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/pldi08.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 15:27:23,762 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 15:27:23,765 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 15:27:23,777 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 15:27:23,777 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 15:27:23,778 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 15:27:23,781 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 15:27:23,785 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 15:27:23,788 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 15:27:23,788 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 15:27:23,789 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 15:27:23,789 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 15:27:23,792 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 15:27:23,793 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 15:27:23,794 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 15:27:23,795 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 15:27:23,798 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 15:27:23,800 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 15:27:23,810 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 15:27:23,811 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 15:27:23,812 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 15:27:23,813 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 15:27:23,814 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 15:27:23,814 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 15:27:23,815 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 15:27:23,817 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 15:27:23,818 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 15:27:23,818 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 15:27:23,819 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 15:27:23,819 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 15:27:23,822 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 15:27:23,822 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 15:27:23,822 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 15:27:23,823 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 15:27:23,824 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 15:27:23,824 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 15:27:23,846 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 15:27:23,846 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 15:27:23,846 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 15:27:23,846 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 15:27:23,848 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 15:27:23,848 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 15:27:23,848 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 15:27:23,849 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 15:27:23,849 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 15:27:23,849 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 15:27:23,849 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:27:23,849 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 15:27:23,849 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 15:27:23,850 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 15:27:23,850 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 15:27:23,850 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 15:27:23,850 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 15:27:23,850 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 15:27:23,851 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 15:27:23,853 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 15:27:23,853 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 15:27:23,904 INFO ]: Repository-Root is: /tmp [2018-06-22 15:27:23,920 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 15:27:23,924 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 15:27:23,925 INFO ]: Initializing SmtParser... [2018-06-22 15:27:23,925 INFO ]: SmtParser initialized [2018-06-22 15:27:23,926 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/pldi08.c.smt2 [2018-06-22 15:27:23,928 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 15:27:23,998 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/pldi08.c.smt2 unknown [2018-06-22 15:27:24,173 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/pldi08.c.smt2 [2018-06-22 15:27:24,178 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 15:27:24,184 INFO ]: Walking toolchain with 4 elements. [2018-06-22 15:27:24,185 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 15:27:24,185 INFO ]: Initializing ChcToBoogie... [2018-06-22 15:27:24,189 INFO ]: ChcToBoogie initialized [2018-06-22 15:27:24,192 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:27:24" (1/1) ... [2018-06-22 15:27:24,237 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:27:24 Unit [2018-06-22 15:27:24,237 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 15:27:24,238 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 15:27:24,238 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 15:27:24,238 INFO ]: Boogie Preprocessor initialized [2018-06-22 15:27:24,261 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:27:24" (1/1) ... [2018-06-22 15:27:24,261 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:27:24" (1/1) ... [2018-06-22 15:27:24,268 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:27:24" (1/1) ... [2018-06-22 15:27:24,269 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:27:24" (1/1) ... [2018-06-22 15:27:24,271 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:27:24" (1/1) ... [2018-06-22 15:27:24,285 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:27:24" (1/1) ... [2018-06-22 15:27:24,286 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:27:24" (1/1) ... [2018-06-22 15:27:24,287 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 15:27:24,288 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 15:27:24,288 INFO ]: Initializing RCFGBuilder... [2018-06-22 15:27:24,288 INFO ]: RCFGBuilder initialized [2018-06-22 15:27:24,289 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:27:24" (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 15:27:24,312 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 15:27:24,312 INFO ]: Found specification of procedure False [2018-06-22 15:27:24,312 INFO ]: Found implementation of procedure False [2018-06-22 15:27:24,312 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 15:27:24,312 INFO ]: Found specification of procedure state [2018-06-22 15:27:24,312 INFO ]: Found implementation of procedure state [2018-06-22 15:27:24,312 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 15:27:24,312 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 15:27:24,312 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 15:27:24,580 INFO ]: Using library mode [2018-06-22 15:27:24,580 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:27:24 BoogieIcfgContainer [2018-06-22 15:27:24,580 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 15:27:24,582 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 15:27:24,582 INFO ]: Initializing TraceAbstraction... [2018-06-22 15:27:24,594 INFO ]: TraceAbstraction initialized [2018-06-22 15:27:24,594 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:27:24" (1/3) ... [2018-06-22 15:27:24,595 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fb505f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 