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/bound.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:52:19,515 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:52:19,518 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:52:19,531 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:52:19,531 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:52:19,532 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:52:19,536 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:52:19,538 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:52:19,540 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:52:19,540 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:52:19,542 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:52:19,543 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:52:19,543 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:52:19,545 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:52:19,545 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:52:19,548 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:52:19,550 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:52:19,563 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:52:19,564 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:52:19,565 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:52:19,566 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:52:19,568 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:52:19,569 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:52:19,569 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:52:19,570 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:52:19,574 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:52:19,575 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:52:19,575 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:52:19,576 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:52:19,577 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:52:19,577 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:52:19,578 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:52:19,578 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:52:19,579 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:52:19,580 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:52:19,580 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 14:52:19,594 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:52:19,595 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:52:19,595 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:52:19,595 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:52:19,598 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:52:19,598 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:52:19,598 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:52:19,598 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:52:19,598 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:52:19,599 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:52:19,599 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:52:19,599 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:52:19,599 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:52:19,599 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:52:19,600 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:52:19,600 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:52:19,600 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:52:19,600 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:52:19,600 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:52:19,605 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:52:19,605 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:52:19,646 INFO ]: Repository-Root is: /tmp [2018-06-22 14:52:19,664 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:52:19,670 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:52:19,671 INFO ]: Initializing SmtParser... [2018-06-22 14:52:19,671 INFO ]: SmtParser initialized [2018-06-22 14:52:19,673 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/bound.c.smt2 [2018-06-22 14:52:19,674 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-22 14:52:19,769 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/bound.c.smt2 unknown [2018-06-22 14:52:20,078 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/bound.c.smt2 [2018-06-22 14:52:20,083 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:52:20,089 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:52:20,090 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:52:20,090 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:52:20,091 INFO ]: ChcToBoogie initialized [2018-06-22 14:52:20,094 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:52:20" (1/1) ... [2018-06-22 14:52:20,143 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:52:20 Unit [2018-06-22 14:52:20,143 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:52:20,144 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:52:20,144 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:52:20,144 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:52:20,171 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:52:20" (1/1) ... [2018-06-22 14:52:20,172 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:52:20" (1/1) ... [2018-06-22 14:52:20,180 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:52:20" (1/1) ... [2018-06-22 14:52:20,180 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:52:20" (1/1) ... [2018-06-22 14:52:20,187 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:52:20" (1/1) ... [2018-06-22 14:52:20,188 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:52:20" (1/1) ... [2018-06-22 14:52:20,190 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:52:20" (1/1) ... [2018-06-22 14:52:20,192 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:52:20,192 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:52:20,192 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:52:20,192 INFO ]: RCFGBuilder initialized [2018-06-22 14:52:20,193 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:52:20" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-22 14:52:20,224 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:52:20,224 INFO ]: Found specification of procedure False [2018-06-22 14:52:20,224 INFO ]: Found implementation of procedure False [2018-06-22 14:52:20,224 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:52:20,224 INFO ]: Found specification of procedure state [2018-06-22 14:52:20,224 INFO ]: Found implementation of procedure state [2018-06-22 14:52:20,224 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:52:20,224 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:52:20,224 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:52:20,440 INFO ]: Using library mode [2018-06-22 14:52:20,440 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:52:20 BoogieIcfgContainer [2018-06-22 14:52:20,440 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:52:20,441 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:52:20,441 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:52:20,444 INFO ]: TraceAbstraction initialized [2018-06-22 14:52:20,445 