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_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if8.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 05:43:39,423 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 05:43:39,459 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 05:43:39,472 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 05:43:39,472 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 05:43:39,474 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 05:43:39,475 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 05:43:39,478 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 05:43:39,480 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 05:43:39,480 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 05:43:39,481 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 05:43:39,481 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 05:43:39,482 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 05:43:39,483 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 05:43:39,484 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 05:43:39,485 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 05:43:39,487 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 05:43:39,488 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 05:43:39,490 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 05:43:39,491 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 05:43:39,492 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 05:43:39,495 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 05:43:39,495 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 05:43:39,495 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 05:43:39,496 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 05:43:39,497 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 05:43:39,498 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 05:43:39,499 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 05:43:39,500 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 05:43:39,500 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 05:43:39,501 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 05:43:39,501 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 05:43:39,502 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 05:43:39,503 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 05:43:39,503 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 05:43:39,504 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 05:43:39,541 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 05:43:39,542 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 05:43:39,542 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 05:43:39,542 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 05:43:39,543 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 05:43:39,544 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 05:43:39,544 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 05:43:39,544 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 05:43:39,544 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:43:39,544 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 05:43:39,545 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 05:43:39,545 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 05:43:39,545 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 05:43:39,545 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 05:43:39,545 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 05:43:39,545 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 05:43:39,546 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 05:43:39,547 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 05:43:39,547 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 05:43:39,596 INFO ]: Repository-Root is: /tmp [2018-06-22 05:43:39,645 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 05:43:39,652 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 05:43:39,654 INFO ]: Initializing SmtParser... [2018-06-22 05:43:39,654 INFO ]: SmtParser initialized [2018-06-22 05:43:39,655 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if8.c.smt2 [2018-06-22 05:43:39,698 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 05:43:40,203 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if8.c.smt2 unknown [2018-06-22 05:43:40,739 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if8.c.smt2 [2018-06-22 05:43:40,744 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 05:43:40,752 INFO ]: Walking toolchain with 4 elements. [2018-06-22 05:43:40,753 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 05:43:40,753 INFO ]: Initializing ChcToBoogie... [2018-06-22 05:43:40,753 INFO ]: ChcToBoogie initialized [2018-06-22 05:43:40,973 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:43:40" (1/1) ... [2018-06-22 05:43:41,456 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:43:41 Unit [2018-06-22 05:43:41,456 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 05:43:41,457 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 05:43:41,457 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 05:43:41,457 INFO ]: Boogie Preprocessor initialized [2018-06-22 05:43:41,525 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:43:41" (1/1) ... [2018-06-22 05:43:41,525 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:43:41" (1/1) ... [2018-06-22 05:43:41,533 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:43:41" (1/1) ... [2018-06-22 05:43:41,533 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:43:41" (1/1) ... [2018-06-22 05:43:41,548 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:43:41" (1/1) ... [2018-06-22 05:43:41,550 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:43:41" (1/1) ... [2018-06-22 05:43:41,552 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:43:41" (1/1) ... [2018-06-22 05:43:41,554 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 05:43:41,554 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 05:43:41,554 INFO ]: Initializing RCFGBuilder... [2018-06-22 05:43:41,554 INFO ]: RCFGBuilder initialized [2018-06-22 05:43:41,555 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:43:41" (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) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:43:41,570 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 05:43:41,571 INFO ]: Found specification of procedure gotoProc [2018-06-22 05:43:41,571 INFO ]: Found implementation of procedure gotoProc [2018-06-22 05:43:41,571 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 05:43:41,571 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 05:43:41,571 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 05:43:42,411 INFO ]: Using library mode [2018-06-22 05:43:42,412 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:43:42 BoogieIcfgContainer [2018-06-22 05:43:42,412 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 05:43:42,420 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 05:43:42,420 INFO ]: Initializing TraceAbstraction... [2018-06-22 05:43:42,617 INFO ]: TraceAbstraction initialized [2018-06-22 05:43:42,617 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:43:40" (1/3) ... [2018-06-22 05:43:42,618 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4638041b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:43:42, skipping insertion in model container [2018-06-22 05:43:42,619 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:43:41" (2/3) ... [2018-06-22 05:43:42,619 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4638041b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:43:42, skipping insertion in model container [2018-06-22 05:43:42,619 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:43:42" (3/3) ... [2018-06-22 05:43:42,622 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 05:43:42,682 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 05:43:42,755 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 05:43:43,129 INFO ]: Using default assertion order modulation [2018-06-22 05:43:43,130 INFO ]: Interprodecural is true [2018-06-22 05:43:43,130 INFO ]: Hoare is false [2018-06-22 05:43:43,130 INFO ]: Compute interpolants for FPandBP [2018-06-22 05:43:43,130 INFO ]: Backedges is TWOTRACK [2018-06-22 05:43:43,130 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 05:43:43,130 INFO ]: Difference is false [2018-06-22 05:43:43,130 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 05:43:43,130 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 05:43:43,314 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 05:43:43,386 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 05:43:43,388 INFO ]: Found error trace [2018-06-22 05:43:43,410 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:43:43,410 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:43:43,450 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-22 05:43:43,497 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:43:43,497 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:43:43,665 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:43:43,665 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:43:43,665 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:43:43,751 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:43:43,835 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:43:43,837 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 05:43:43,837 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 05:43:43,838 INFO ]: Interpolant automaton has 3 states [2018-06-22 05:43:43,872 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 05:43:43,872 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:43:43,905 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 05:43:44,067 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:43:44,068 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 05:43:44,068 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 05:43:44,077 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 05:43:44,077 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:43:44,137 INFO ]: With dead ends: 9 [2018-06-22 05:43:44,137 INFO ]: Without dead ends: 9 [2018-06-22 05:43:44,139 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:43:44,355 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 05:43:44,434 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 05:43:44,435 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 05:43:44,435 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 05:43:44,437 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 05:43:44,437 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:43:44,437 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 05:43:44,437 INFO ]: Interpolant automaton has 3 states. [2018-06-22 05:43:44,437 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 05:43:44,438 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 05:43:44,438 INFO ]: Found error trace [2018-06-22 05:43:44,438 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:43:44,438 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:43:44,438 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-22 05:43:44,438 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:43:44,438 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:43:44,440 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:43:44,440 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:43:44,440 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:43:44,499 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:43:44,726 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:43:44,727 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:43:44,727 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-22 05:43:44,745 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:43:44,804 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:43:44,820 INFO ]: Computing forward predicates... [2018-06-22 05:43:45,450 WARN ]: Spent 384.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 7 [2018-06-22 05:43:46,567 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:43:46,602 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:43:46,602 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 05:43:46,602 INFO ]: Interpolant automaton has 5 states [2018-06-22 05:43:46,603 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 05:43:46,603 INFO ]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-06-22 05:43:46,603 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 05:43:46,688 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:43:46,688 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 05:43:46,688 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 05:43:46,689 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 05:43:46,689 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:43:46,689 INFO ]: With dead ends: 10 [2018-06-22 05:43:46,689 INFO ]: Without dead ends: 10 [2018-06-22 05:43:46,690 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-06-22 05:43:46,690 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 05:43:46,691 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 05:43:46,691 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 05:43:46,691 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 05:43:46,691 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 05:43:46,692 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:43:46,692 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 05:43:46,692 INFO ]: Interpolant automaton has 5 states. [2018-06-22 05:43:46,692 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 05:43:46,692 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 05:43:46,692 INFO ]: Found error trace [2018-06-22 05:43:46,692 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:43:46,692 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:43:46,692 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-22 05:43:46,692 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:43:46,693 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:43:46,693 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:43:46,693 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:43:46,693 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:43:46,749 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:43:47,301 WARN ]: Spent 295.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2018-06-22 05:43:47,361 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:43:47,361 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:43:47,361 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 05:43:47,367 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 05:43:47,443 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:43:47,443 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:43:47,446 INFO ]: Computing forward predicates... [2018-06-22 05:43:48,369 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:43:48,398 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:43:48,398 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-22 05:43:48,398 INFO ]: Interpolant automaton has 6 states [2018-06-22 05:43:48,398 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 05:43:48,398 INFO ]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:43:48,399 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-22 05:43:48,541 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:43:48,541 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 05:43:48,541 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 05:43:48,541 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-22 05:43:48,541 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:43:48,542 INFO ]: With dead ends: 11 [2018-06-22 05:43:48,542 INFO ]: Without dead ends: 11 [2018-06-22 05:43:48,542 INFO ]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-06-22 05:43:48,542 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 05:43:48,543 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 05:43:48,543 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 05:43:48,544 