03:27:24, skipping insertion in model container [2018-06-22 15:27:24,595 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:27:24" (2/3) ... [2018-06-22 15:27:24,595 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fb505f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 03:27:24, skipping insertion in model container [2018-06-22 15:27:24,595 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:27:24" (3/3) ... [2018-06-22 15:27:24,597 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 15:27:24,613 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 15:27:24,621 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 15:27:24,706 INFO ]: Using default assertion order modulation [2018-06-22 15:27:24,707 INFO ]: Interprodecural is true [2018-06-22 15:27:24,707 INFO ]: Hoare is false [2018-06-22 15:27:24,707 INFO ]: Compute interpolants for FPandBP [2018-06-22 15:27:24,707 INFO ]: Backedges is TWOTRACK [2018-06-22 15:27:24,707 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 15:27:24,707 INFO ]: Difference is false [2018-06-22 15:27:24,707 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 15:27:24,707 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 15:27:24,724 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 15:27:24,737 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 15:27:24,737 INFO ]: Found error trace [2018-06-22 15:27:24,738 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:27:24,738 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:27:24,741 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 15:27:24,743 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:27:24,743 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:27:24,774 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:27:24,774 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:27:24,774 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:27:24,800 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:27:24,887 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 15:27:24,897 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 15:27:24,898 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 15:27:24,899 INFO ]: Interpolant automaton has 4 states [2018-06-22 15:27:24,918 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 15:27:24,919 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:27:24,921 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 15:27:25,008 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:27:25,009 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 15:27:25,009 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 15:27:25,010 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 15:27:25,011 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:27:25,020 INFO ]: With dead ends: 13 [2018-06-22 15:27:25,020 INFO ]: Without dead ends: 13 [2018-06-22 15:27:25,022 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 15:27:25,036 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 15:27:25,055 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 15:27:25,056 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 15:27:25,057 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 15:27:25,058 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 15:27:25,058 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:27:25,058 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 15:27:25,058 INFO ]: Interpolant automaton has 4 states. [2018-06-22 15:27:25,058 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 15:27:25,060 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 15:27:25,060 INFO ]: Found error trace [2018-06-22 15:27:25,060 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:27:25,060 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:27:25,060 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 15:27:25,060 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:27:25,060 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:27:25,061 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:27:25,061 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:27:25,061 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:27:25,094 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:27:25,284 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:27:25,284 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:27:25,284 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:27:25,292 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:27:25,326 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:27:25,335 INFO ]: Computing forward predicates... [2018-06-22 15:27:25,608 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:27:25,641 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:27:25,641 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-06-22 15:27:25,642 INFO ]: Interpolant automaton has 6 states [2018-06-22 15:27:25,642 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 15:27:25,642 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 15:27:25,642 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 6 states. [2018-06-22 15:27:25,750 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:27:25,751 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 15:27:25,751 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 15:27:25,751 INFO ]: Start accepts. Automaton has 6 states. Word has length 13 [2018-06-22 15:27:25,752 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:27:25,752 INFO ]: With dead ends: 15 [2018-06-22 15:27:25,752 INFO ]: Without dead ends: 15 [2018-06-22 15:27:25,753 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 15:27:25,753 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 15:27:25,757 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 15:27:25,757 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 15:27:25,757 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 15:27:25,758 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 15:27:25,758 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:27:25,758 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 15:27:25,758 INFO ]: Interpolant automaton has 6 states. [2018-06-22 15:27:25,758 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 15:27:25,758 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 15:27:25,758 INFO ]: Found error trace [2018-06-22 15:27:25,758 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:27:25,759 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:27:25,759 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 15:27:25,759 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:27:25,759 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:27:25,761 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:27:25,761 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:27:25,761 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:27:25,815 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:27:26,227 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:27:26,227 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:27:26,227 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 15:27:26,236 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:27:26,280 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:27:26,280 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:27:26,283 INFO ]: Computing forward predicates... [2018-06-22 15:27:26,631 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:27:26,650 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:27:26,650 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-06-22 15:27:26,650 INFO ]: Interpolant automaton has 11 states [2018-06-22 15:27:26,650 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-22 15:27:26,651 INFO ]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2018-06-22 15:27:26,651 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-06-22 15:27:26,903 WARN ]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-06-22 15:27:27,228 WARN ]: Spent 113.