.3 MB). Peak memory consumption was 383.3 MB. Max. memory is 3.6 GB. [2018-06-18 13:51:59,678 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 307.8 MB. Free memory is still 273.2 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 88.89 ms. Allocated memory is still 307.8 MB. Free memory was 261.1 MB in the beginning and 258.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 63.50 ms. Allocated memory is still 307.8 MB. Free memory was 258.2 MB in the beginning and 256.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 359.05 ms. Allocated memory is still 307.8 MB. Free memory was 256.2 MB in the beginning and 247.1 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 3.6 GB. * TraceAbstraction took 68910.85 ms. Allocated memory was 307.8 MB in the beginning and 632.8 MB in the end (delta: 325.1 MB). Free memory was 247.1 MB in the beginning and 188.8 MB in the end (delta: 58.3 MB). Peak memory consumption was 383.3 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was constructing difference of abstraction (25states) and interpolant automaton (currently 8 states, 30 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 161. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 68.8s OverallTime, 8 OverallIterations, 8 TraceHistogramMax, 34.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 97 SDtfs, 219 SDslu, 598 SDs, 0 SdLazy, 516 SolverSat, 293 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 294 GetRequests, 131 SyntacticMatches, 3 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 54.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 32.8s InterpolantComputationTime, 359 NumberOfCodeBlocks, 359 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 344 ConstructedInterpolants, 0 QuantifiedInterpolants, 1225320 SizeOfPredicates, 319 NumberOfNonLiveVariables, 1351 ConjunctsInSsa, 303 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/xyz2.c.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-18_13-51-59-702.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/xyz2.c.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-18_13-51-59-702.csv Completed graceful shutdown