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:52:20" (1/3) ... [2018-06-22 14:52:20,446 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24bb2bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:52:20, skipping insertion in model container [2018-06-22 14:52:20,446 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:52:20" (2/3) ... [2018-06-22 14:52:20,446 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24bb2bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:52:20, skipping insertion in model container [2018-06-22 14:52:20,446 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:52:20" (3/3) ... [2018-06-22 14:52:20,448 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:52:20,456 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:52:20,463 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:52:20,504 INFO ]: Using default assertion order modulation [2018-06-22 14:52:20,505 INFO ]: Interprodecural is true [2018-06-22 14:52:20,505 INFO ]: Hoare is false [2018-06-22 14:52:20,505 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:52:20,505 INFO ]: Backedges is TWOTRACK [2018-06-22 14:52:20,505 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:52:20,505 INFO ]: Difference is false [2018-06-22 14:52:20,505 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:52:20,505 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:52:20,521 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:52:20,539 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:52:20,539 INFO ]: Found error trace [2018-06-22 14:52:20,540 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:52:20,540 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:52:20,544 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 14:52:20,545 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:52:20,546 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:52:20,583 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:52:20,583 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:52:20,583 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:52:20,612 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:52:20,752 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:52:20,755 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:52:20,755 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:52:20,757 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:52:20,773 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:52:20,774 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:52:20,776 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:52:20,878 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:52:20,878 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:52:20,879 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:52:20,880 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:52:20,881 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:52:20,889 INFO ]: With dead ends: 13 [2018-06-22 14:52:20,889 INFO ]: Without dead ends: 13 [2018-06-22 14:52:20,891 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:52:20,905 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:52:20,928 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:52:20,929 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:52:20,930 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:52:20,931 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:52:20,931 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:52:20,931 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:52:20,931 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:52:20,931 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:52:20,933 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:52:20,933 INFO ]: Found error trace [2018-06-22 14:52:20,933 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:52:20,933 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:52:20,933 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 14:52:20,933 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:52:20,933 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:52:20,935 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:52:20,935 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:52:20,935 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:52:20,998 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:52:21,248 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:52:21,248 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:52:21,248 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:52:21,260 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:52:21,310 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:52:21,320 INFO ]: Computing forward predicates... [2018-06-22 14:52:21,562 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:52:21,596 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:52:21,596 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-06-22 14:52:21,597 INFO ]: Interpolant automaton has 6 states [2018-06-22 14:52:21,597 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 14:52:21,597 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 14:52:21,597 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 6 states. [2018-06-22 14:52:21,781 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:52:21,781 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 14:52:21,782 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 14:52:21,782 INFO ]: Start accepts. Automaton has 6 states. Word has length 13 [2018-06-22 14:52:21,783 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:52:21,783 INFO ]: With dead ends: 15 [2018-06-22 14:52:21,783 INFO ]: Without dead ends: 15 [2018-06-22 14:52:21,784 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 14:52:21,784 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 14:52:21,786 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 14:52:21,786 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 14:52:21,790 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 14:52:21,790 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 14:52:21,790 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:52:21,790 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 14:52:21,790 INFO ]: Interpolant automaton has 6 states. [2018-06-22 14:52:21,790 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 14:52:21,791 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 14:52:21,791 INFO ]: Found error trace [2018-06-22 14:52:21,791 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:52:21,791 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:52:21,791 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 14:52:21,791 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:52:21,791 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:52:21,792 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:52:21,792 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:52:21,792 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:52:21,886 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:52:22,204 WARN ]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-06-22 14:52:22,521 WARN ]: Spent 307.