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2018-06-22 15:27:27,245 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:27:27,245 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 15:27:27,246 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 15:27:27,246 INFO ]: Start accepts. Automaton has 11 states. Word has length 17 [2018-06-22 15:27:27,246 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:27:27,247 INFO ]: With dead ends: 17 [2018-06-22 15:27:27,247 INFO ]: Without dead ends: 17 [2018-06-22 15:27:27,247 INFO ]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2018-06-22 15:27:27,247 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 15:27:27,252 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 15:27:27,252 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 15:27:27,253 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 15:27:27,253 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 15:27:27,253 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:27:27,253 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 15:27:27,253 INFO ]: Interpolant automaton has 11 states. [2018-06-22 15:27:27,253 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 15:27:27,254 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 15:27:27,254 INFO ]: Found error trace [2018-06-22 15:27:27,254 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:27:27,254 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:27:27,254 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 15:27:27,254 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:27:27,254 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:27:27,255 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:27:27,255 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:27:27,255 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:27:27,282 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:27:27,491 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:27:27,492 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:27:27,492 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:27:27,501 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 15:27:27,527 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 15:27:27,527 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:27:27,530 INFO ]: Computing forward predicates... [2018-06-22 15:27:27,866 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:27:27,893 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:27:27,893 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-22 15:27:27,894 INFO ]: Interpolant automaton has 17 states [2018-06-22 15:27:27,894 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 15:27:27,894 INFO ]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2018-06-22 15:27:27,894 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-22 15:27:28,243 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:27:28,243 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 15:27:28,244 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 15:27:28,245 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-22 15:27:28,245 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:27:28,245 INFO ]: With dead ends: 19 [2018-06-22 15:27:28,245 INFO ]: Without dead ends: 19 [2018-06-22 15:27:28,246 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2018-06-22 15:27:28,246 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 15:27:28,249 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 15:27:28,249 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 15:27:28,250 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 15:27:28,250 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 15:27:28,250 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:27:28,250 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 15:27:28,250 INFO ]: Interpolant automaton has 17 states. [2018-06-22 15:27:28,250 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 15:27:28,251 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 15:27:28,251 INFO ]: Found error trace [2018-06-22 15:27:28,251 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:27:28,251 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:27:28,251 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-22 15:27:28,251 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:27:28,251 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:27:28,252 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:27:28,252 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:27:28,252 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:27:28,273 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:27:28,444 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:27:28,444 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:27:28,444 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 15:27:28,450 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 15:27:28,470 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 15:27:28,470 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:27:28,473 INFO ]: Computing forward predicates... [2018-06-22 15:27:28,865 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:27:28,884 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:27:28,884 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2018-06-22 15:27:28,884 INFO ]: Interpolant automaton has 17 states [2018-06-22 15:27:28,885 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 15:27:28,885 INFO ]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2018-06-22 15:27:28,885 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 17 states. [2018-06-22 15:27:29,304 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:27:29,304 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 15:27:29,306 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 15:27:29,306 INFO ]: Start accepts. Automaton has 17 states. Word has length 25 [2018-06-22 15:27:29,306 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:27:29,307 INFO ]: With dead ends: 21 [2018-06-22 15:27:29,307 INFO ]: Without dead ends: 21 [2018-06-22 15:27:29,307 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2018-06-22 15:27:29,307 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 15:27:29,310 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 15:27:29,310 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 15:27:29,311 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 15:27:29,311 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 15:27:29,311 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:27:29,311 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 15:27:29,311 INFO ]: Interpolant automaton has 17 states. [2018-06-22 15:27:29,311 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 15:27:29,312 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 15:27:29,312 INFO ]: Found error trace [2018-06-22 15:27:29,312 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:27:29,312 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:27:29,312 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 5 times [2018-06-22 15:27:29,312 