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 05:43:48,544 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-22 05:43:48,544 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:43:48,544 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 05:43:48,544 INFO ]: Interpolant automaton has 6 states. [2018-06-22 05:43:48,544 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 05:43:48,544 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 05:43:48,544 INFO ]: Found error trace [2018-06-22 05:43:48,544 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:43:48,544 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:43:48,545 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 3 times [2018-06-22 05:43:48,545 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:43:48,545 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:43:48,545 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:43:48,546 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:43:48,546 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:43:48,594 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:43:48,785 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:43:48,785 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:43:48,785 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 05:43:48,797 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 05:43:48,860 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 05:43:48,860 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:43:48,864 INFO ]: Computing forward predicates... [2018-06-22 05:43:53,908 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:43:53,935 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:43:53,935 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-22 05:43:53,935 INFO ]: Interpolant automaton has 7 states [2018-06-22 05:43:53,935 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 05:43:53,935 INFO ]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-06-22 05:43:53,935 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-06-22 05:43:54,089 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:43:54,089 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 05:43:54,089 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 05:43:54,089 INFO ]: Start accepts. Automaton has 7 states. Word has length 10 [2018-06-22 05:43:54,089 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:43:54,090 INFO ]: With dead ends: 12 [2018-06-22 05:43:54,090 INFO ]: Without dead ends: 12 [2018-06-22 05:43:54,090 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-06-22 05:43:54,090 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 05:43:54,091 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 05:43:54,091 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 05:43:54,092 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 05:43:54,092 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-22 05:43:54,092 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:43:54,092 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 05:43:54,092 INFO ]: Interpolant automaton has 7 states. [2018-06-22 05:43:54,092 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 05:43:54,092 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 05:43:54,092 INFO ]: Found error trace [2018-06-22 05:43:54,092 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:43:54,092 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:43:54,092 INFO ]: Analyzing trace with hash 201204236, now seen corresponding path program 4 times [2018-06-22 05:43:54,092 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:43:54,092 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:43:54,093 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:43:54,093 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:43:54,093 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:43:54,187 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:43:54,878 WARN ]: Spent 437.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-06-22 05:43:54,908 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:43:54,908 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:43:54,908 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 05:43:54,917 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 05:43:54,983 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 05:43:54,983 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:43:54,987 INFO ]: Computing forward predicates... [2018-06-22 05:44:04,632 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:44:04,665 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:44:04,665 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-06-22 05:44:04,665 INFO ]: Interpolant automaton has 8 states [2018-06-22 05:44:04,665 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 05:44:04,665 INFO ]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-06-22 05:44:04,665 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 8 states. [2018-06-22 05:44:04,822 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:44:04,822 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 05:44:04,822 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 05:44:04,822 INFO ]: Start accepts. Automaton has 8 states. Word has length 11 [2018-06-22 05:44:04,822 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:44:04,822 INFO ]: With dead ends: 13 [2018-06-22 05:44:04,822 INFO ]: Without dead ends: 13 [2018-06-22 05:44:04,822 INFO ]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2018-06-22 05:44:04,823 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 05:44:04,824 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 05:44:04,824 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 05:44:04,824 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 05:44:04,824 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-22 05:44:04,824 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:44:04,824 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 05:44:04,824 INFO ]: Interpolant automaton has 8 states. [2018-06-22 05:44:04,824 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 05:44:04,826 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 05:44:04,826 INFO ]: Found error trace [2018-06-22 05:44:04,826 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:44:04,826 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:44:04,826 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 5 times [2018-06-22 05:44:04,826 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:44:04,826 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:44:04,827 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:44:04,827 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:44:04,827 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:44:04,869 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:44:05,204 WARN ]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-22 05:44:05,683 WARN ]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 05:44:06,262 WARN ]: Spent 506.