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2018-06-22 14:52:22,639 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:52:22,639 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:52:22,639 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 14:52:22,652 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 14:52:22,708 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:52:22,708 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:52:22,711 INFO ]: Computing forward predicates... [2018-06-22 14:52:23,664 WARN ]: Spent 701.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 8 [2018-06-22 14:52:23,765 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:52:23,786 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:52:23,786 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-06-22 14:52:23,787 INFO ]: Interpolant automaton has 11 states [2018-06-22 14:52:23,787 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-22 14:52:23,787 INFO ]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-06-22 14:52:23,787 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-06-22 14:52:24,120 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:52:24,120 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 14:52:24,121 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:52:24,121 INFO ]: Start accepts. Automaton has 11 states. Word has length 17 [2018-06-22 14:52:24,121 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:52:24,122 INFO ]: With dead ends: 17 [2018-06-22 14:52:24,122 INFO ]: Without dead ends: 17 [2018-06-22 14:52:24,122 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2018-06-22 14:52:24,122 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 14:52:24,125 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 14:52:24,125 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 14:52:24,127 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 14:52:24,127 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 14:52:24,127 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:52:24,127 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 14:52:24,127 INFO ]: Interpolant automaton has 11 states. [2018-06-22 14:52:24,127 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 14:52:24,127 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 14:52:24,128 INFO ]: Found error trace [2018-06-22 14:52:24,128 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:52:24,128 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:52:24,128 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 14:52:24,128 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:52:24,128 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:52:24,129 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:52:24,129 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:52:24,129 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:52:24,172 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:52:24,516 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:52:24,517 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:52:24,517 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:52:24,524 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 14:52:24,559 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 14:52:24,559 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:52:24,562 INFO ]: Computing forward predicates... [2018-06-22 14:52:25,025 WARN ]: Spent 334.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 21 [2018-06-22 14:52:25,324 WARN ]: Spent 116.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 22 [2018-06-22 14:52:25,632 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:52:25,664 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:52:25,664 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2018-06-22 14:52:25,664 INFO ]: Interpolant automaton has 15 states [2018-06-22 14:52:25,664 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-22 14:52:25,664 INFO ]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2018-06-22 14:52:25,664 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 15 states. [2018-06-22 14:52:26,006 WARN ]: Spent 316.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2018-06-22 14:52:26,245 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:52:26,245 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 14:52:26,246 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 14:52:26,246 INFO ]: Start accepts. Automaton has 15 states. Word has length 21 [2018-06-22 14:52:26,246 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:52:26,247 INFO ]: With dead ends: 19 [2018-06-22 14:52:26,247 INFO ]: Without dead ends: 19 [2018-06-22 14:52:26,247 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2018-06-22 14:52:26,247 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 14:52:26,249 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 14:52:26,249 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 14:52:26,250 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 14:52:26,250 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 14:52:26,250 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:52:26,250 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 14:52:26,250 INFO ]: Interpolant automaton has 15 states. [2018-06-22 14:52:26,250 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 14:52:26,251 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 14:52:26,251 INFO ]: Found error trace [2018-06-22 14:52:26,251 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:52:26,251 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:52:26,251 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-22 14:52:26,251 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:52:26,251 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:52:26,252 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:52:26,252 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:52:26,252 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:52:26,296 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:52:26,832 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 14:52:26,832 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:52:26,832 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:52:26,840 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 14:52:26,915 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 14:52:26,915 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:52:26,920 INFO ]: Computing forward predicates... [2018-06-22 14:52:27,457 WARN ]: Spent 120.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 22 [2018-06-22 14:52:27,701 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 14:52:27,720 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:52:27,720 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2018-06-22 14:52:27,720 INFO ]: Interpolant automaton has 17 states [2018-06-22 14:52:27,720 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 14:52:27,720 INFO ]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2018-06-22 14:52:27,720 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 17 states. [2018-06-22 14:52:27,927 WARN ]: Spent 188.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2018-06-22 14:52:28,445 WARN ]: Spent 193.