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:27:29,312 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:27:29,313 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:27:29,313 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:27:29,313 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:27:29,333 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:27:29,567 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:27:29,567 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:27:29,567 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 15:27:29,575 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 15:27:29,648 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 15:27:29,648 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:27:29,651 INFO ]: Computing forward predicates... [2018-06-22 15:27:29,813 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:27:29,832 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:27:29,832 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2018-06-22 15:27:29,832 INFO ]: Interpolant automaton has 16 states [2018-06-22 15:27:29,832 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 15:27:29,832 INFO ]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2018-06-22 15:27:29,832 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 16 states. [2018-06-22 15:27:30,030 WARN ]: Spent 154.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2018-06-22 15:27:30,439 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:27:30,439 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 15:27:30,442 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 15:27:30,442 INFO ]: Start accepts. Automaton has 16 states. Word has length 29 [2018-06-22 15:27:30,442 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:27:30,443 INFO ]: With dead ends: 23 [2018-06-22 15:27:30,443 INFO ]: Without dead ends: 23 [2018-06-22 15:27:30,443 INFO ]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2018-06-22 15:27:30,443 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 15:27:30,446 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 15:27:30,446 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 15:27:30,448 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 15:27:30,448 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 15:27:30,449 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:27:30,449 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 15:27:30,449 INFO ]: Interpolant automaton has 16 states. [2018-06-22 15:27:30,449 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 15:27:30,449 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 15:27:30,449 INFO ]: Found error trace [2018-06-22 15:27:30,450 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:27:30,450 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:27:30,450 INFO ]: Analyzing trace with hash 800064122, now seen corresponding path program 6 times [2018-06-22 15:27:30,450 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:27:30,450 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:27:30,450 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:27:30,450 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:27:30,450 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:27:30,472 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:27:30,735 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:27:30,735 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:27:30,735 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 15:27:30,741 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 15:27:30,781 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-22 15:27:30,781 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:27:30,785 INFO ]: Computing forward predicates... [2018-06-22 15:27:30,929 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:27:30,959 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:27:30,959 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 21 [2018-06-22 15:27:30,959 INFO ]: Interpolant automaton has 21 states [2018-06-22 15:27:30,959 INFO ]: Constructing interpolant automaton starting with 21 interpolants. [2018-06-22 15:27:30,960 INFO ]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2018-06-22 15:27:30,960 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 21 states. [2018-06-22 15:27:31,122 WARN ]: Spent 148.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2018-06-22 15:27:31,709 WARN ]: Spent 119.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2018-06-22 15:27:31,738 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:27:31,738 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 15:27:31,738 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 15:27:31,738 INFO ]: Start accepts. Automaton has 21 states. Word has length 33 [2018-06-22 15:27:31,739 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:27:31,739 INFO ]: With dead ends: 25 [2018-06-22 15:27:31,739 INFO ]: Without dead ends: 25 [2018-06-22 15:27:31,740 INFO ]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2018-06-22 15:27:31,740 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 15:27:31,742 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 15:27:31,742 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 15:27:31,743 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 15:27:31,743 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 33 [2018-06-22 15:27:31,743 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:27:31,743 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 15:27:31,743 INFO ]: Interpolant automaton has 21 states. [2018-06-22 15:27:31,743 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 15:27:31,744 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 15:27:31,744 INFO ]: Found error trace [2018-06-22 15:27:31,744 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:27:31,744 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:27:31,744 INFO ]: Analyzing trace with hash -411423458, now seen corresponding path program 7 times [2018-06-22 15:27:31,744 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:27:31,744 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:27:31,745 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:27:31,745 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:27:31,745 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:27:31,774 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:27:32,195 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:27:32,195 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:27:32,195 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 15:27:32,203 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:27:32,235 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:27:32,240 INFO ]: Computing forward predicates... [2018-06-22 15:27:32,506 WARN ]: Spent 134.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2018-06-22 15:27:33,639 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:27:33,671 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:27:33,671 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2018-06-22 15:27:33,672 INFO ]: Interpolant automaton has 29 states [2018-06-22 15:27:33,672 INFO ]: Constructing interpolant automaton starting with 29 interpolants. [2018-06-22 15:27:33,672 INFO ]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2018-06-22 15:27:33,673 INFO ]: Start difference. First operand 25 states and 26 transitions. Second operand 29 states. [2018-06-22 15:27:34,535 WARN ]: Spent 307.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2018-06-22 15:27:34,874 WARN ]: Spent 137.