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-06-22 05:44:06,303 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:44:06,303 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:44:06,303 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 05:44:06,310 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 05:44:06,375 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-22 05:44:06,375 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:44:06,379 INFO ]: Computing forward predicates... [2018-06-22 05:44:08,821 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 05:44:27,454 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:44:27,604 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:44:27,605 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-06-22 05:44:27,605 INFO ]: Interpolant automaton has 9 states [2018-06-22 05:44:27,605 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 05:44:27,605 INFO ]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-06-22 05:44:27,605 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 9 states. [2018-06-22 05:44:27,815 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:44:27,815 INFO ]: Finished difference Result 14 states and 14 transitions. [2018-06-22 05:44:27,815 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 05:44:27,815 INFO ]: Start accepts. Automaton has 9 states. Word has length 12 [2018-06-22 05:44:27,815 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:44:27,816 INFO ]: With dead ends: 14 [2018-06-22 05:44:27,816 INFO ]: Without dead ends: 14 [2018-06-22 05:44:27,816 INFO ]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2018-06-22 05:44:27,816 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-22 05:44:27,818 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-06-22 05:44:27,818 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-22 05:44:27,819 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-06-22 05:44:27,819 INFO ]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-06-22 05:44:27,819 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:44:27,819 INFO ]: Abstraction has 14 states and 14 transitions. [2018-06-22 05:44:27,819 INFO ]: Interpolant automaton has 9 states. [2018-06-22 05:44:27,819 INFO ]: Start isEmpty. Operand 14 states and 14 transitions. [2018-06-22 05:44:27,820 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 05:44:27,820 INFO ]: Found error trace [2018-06-22 05:44:27,820 INFO ]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:44:27,820 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:44:27,820 INFO ]: Analyzing trace with hash 23503628, now seen corresponding path program 6 times [2018-06-22 05:44:27,820 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:44:27,820 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:44:27,821 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:44:27,821 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:44:27,821 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:44:27,925 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:44:28,253 WARN ]: Spent 212.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 10 [2018-06-22 05:44:28,399 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:44:28,399 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:44:28,399 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 05:44:28,478 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 05:44:28,542 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-06-22 05:44:28,542 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:44:28,547 INFO ]: Computing forward predicates... [2018-06-22 05:44:30,135 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:44:30,141 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:44:30,157 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:44:30,165 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:44:30,173 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:44:30,189 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:44:30,195 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:44:30,200 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:44:30,204 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:44:30,206 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:44:30,209 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:44:30,231 WARN ]: expecting exponential blowup for input size 9 [2018-06-22 05:44:30,462 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:44:30,470 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:44:30,511 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:44:30,519 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:44:30,527 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:44:30,534 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:44:30,547 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 05:44:30,698 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:44:30,723 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:44:30,774 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:44:30,880 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:44:30,886 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 05:44:31,024 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:44:31,040 WARN ]: expecting exponential blowup for input size 6 Received shutdown request... [2018-06-22 05:44:48,400 INFO ]: Timeout while computing interpolants [2018-06-22 05:44:48,600 WARN ]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:44:48,600 WARN ]: Verification canceled [2018-06-22 05:44:48,604 WARN ]: Timeout [2018-06-22 05:44:48,604 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 05:44:48 BoogieIcfgContainer [2018-06-22 05:44:48,604 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 05:44:48,605 INFO ]: Toolchain (without parser) took 67860.06 ms. Allocated memory was 306.2 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 256.6 MB in the beginning and 170.2 MB in the end (delta: 86.4 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 05:44:48,606 INFO ]: SmtParser took 0.09 ms. Allocated memory is still 306.2 MB. Free memory is still 271.7 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 05:44:48,606 INFO ]: ChcToBoogie took 703.39 ms. Allocated memory is still 306.2 MB. Free memory was 256.6 MB in the beginning and 254.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:44:48,607 INFO ]: Boogie Preprocessor took 97.13 ms. Allocated memory is still 306.2 MB. Free memory was 254.6 MB in the beginning and 252.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:44:48,607 INFO ]: RCFGBuilder took 857.68 ms. Allocated memory is still 306.2 MB. Free memory was 252.5 MB in the beginning and 241.5 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:44:48,607 INFO ]: TraceAbstraction took 66184.29 ms. Allocated memory was 306.2 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 240.5 MB in the beginning and 170.2 MB in the end (delta: 70.3 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 05:44:48,613 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 271.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 703.39 ms. Allocated memory is still 306.2 MB. Free memory was 256.6 MB in the beginning and 254.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 97.13 ms. Allocated memory is still 306.2 MB. Free memory was 254.6 MB in the beginning and 252.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 857.68 ms. Allocated memory is still 306.2 MB. Free memory was 252.5 MB in the beginning and 241.5 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 66184.29 ms. Allocated memory was 306.2 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 240.5 MB in the beginning and 170.2 MB in the end (delta: 70.3 MB). Peak memory consumption was 1.3 GB. 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 14 with TraceHistMax 6, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while XnfDer was eliminating 20609 quantified variables from 13 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 65.4s OverallTime, 7 OverallIterations, 6 TraceHistogramMax, 1.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 42 SDtfs, 10 SDslu, 97 SDs, 0 SdLazy, 40 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 96 GetRequests, 37 SyntacticMatches, 15 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 4.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred in iteration=6, 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: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 41.7s InterpolantComputationTime, 107 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 96 ConstructedInterpolants, 0 QuantifiedInterpolants, 4136 SizeOfPredicates, 25 NumberOfNonLiveVariables, 1000 ConjunctsInSsa, 154 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 0/70 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nest-if8.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_05-44-48-624.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nest-if8.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_05-44-48-624.csv Completed graceful shutdown