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2018-06-22 14:52:28,467 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:52:28,467 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 14:52:28,470 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 14:52:28,470 INFO ]: Start accepts. Automaton has 17 states. Word has length 25 [2018-06-22 14:52:28,470 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:52:28,471 INFO ]: With dead ends: 21 [2018-06-22 14:52:28,471 INFO ]: Without dead ends: 21 [2018-06-22 14:52:28,471 INFO ]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2018-06-22 14:52:28,471 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 14:52:28,477 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 14:52:28,477 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 14:52:28,477 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 14:52:28,478 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 14:52:28,478 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:52:28,478 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 14:52:28,478 INFO ]: Interpolant automaton has 17 states. [2018-06-22 14:52:28,478 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 14:52:28,478 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 14:52:28,478 INFO ]: Found error trace [2018-06-22 14:52:28,479 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:52:28,479 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:52:28,479 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 5 times [2018-06-22 14:52:28,479 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:52:28,479 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:52:28,480 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:52:28,481 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:52:28,481 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:52:28,554 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:52:29,279 WARN ]: Spent 489.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-06-22 14:52:29,594 WARN ]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-06-22 14:52:29,920 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 14:52:29,920 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:52:29,920 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:52:29,926 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 14:52:29,979 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 14:52:29,979 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:52:29,984 INFO ]: Computing forward predicates... [2018-06-22 14:52:30,391 WARN ]: Spent 258.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 24 [2018-06-22 14:52:30,536 WARN ]: Spent 120.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 23 [2018-06-22 14:52:30,675 WARN ]: Spent 114.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 22 [2018-06-22 14:52:32,184 WARN ]: Spent 170.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 2 [2018-06-22 14:52:32,217 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 14:52:32,247 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:52:32,247 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2018-06-22 14:52:32,247 INFO ]: Interpolant automaton has 18 states [2018-06-22 14:52:32,247 INFO ]: Constructing interpolant automaton starting with 18 interpolants. [2018-06-22 14:52:32,247 INFO ]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2018-06-22 14:52:32,247 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 18 states. [2018-06-22 14:52:33,877 WARN ]: Spent 1.35 s on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2018-06-22 14:52:34,059 WARN ]: Spent 150.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 18 [2018-06-22 14:52:34,427 WARN ]: Spent 349.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 27 [2018-06-22 14:52:34,793 WARN ]: Spent 345.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 28 [2018-06-22 14:52:34,925 WARN ]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 27 [2018-06-22 14:52:35,245 WARN ]: Spent 291.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2018-06-22 14:52:35,269 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:52:35,269 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 14:52:35,270 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 14:52:35,270 INFO ]: Start accepts. Automaton has 18 states. Word has length 29 [2018-06-22 14:52:35,270 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:52:35,271 INFO ]: With dead ends: 23 [2018-06-22 14:52:35,271 INFO ]: Without dead ends: 23 [2018-06-22 14:52:35,271 INFO ]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2018-06-22 14:52:35,271 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 14:52:35,275 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 14:52:35,275 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 14:52:35,276 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 14:52:35,276 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 14:52:35,276 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:52:35,276 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 14:52:35,276 INFO ]: Interpolant automaton has 18 states. [2018-06-22 14:52:35,276 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 14:52:35,277 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 14:52:35,277 INFO ]: Found error trace [2018-06-22 14:52:35,277 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:52:35,277 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:52:35,277 INFO ]: Analyzing trace with hash 800064122, now seen corresponding path program 6 times [2018-06-22 14:52:35,277 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:52:35,277 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:52:35,278 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:52:35,278 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:52:35,278 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:52:35,380 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:52:36,034 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 14:52:36,034 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:52:36,034 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:52:36,042 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 14:52:36,153 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-22 14:52:36,154 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:52:36,160 INFO ]: Computing forward predicates... [2018-06-22 14:53:19,134 WARN ]: Spent 38.47 s on a formula simplification. DAG size of input: 4132 DAG size of output: 101 [2018-06-22 14:53:19,430 WARN ]: Spent 116.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 22 [2018-06-22 14:53:19,894 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 14:53:19,923 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:53:19,923 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2018-06-22 14:53:19,923 INFO ]: Interpolant automaton has 22 states [2018-06-22 14:53:19,923 INFO ]: Constructing interpolant automaton starting with 22 interpolants. [2018-06-22 14:53:19,924 INFO ]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2018-06-22 14:53:19,924 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 22 states. [2018-06-22 14:53:20,752 WARN ]: Spent 680.