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 32 [2018-06-22 15:27:35,022 WARN ]: Spent 125.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 30 [2018-06-22 15:27:35,641 WARN ]: Spent 291.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2018-06-22 15:27:35,821 WARN ]: Spent 149.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2018-06-22 15:27:35,878 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:27:35,878 INFO ]: Finished difference Result 27 states and 28 transitions. [2018-06-22 15:27:35,878 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 15:27:35,878 INFO ]: Start accepts. Automaton has 29 states. Word has length 37 [2018-06-22 15:27:35,879 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:27:35,879 INFO ]: With dead ends: 27 [2018-06-22 15:27:35,879 INFO ]: Without dead ends: 27 [2018-06-22 15:27:35,880 INFO ]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=253, Invalid=1153, Unknown=0, NotChecked=0, Total=1406 [2018-06-22 15:27:35,880 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-22 15:27:35,884 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-06-22 15:27:35,884 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-22 15:27:35,885 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-06-22 15:27:35,885 INFO ]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 37 [2018-06-22 15:27:35,885 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:27:35,885 INFO ]: Abstraction has 27 states and 28 transitions. [2018-06-22 15:27:35,885 INFO ]: Interpolant automaton has 29 states. [2018-06-22 15:27:35,885 INFO ]: Start isEmpty. Operand 27 states and 28 transitions. [2018-06-22 15:27:35,888 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 15:27:35,888 INFO ]: Found error trace [2018-06-22 15:27:35,888 INFO ]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:27:35,888 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:27:35,888 INFO ]: Analyzing trace with hash -544278078, now seen corresponding path program 8 times [2018-06-22 15:27:35,888 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:27:35,888 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:27:35,889 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:27:35,889 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:27:35,889 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:27:35,921 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:27:36,477 WARN ]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-06-22 15:27:36,756 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 15:27:36,756 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:27:36,756 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 15:27:36,769 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:27:36,807 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:27:36,807 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:27:36,812 INFO ]: Computing forward predicates... [2018-06-22 15:27:37,808 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 15:27:37,827 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:27:37,827 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 32 [2018-06-22 15:27:37,827 INFO ]: Interpolant automaton has 32 states [2018-06-22 15:27:37,828 INFO ]: Constructing interpolant automaton starting with 32 interpolants. [2018-06-22 15:27:37,828 INFO ]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2018-06-22 15:27:37,828 INFO ]: Start difference. First operand 27 states and 28 transitions. Second operand 32 states. [2018-06-22 15:27:38,258 WARN ]: Spent 362.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2018-06-22 15:27:38,546 WARN ]: Spent 105.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 30 [2018-06-22 15:27:38,697 WARN ]: Spent 121.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 34 [2018-06-22 15:27:39,073 WARN ]: Spent 133.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 36 [2018-06-22 15:27:39,257 WARN ]: Spent 149.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 40 [2018-06-22 15:27:39,476 WARN ]: Spent 133.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 38 [2018-06-22 15:27:39,689 WARN ]: Spent 151.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 36 [2018-06-22 15:27:39,722 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:27:39,722 INFO ]: Finished difference Result 29 states and 30 transitions. [2018-06-22 15:27:39,723 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 15:27:39,723 INFO ]: Start accepts. Automaton has 32 states. Word has length 41 [2018-06-22 15:27:39,723 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:27:39,723 INFO ]: With dead ends: 29 [2018-06-22 15:27:39,723 INFO ]: Without dead ends: 29 [2018-06-22 15:27:39,724 INFO ]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=285, Invalid=1437, Unknown=0, NotChecked=0, Total=1722 [2018-06-22 15:27:39,724 INFO ]: Start minimizeSevpa. Operand 29 states. [2018-06-22 15:27:39,728 INFO ]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-06-22 15:27:39,728 INFO ]: Start removeUnreachable. Operand 29 states. [2018-06-22 15:27:39,729 INFO ]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-06-22 15:27:39,729 INFO ]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 41 [2018-06-22 15:27:39,729 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:27:39,729 INFO ]: Abstraction has 29 states and 30 transitions. [2018-06-22 15:27:39,729 INFO ]: Interpolant automaton has 32 states. [2018-06-22 15:27:39,729 INFO ]: Start isEmpty. Operand 29 states and 30 transitions. [2018-06-22 15:27:39,730 INFO ]: Finished isEmpty. Found accepting run of length 46 [2018-06-22 15:27:39,730 INFO ]: Found error trace [2018-06-22 15:27:39,730 INFO ]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:27:39,730 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:27:39,730 INFO ]: Analyzing trace with hash 1442343014, now seen corresponding path program 9 times [2018-06-22 15:27:39,730 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:27:39,730 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:27:39,731 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:27:39,731 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:27:39,731 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:27:39,769 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:27:40,410 WARN ]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-22 15:27:41,491 WARN ]: Spent 1.00 s on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2018-06-22 15:27:41,919 INFO ]: Checked inductivity of 171 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 15:27:41,919 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:27:41,919 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:27:41,925 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 15:27:41,966 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-06-22 15:27:41,966 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:27:41,975 INFO ]: Computing forward predicates... [2018-06-22 15:27:42,854 WARN ]: Spent 601.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 19 [2018-06-22 15:27:43,367 WARN ]: Spent 472.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2018-06-22 15:27:45,738 WARN ]: Spent 2.18 s on a formula simplification. DAG size of input: 213 DAG size of output: 80 [2018-06-22 15:27:47,397 INFO ]: Checked inductivity of 171 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 15:27:47,417 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:27:47,417 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 32 [2018-06-22 15:27:47,418 INFO ]: Interpolant automaton has 32 states [2018-06-22 15:27:47,418 INFO ]: Constructing interpolant automaton starting with 32 interpolants. [2018-06-22 15:27:47,418 INFO ]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2018-06-22 15:27:47,418 INFO ]: Start difference. First operand 29 states and 30 transitions. Second operand 32 states. [2018-06-22 15:27:48,389 WARN ]: Spent 903.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 103 [2018-06-22 15:27:48,776 WARN ]: Spent 319.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 30 [2018-06-22 15:27:49,514 WARN ]: Spent 705.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 28 [2018-06-22 15:27:50,054 WARN ]: Spent 444.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 43 [2018-06-22 15:27:50,644 WARN ]: Spent 556.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 52 [2018-06-22 15:27:51,030 WARN ]: Spent 307.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 35 [2018-06-22 15:27:52,096 WARN ]: Spent 988.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 42 [2018-06-22 15:27:53,062 WARN ]: Spent 910.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 68 [2018-06-22 15:27:54,085 WARN ]: Spent 960.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 55 [2018-06-22 15:27:55,403 WARN ]: Spent 1.15 s on a formula simplification. DAG size of input: 134 DAG size of output: 103 [2018-06-22 15:27:55,444 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:27:55,444 INFO ]: Finished difference Result 31 states and 32 transitions. [2018-06-22 15:27:55,444 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-06-22 15:27:55,444 INFO ]: Start accepts. Automaton has 32 states. Word has length 45 [2018-06-22 15:27:55,444 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:27:55,445 INFO ]: With dead ends: 31 [2018-06-22 15:27:55,445 INFO ]: Without dead ends: 31 [2018-06-22 15:27:55,445 INFO ]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=348, Invalid=1374, Unknown=0, NotChecked=0, Total=1722 [2018-06-22 15:27:55,445 INFO ]: Start minimizeSevpa. Operand 31 states. [2018-06-22 15:27:55,449 INFO ]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-06-22 15:27:55,449 INFO ]: Start removeUnreachable. Operand 31 states. [2018-06-22 15:27:55,450 INFO ]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-06-22 15:27:55,450 INFO ]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 45 [2018-06-22 15:27:55,450 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:27:55,450 INFO ]: Abstraction has 31 states and 32 transitions. [2018-06-22 15:27:55,450 INFO ]: Interpolant automaton has 32 states. [2018-06-22 15:27:55,450 INFO ]: Start isEmpty. Operand 31 states and 32 transitions. [2018-06-22 15:27:55,451 INFO ]: Finished isEmpty. Found accepting run of length 50 [2018-06-22 15:27:55,451 INFO ]: Found error trace [2018-06-22 15:27:55,451 INFO ]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:27:55,451 INFO ]: === Iteration 11 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:27:55,451 INFO ]: Analyzing trace with hash 352352522, now seen corresponding path program 10 times [2018-06-22 15:27:55,451 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:27:55,451 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:27:55,452 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:27:55,452 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:27:55,452 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:27:55,493 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:27:56,242 INFO ]: Checked inductivity of 210 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-06-22 15:27:56,242 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:27:56,242 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:27:56,248 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 15:27:56,281 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 15:27:56,282 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:27:56,286 INFO ]: Computing forward predicates... [2018-06-22 15:27:57,175 INFO ]: Checked inductivity of 210 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-06-22 15:27:57,195 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:27:57,195 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 36 [2018-06-22 15:27:57,195 INFO ]: Interpolant automaton has 36 states [2018-06-22 15:27:57,195 INFO ]: Constructing interpolant automaton starting with 36 interpolants. [2018-06-22 15:27:57,196 INFO ]: CoverageRelationStatistics Valid=137, Invalid=1123, Unknown=0, NotChecked=0, Total=1260 [2018-06-22 15:27:57,196 INFO ]: Start difference. First operand 31 states and 32 transitions. Second operand 36 states. [2018-06-22 15:27:57,649 WARN ]: Spent 406.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2018-06-22 15:27:57,912 WARN ]: Spent 100.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 30 [2018-06-22 15:27:58,059 WARN ]: Spent 116.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 36 [2018-06-22 15:27:58,329 WARN ]: Spent 106.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2018-06-22 15:27:58,487 WARN ]: Spent 123.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 39 [2018-06-22 15:27:58,675 WARN ]: Spent 158.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 42 [2018-06-22 15:27:58,877 WARN ]: Spent 171.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 37 [2018-06-22 15:27:59,034 WARN ]: Spent 128.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 39 [2018-06-22 15:27:59,322 WARN ]: Spent 249.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 61 [2018-06-22 15:27:59,356 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:27:59,356 INFO ]: Finished difference Result 33 states and 34 transitions. [2018-06-22 15:27:59,357 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-06-22 15:27:59,357 INFO ]: Start accepts. Automaton has 36 states. Word has length 49 [2018-06-22 15:27:59,357 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:27:59,358 INFO ]: With dead ends: 33 [2018-06-22 15:27:59,358 INFO ]: Without dead ends: 33 [2018-06-22 15:27:59,358 INFO ]: 0 DeclaredPredicates, 83 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=414, Invalid=1748, Unknown=0, NotChecked=0, Total=2162 [2018-06-22 15:27:59,358 INFO ]: Start minimizeSevpa. Operand 33 states. [2018-06-22 15:27:59,362 INFO ]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-06-22 15:27:59,362 INFO ]: Start removeUnreachable. Operand 33 states. [2018-06-22 15:27:59,363 INFO ]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-06-22 15:27:59,363 INFO ]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 49 [2018-06-22 15:27:59,363 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:27:59,363 INFO ]: Abstraction has 33 states and 34 transitions. [2018-06-22 15:27:59,363 INFO ]: Interpolant automaton has 36 states. [2018-06-22 15:27:59,363 INFO ]: Start isEmpty. Operand 33 states and 34 transitions. [2018-06-22 15:27:59,364 INFO ]: Finished isEmpty. Found accepting run of length 54 [2018-06-22 15:27:59,364 INFO ]: Found error trace [2018-06-22 15:27:59,364 INFO ]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:27:59,364 INFO ]: === Iteration 12 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:27:59,364 INFO ]: Analyzing trace with hash 53554094, now seen corresponding path program 11 times [2018-06-22 15:27:59,364 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:27:59,364 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:27:59,365 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:27:59,365 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:27:59,365 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:27:59,421 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:27:59,949 WARN ]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2018-06-22 15:28:00,090 WARN ]: Spent 126.