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 73 [2018-06-22 14:53:21,162 WARN ]: Spent 345.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 19 [2018-06-22 14:53:21,659 WARN ]: Spent 392.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 28 [2018-06-22 14:53:22,035 WARN ]: Spent 343.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 30 [2018-06-22 14:53:22,382 WARN ]: Spent 317.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 28 [2018-06-22 14:53:22,980 WARN ]: Spent 566.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 53 [2018-06-22 14:53:23,828 WARN ]: Spent 810.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 71 [2018-06-22 14:53:24,542 WARN ]: Spent 674.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 74 [2018-06-22 14:53:24,570 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:53:24,570 INFO ]: Finished difference Result 27 states and 28 transitions. [2018-06-22 14:53:24,570 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 14:53:24,570 INFO ]: Start accepts. Automaton has 22 states. Word has length 33 [2018-06-22 14:53:24,571 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:53:24,571 INFO ]: With dead ends: 27 [2018-06-22 14:53:24,571 INFO ]: Without dead ends: 27 [2018-06-22 14:53:24,572 INFO ]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 45.2s TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2018-06-22 14:53:24,572 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-22 14:53:24,576 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-06-22 14:53:24,576 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-22 14:53:24,577 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-06-22 14:53:24,577 INFO ]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 33 [2018-06-22 14:53:24,577 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:53:24,577 INFO ]: Abstraction has 27 states and 28 transitions. [2018-06-22 14:53:24,577 INFO ]: Interpolant automaton has 22 states. [2018-06-22 14:53:24,578 INFO ]: Start isEmpty. Operand 27 states and 28 transitions. [2018-06-22 14:53:24,578 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 14:53:24,578 INFO ]: Found error trace [2018-06-22 14:53:24,578 INFO ]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:53:24,579 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:53:24,579 INFO ]: Analyzing trace with hash -544278078, now seen corresponding path program 7 times [2018-06-22 14:53:24,579 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:53:24,579 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:53:24,580 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:53:24,580 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:53:24,580 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:53:24,674 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:53:25,632 WARN ]: Spent 652.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-06-22 14:53:25,805 WARN ]: Spent 123.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2018-06-22 14:53:26,119 WARN ]: Spent 131.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 Received shutdown request... [2018-06-22 14:53:26,475 WARN ]: Verification canceled [2018-06-22 14:53:26,478 WARN ]: Timeout [2018-06-22 14:53:26,479 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 02:53:26 BoogieIcfgContainer [2018-06-22 14:53:26,479 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 14:53:26,479 INFO ]: Toolchain (without parser) took 66395.94 ms. Allocated memory was 306.2 MB in the beginning and 1.0 GB in the end (delta: 734.0 MB). Free memory was 257.7 MB in the beginning and 245.9 MB in the end (delta: 11.9 MB). Peak memory consumption was 745.9 MB. Max. memory is 3.6 GB. [2018-06-22 14:53:26,480 INFO ]: SmtParser took 0.09 ms. Allocated memory is still 306.2 MB. Free memory is still 271.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 14:53:26,480 INFO ]: ChcToBoogie took 53.40 ms. Allocated memory is still 306.2 MB. Free memory was 256.7 MB in the beginning and 254.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 14:53:26,482 INFO ]: Boogie Preprocessor took 47.83 ms. Allocated memory is still 306.2 MB. Free memory was 254.7 MB in the beginning and 253.7 MB in the end (delta: 996.3 kB). Peak memory consumption was 996.3 kB. Max. memory is 3.6 GB. [2018-06-22 14:53:26,482 INFO ]: RCFGBuilder took 248.12 ms. Allocated memory is still 306.2 MB. Free memory was 253.7 MB in the beginning and 242.7 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 3.6 GB. [2018-06-22 14:53:26,483 INFO ]: TraceAbstraction took 66037.40 ms. Allocated memory was 306.2 MB in the beginning and 1.0 GB in the end (delta: 734.0 MB). Free memory was 242.7 MB in the beginning and 245.9 MB in the end (delta: -3.2 MB). Peak memory consumption was 730.8 MB. Max. memory is 3.6 GB. [2018-06-22 14:53:26,485 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.09 ms. Allocated memory is still 306.2 MB. Free memory is still 271.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 53.40 ms. Allocated memory is still 306.2 MB. Free memory was 256.7 MB in the beginning and 254.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 47.83 ms. Allocated memory is still 306.2 MB. Free memory was 254.7 MB in the beginning and 253.7 MB in the end (delta: 996.3 kB). Peak memory consumption was 996.3 kB. Max. memory is 3.6 GB. * RCFGBuilder took 248.12 ms. Allocated memory is still 306.2 MB. Free memory was 253.7 MB in the beginning and 242.7 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 3.6 GB. * TraceAbstraction took 66037.40 ms. Allocated memory was 306.2 MB in the beginning and 1.0 GB in the end (delta: 734.0 MB). Free memory was 242.7 MB in the beginning and 245.9 MB in the end (delta: -3.2 MB). Peak memory consumption was 730.8 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 42 with TraceHistMax 9, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 18 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 65.9s OverallTime, 8 OverallIterations, 9 TraceHistogramMax, 9.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 86 SDtfs, 183 SDslu, 376 SDs, 0 SdLazy, 324 SolverSat, 228 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 228 GetRequests, 114 SyntacticMatches, 9 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 55.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred 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: 0.0s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 53.1s InterpolantComputationTime, 285 NumberOfCodeBlocks, 285 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 272 ConstructedInterpolants, 0 QuantifiedInterpolants, 1268684808 SizeOfPredicates, 388 NumberOfNonLiveVariables, 1305 ConjunctsInSsa, 223 ConjunctsInUnsatCore, 13 InterpolantComputations, 1 PerfectInterpolantSequences, 112/406 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/bound.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_14-53-26-502.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/bound.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_14-53-26-502.csv Completed graceful shutdown