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2018-06-22 15:28:00,823 INFO ]: Checked inductivity of 253 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-06-22 15:28:00,823 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:28:00,823 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:28:00,830 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 15:28:00,880 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-06-22 15:28:00,880 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:28:00,886 INFO ]: Computing forward predicates... [2018-06-22 15:28:01,223 WARN ]: Spent 145.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2018-06-22 15:28:04,875 WARN ]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 27 [2018-06-22 15:28:05,152 WARN ]: Spent 122.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2018-06-22 15:28:05,220 INFO ]: Checked inductivity of 253 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-06-22 15:28:05,240 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:28:05,240 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 46 [2018-06-22 15:28:05,240 INFO ]: Interpolant automaton has 46 states [2018-06-22 15:28:05,240 INFO ]: Constructing interpolant automaton starting with 46 interpolants. [2018-06-22 15:28:05,241 INFO ]: CoverageRelationStatistics Valid=178, Invalid=1892, Unknown=0, NotChecked=0, Total=2070 [2018-06-22 15:28:05,241 INFO ]: Start difference. First operand 33 states and 34 transitions. Second operand 46 states. [2018-06-22 15:28:06,161 WARN ]: Spent 792.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 76 [2018-06-22 15:28:06,534 WARN ]: Spent 142.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 28 [2018-06-22 15:28:06,701 WARN ]: Spent 131.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 28 [2018-06-22 15:28:06,871 WARN ]: Spent 131.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 29 [2018-06-22 15:28:07,013 WARN ]: Spent 104.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 34 [2018-06-22 15:28:07,231 WARN ]: Spent 177.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 34 [2018-06-22 15:28:07,466 WARN ]: Spent 192.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 42 [2018-06-22 15:28:07,718 WARN ]: Spent 204.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 49 [2018-06-22 15:28:08,058 WARN ]: Spent 284.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 56 [2018-06-22 15:28:08,425 WARN ]: Spent 310.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 60 [2018-06-22 15:28:08,895 WARN ]: Spent 402.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 67 [2018-06-22 15:28:08,941 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:28:08,941 INFO ]: Finished difference Result 35 states and 36 transitions. [2018-06-22 15:28:08,941 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-06-22 15:28:08,941 INFO ]: Start accepts. Automaton has 46 states. Word has length 53 [2018-06-22 15:28:08,942 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:28:08,942 INFO ]: With dead ends: 35 [2018-06-22 15:28:08,942 INFO ]: Without dead ends: 35 [2018-06-22 15:28:08,943 INFO ]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=529, Invalid=2777, Unknown=0, NotChecked=0, Total=3306 [2018-06-22 15:28:08,943 INFO ]: Start minimizeSevpa. Operand 35 states. [2018-06-22 15:28:08,948 INFO ]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-06-22 15:28:08,948 INFO ]: Start removeUnreachable. Operand 35 states. [2018-06-22 15:28:08,949 INFO ]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-06-22 15:28:08,949 INFO ]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 53 [2018-06-22 15:28:08,949 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:28:08,949 INFO ]: Abstraction has 35 states and 36 transitions. [2018-06-22 15:28:08,949 INFO ]: Interpolant automaton has 46 states. [2018-06-22 15:28:08,949 INFO ]: Start isEmpty. Operand 35 states and 36 transitions. [2018-06-22 15:28:08,949 INFO ]: Finished isEmpty. Found accepting run of length 58 [2018-06-22 15:28:08,949 INFO ]: Found error trace [2018-06-22 15:28:08,949 INFO ]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:28:08,950 INFO ]: === Iteration 13 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:28:08,950 INFO ]: Analyzing trace with hash -1286307758, now seen corresponding path program 12 times [2018-06-22 15:28:08,950 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:28:08,950 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:28:08,950 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:28:08,950 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:28:08,950 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:28:09,011 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:28:09,889 INFO ]: Checked inductivity of 300 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-06-22 15:28:09,889 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:28:09,889 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:28:09,894 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 15:28:09,980 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-06-22 15:28:09,980 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:28:09,987 INFO ]: Computing forward predicates... [2018-06-22 15:28:10,314 WARN ]: Spent 109.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 20 [2018-06-22 15:28:10,723 WARN ]: Spent 306.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2018-06-22 15:28:15,449 INFO ]: Checked inductivity of 300 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-06-22 15:28:15,468 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:28:15,468 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 47 [2018-06-22 15:28:15,468 INFO ]: Interpolant automaton has 47 states [2018-06-22 15:28:15,469 INFO ]: Constructing interpolant automaton starting with 47 interpolants. [2018-06-22 15:28:15,469 INFO ]: CoverageRelationStatistics Valid=167, Invalid=1995, Unknown=0, NotChecked=0, Total=2162 [2018-06-22 15:28:15,469 INFO ]: Start difference. First operand 35 states and 36 transitions. Second operand 47 states. [2018-06-22 15:28:16,366 WARN ]: Spent 846.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 78 [2018-06-22 15:28:16,573 WARN ]: Spent 138.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 30 [2018-06-22 15:28:16,818 WARN ]: Spent 205.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 28 [2018-06-22 15:28:17,057 WARN ]: Spent 200.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 28 [2018-06-22 15:28:17,253 WARN ]: Spent 152.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 29 [2018-06-22 15:28:17,469 WARN ]: Spent 153.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 34 [2018-06-22 15:28:17,763 WARN ]: Spent 237.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 34 [2018-06-22 15:28:18,140 WARN ]: Spent 332.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 44 [2018-06-22 15:28:18,374 WARN ]: Spent 186.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 51 [2018-06-22 15:28:19,080 WARN ]: Spent 444.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 56 [2018-06-22 15:28:19,530 WARN ]: Spent 386.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 63 [2018-06-22 15:28:19,927 WARN ]: Spent 353.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 52 [2018-06-22 15:28:20,594 WARN ]: Spent 611.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 76 [2018-06-22 15:28:20,691 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:28:20,691 INFO ]: Finished difference Result 37 states and 38 transitions. [2018-06-22 15:28:20,691 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-06-22 15:28:20,691 INFO ]: Start accepts. Automaton has 47 states. Word has length 57 [2018-06-22 15:28:20,692 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:28:20,692 INFO ]: With dead ends: 37 [2018-06-22 15:28:20,692 INFO ]: Without dead ends: 37 [2018-06-22 15:28:20,693 INFO ]: 0 DeclaredPredicates, 97 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=566, Invalid=2974, Unknown=0, NotChecked=0, Total=3540 [2018-06-22 15:28:20,693 INFO ]: Start minimizeSevpa. Operand 37 states. [2018-06-22 15:28:20,700 INFO ]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-06-22 15:28:20,700 INFO ]: Start removeUnreachable. Operand 37 states. [2018-06-22 15:28:20,700 INFO ]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-06-22 15:28:20,700 INFO ]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 57 [2018-06-22 15:28:20,701 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:28:20,701 INFO ]: Abstraction has 37 states and 38 transitions. [2018-06-22 15:28:20,701 INFO ]: Interpolant automaton has 47 states. [2018-06-22 15:28:20,701 INFO ]: Start isEmpty. Operand 37 states and 38 transitions. [2018-06-22 15:28:20,702 INFO ]: Finished isEmpty. Found accepting run of length 62 [2018-06-22 15:28:20,702 INFO ]: Found error trace [2018-06-22 15:28:20,702 INFO ]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:28:20,702 INFO ]: === Iteration 14 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:28:20,702 INFO ]: Analyzing trace with hash -193693962, now seen corresponding path program 13 times [2018-06-22 15:28:20,702 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:28:20,702 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:28:20,703 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:28:20,703 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:28:20,703 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:28:20,761 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:28:21,087 WARN ]: Spent 137.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2018-06-22 15:28:21,964 INFO ]: Checked inductivity of 351 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2018-06-22 15:28:21,964 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:28:21,964 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:28:21,971 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:28:22,014 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:28:22,019 INFO ]: Computing forward predicates... [2018-06-22 15:28:22,539 WARN ]: Spent 410.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 28 [2018-06-22 15:28:22,717 WARN ]: Spent 142.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2018-06-22 15:28:24,023 INFO ]: Checked inductivity of 351 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2018-06-22 15:28:24,052 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:28:24,052 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 48 [2018-06-22 15:28:24,053 INFO ]: Interpolant automaton has 48 states [2018-06-22 15:28:24,053 INFO ]: Constructing interpolant automaton starting with 48 interpolants. [2018-06-22 15:28:24,053 INFO ]: CoverageRelationStatistics Valid=172, Invalid=2084, Unknown=0, NotChecked=0, Total=2256 [2018-06-22 15:28:24,053 INFO ]: Start difference. First operand 37 states and 38 transitions. Second operand 48 states. Received shutdown request... [2018-06-22 15:28:24,563 WARN ]: Removed 16 from assertion stack [2018-06-22 15:28:24,563 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 15:28:24,563 WARN ]: Verification canceled [2018-06-22 15:28:24,567 WARN ]: Timeout [2018-06-22 15:28:24,567 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 03:28:24 BoogieIcfgContainer [2018-06-22 15:28:24,567 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 15:28:24,568 INFO ]: Toolchain (without parser) took 60389.36 ms. Allocated memory was 307.2 MB in the beginning and 790.6 MB in the end (delta: 483.4 MB). Free memory was 261.6 MB in the beginning and 619.4 MB in the end (delta: -357.7 MB). Peak memory consumption was 125.7 MB. Max. memory is 3.6 GB. [2018-06-22 15:28:24,568 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 307.2 MB. Free memory is still 271.7 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 15:28:24,568 INFO ]: ChcToBoogie took 52.64 ms. Allocated memory is still 307.2 MB. Free memory was 261.6 MB in the beginning and 259.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:28:24,569 INFO ]: Boogie Preprocessor took 49.26 ms. Allocated memory is still 307.2 MB. Free memory is still 259.6 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 15:28:24,569 INFO ]: RCFGBuilder took 292.61 ms. Allocated memory is still 307.2 MB. Free memory was 259.6 MB in the beginning and 251.7 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:28:24,569 INFO ]: TraceAbstraction took 59985.02 ms. Allocated memory was 307.2 MB in the beginning and 790.6 MB in the end (delta: 483.4 MB). Free memory was 251.7 MB in the beginning and 619.4 MB in the end (delta: -367.7 MB). Peak memory consumption was 115.7 MB. Max. memory is 3.6 GB. [2018-06-22 15:28:24,571 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 307.2 MB. Free memory is still 271.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 52.64 ms. Allocated memory is still 307.2 MB. Free memory was 261.6 MB in the beginning and 259.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 49.26 ms. Allocated memory is still 307.2 MB. Free memory is still 259.6 MB. There was no memory consumed. Max. memory is 3.6 GB. * RCFGBuilder took 292.61 ms. Allocated memory is still 307.2 MB. Free memory was 259.6 MB in the beginning and 251.7 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 59985.02 ms. Allocated memory was 307.2 MB in the beginning and 790.6 MB in the end (delta: 483.4 MB). Free memory was 251.7 MB in the beginning and 619.4 MB in the end (delta: -367.7 MB). Peak memory consumption was 115.7 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 (37states) and interpolant automaton (currently 3 states, 48 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 83. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 59.8s OverallTime, 14 OverallIterations, 14 TraceHistogramMax, 26.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 188 SDtfs, 1010 SDslu, 1647 SDs, 0 SdLazy, 1438 SolverSat, 1163 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 798 GetRequests, 362 SyntacticMatches, 10 SemanticMatches, 425 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2928 ImplicationChecksByTransitivity, 43.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=13, 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, 13 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 31.3s InterpolantComputationTime, 971 NumberOfCodeBlocks, 971 NumberOfCodeBlocksAsserted, 77 NumberOfCheckSat, 944 ConstructedInterpolants, 18 QuantifiedInterpolants, 3348020 SizeOfPredicates, 676 NumberOfNonLiveVariables, 2548 ConjunctsInSsa, 706 ConjunctsInUnsatCore, 27 InterpolantComputations, 1 PerfectInterpolantSequences, 910/3458 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/pldi08.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_15-28-24-582.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/pldi08.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_15-28-24-582.csv Completed graceful shutdown