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/nested6.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 05:36:34,414 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 05:36:34,418 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 05:36:34,431 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 05:36:34,431 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 05:36:34,432 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 05:36:34,435 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 05:36:34,438 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 05:36:34,439 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 05:36:34,441 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 05:36:34,442 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 05:36:34,442 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 05:36:34,443 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 05:36:34,444 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 05:36:34,447 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 05:36:34,448 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 05:36:34,450 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 05:36:34,460 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 05:36:34,462 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 05:36:34,463 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 05:36:34,464 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 05:36:34,468 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 05:36:34,469 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 05:36:34,469 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 05:36:34,470 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 05:36:34,471 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 05:36:34,474 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 05:36:34,474 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 05:36:34,475 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 05:36:34,476 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 05:36:34,476 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 05:36:34,482 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 05:36:34,482 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 05:36:34,483 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 05:36:34,483 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 05:36:34,484 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 05:36:34,500 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 05:36:34,500 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 05:36:34,501 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 05:36:34,501 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 05:36:34,502 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 05:36:34,502 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 05:36:34,503 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 05:36:34,503 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 05:36:34,503 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:36:34,503 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 05:36:34,503 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 05:36:34,503 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 05:36:34,504 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 05:36:34,504 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 05:36:34,504 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 05:36:34,504 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 05:36:34,504 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 05:36:34,508 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 05:36:34,509 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 05:36:34,558 INFO ]: Repository-Root is: /tmp [2018-06-22 05:36:34,576 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 05:36:34,581 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 05:36:34,583 INFO ]: Initializing SmtParser... [2018-06-22 05:36:34,583 INFO ]: SmtParser initialized [2018-06-22 05:36:34,584 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested6.c.smt2 [2018-06-22 05:36:34,585 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 05:36:34,682 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested6.c.smt2 unknown [2018-06-22 05:36:34,987 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested6.c.smt2 [2018-06-22 05:36:34,992 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 05:36:35,000 INFO ]: Walking toolchain with 4 elements. [2018-06-22 05:36:35,001 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 05:36:35,001 INFO ]: Initializing ChcToBoogie... [2018-06-22 05:36:35,001 INFO ]: ChcToBoogie initialized [2018-06-22 05:36:35,004 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:36:34" (1/1) ... [2018-06-22 05:36:35,067 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:36:35 Unit [2018-06-22 05:36:35,067 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 05:36:35,071 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 05:36:35,071 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 05:36:35,071 INFO ]: Boogie Preprocessor initialized [2018-06-22 05:36:35,095 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:36:35" (1/1) ... [2018-06-22 05:36:35,095 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:36:35" (1/1) ... [2018-06-22 05:36:35,104 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:36:35" (1/1) ... [2018-06-22 05:36:35,104 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:36:35" (1/1) ... [2018-06-22 05:36:35,113 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:36:35" (1/1) ... [2018-06-22 05:36:35,115 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:36:35" (1/1) ... [2018-06-22 05:36:35,117 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:36:35" (1/1) ... [2018-06-22 05:36:35,119 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 05:36:35,120 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 05:36:35,120 INFO ]: Initializing RCFGBuilder... [2018-06-22 05:36:35,120 INFO ]: RCFGBuilder initialized [2018-06-22 05:36:35,121 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:36:35" (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 05:36:35,133 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 05:36:35,133 INFO ]: Found specification of procedure gotoProc [2018-06-22 05:36:35,133 INFO ]: Found implementation of procedure gotoProc [2018-06-22 05:36:35,133 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 05:36:35,133 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 05:36:35,133 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 05:36:35,374 INFO ]: Using library mode [2018-06-22 05:36:35,375 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:36:35 BoogieIcfgContainer [2018-06-22 05:36:35,375 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 05:36:35,379 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 05:36:35,379 INFO ]: Initializing TraceAbstraction... [2018-06-22 05:36:35,386 INFO ]: TraceAbstraction initialized [2018-06-22 05:36:35,386 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:36:34" (1/3) ... [2018-06-22 05:36:35,387 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@125c7546 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:36:35, skipping insertion in model container [2018-06-22 05:36:35,387 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:36:35" (2/3) ... [2018-06-22 05:36:35,387 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@125c7546 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:36:35, skipping insertion in model container [2018-06-22 05:36:35,388 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:36:35" (3/3) ... [2018-06-22 05:36:35,392 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 05:36:35,402 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 05:36:35,419 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 05:36:35,466 INFO ]: Using default assertion order modulation [2018-06-22 05:36:35,467 INFO ]: Interprodecural is true [2018-06-22 05:36:35,467 INFO ]: Hoare is false [2018-06-22 05:36:35,467 INFO ]: Compute interpolants for FPandBP [2018-06-22 05:36:35,467 INFO ]: Backedges is TWOTRACK [2018-06-22 05:36:35,467 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 05:36:35,467 INFO ]: Difference is false [2018-06-22 05:36:35,467 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 05:36:35,467 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 05:36:35,479 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 05:36:35,490 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 05:36:35,490 INFO ]: Found error trace [2018-06-22 05:36:35,491 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:36:35,491 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:36:35,497 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-22 05:36:35,499 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:36:35,499 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:36:35,535 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:36:35,536 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:36:35,536 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:36:35,579 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:36:35,753 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:36:35,757 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 05:36:35,757 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 05:36:35,759 INFO ]: Interpolant automaton has 3 states [2018-06-22 05:36:35,776 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 05:36:35,776 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:36:35,779 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 05:36:35,852 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:36:35,852 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 05:36:35,853 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 05:36:35,854 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 05:36:35,855 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:36:35,865 INFO ]: With dead ends: 9 [2018-06-22 05:36:35,865 INFO ]: Without dead ends: 9 [2018-06-22 05:36:35,866 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:36:35,879 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 05:36:35,896 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 05:36:35,898 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 05:36:35,898 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 05:36:35,899 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 05:36:35,900 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:36:35,900 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 05:36:35,900 INFO ]: Interpolant automaton has 3 states. [2018-06-22 05:36:35,900 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 05:36:35,900 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 05:36:35,900 INFO ]: Found error trace [2018-06-22 05:36:35,900 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:36:35,900 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:36:35,900 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-22 05:36:35,900 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:36:35,900 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:36:35,901 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:36:35,901 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:36:35,901 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:36:35,977 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:36:36,150 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:36:36,151 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:36:36,151 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 05:36:36,160 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:36:36,221 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:36:36,232 INFO ]: Computing forward predicates... [2018-06-22 05:36:36,585 WARN ]: Spent 267.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 8 [2018-06-22 05:36:37,526 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:36:37,547 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:36:37,547 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 05:36:37,548 INFO ]: Interpolant automaton has 5 states [2018-06-22 05:36:37,548 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 05:36:37,548 INFO ]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-22 05:36:37,548 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 05:36:37,668 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:36:37,669 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 05:36:37,669 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 05:36:37,669 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 05:36:37,669 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:36:37,669 INFO ]: With dead ends: 11 [2018-06-22 05:36:37,669 INFO ]: Without dead ends: 11 [2018-06-22 05:36:37,670 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:36:37,670 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 05:36:37,671 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 05:36:37,671 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 05:36:37,671 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 05:36:37,671 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-22 05:36:37,671 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:36:37,672 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 05:36:37,672 INFO ]: Interpolant automaton has 5 states. [2018-06-22 05:36:37,672 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 05:36:37,672 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 05:36:37,672 INFO ]: Found error trace [2018-06-22 05:36:37,672 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:36:37,672 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:36:37,672 INFO ]: Analyzing trace with hash 1062095287, now seen corresponding path program 2 times [2018-06-22 05:36:37,672 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:36:37,672 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:36:37,674 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:36:37,674 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:36:37,674 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:36:37,782 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:36:38,138 WARN ]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 05:36:38,139 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:36:38,139 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:36:38,139 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 05:36:38,146 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 05:36:38,213 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:36:38,213 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:36:38,217 INFO ]: Computing forward predicates... [2018-06-22 05:36:38,801 WARN ]: Spent 326.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 10 [2018-06-22 05:36:46,216 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:36:46,248 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:36:46,248 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-22 05:36:46,248 INFO ]: Interpolant automaton has 7 states [2018-06-22 05:36:46,248 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 05:36:46,248 INFO ]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-06-22 05:36:46,249 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-06-22 05:36:46,409 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:36:46,409 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 05:36:46,409 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 05:36:46,409 INFO ]: Start accepts. Automaton has 7 states. Word has length 10 [2018-06-22 05:36:46,409 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:36:46,410 INFO ]: With dead ends: 12 [2018-06-22 05:36:46,410 INFO ]: Without dead ends: 12 [2018-06-22 05:36:46,410 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-06-22 05:36:46,410 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 05:36:46,411 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 05:36:46,411 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 05:36:46,411 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 05:36:46,411 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-22 05:36:46,412 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:36:46,412 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 05:36:46,412 INFO ]: Interpolant automaton has 7 states. [2018-06-22 05:36:46,412 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 05:36:46,412 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 05:36:46,412 INFO ]: Found error trace [2018-06-22 05:36:46,412 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:36:46,412 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:36:46,412 INFO ]: Analyzing trace with hash -1433955954, now seen corresponding path program 3 times [2018-06-22 05:36:46,412 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:36:46,412 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:36:46,413 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:36:46,413 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:36:46,413 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:36:46,519 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:36:46,836 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:36:46,836 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:36:46,836 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 05:36:46,847 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 05:36:46,924 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 05:36:46,924 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:36:46,928 INFO ]: Computing forward predicates... [2018-06-22 05:36:49,349 WARN ]: Spent 121.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 18 [2018-06-22 05:36:52,707 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:36:52,728 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:36:52,728 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-06-22 05:36:52,729 INFO ]: Interpolant automaton has 9 states [2018-06-22 05:36:52,729 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 05:36:52,729 INFO ]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-06-22 05:36:52,729 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 9 states. [2018-06-22 05:36:52,934 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:36:52,934 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 05:36:52,934 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 05:36:52,934 INFO ]: Start accepts. Automaton has 9 states. Word has length 11 [2018-06-22 05:36:52,934 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:36:52,934 INFO ]: With dead ends: 13 [2018-06-22 05:36:52,934 INFO ]: Without dead ends: 13 [2018-06-22 05:36:52,935 INFO ]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2018-06-22 05:36:52,935 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 05:36:52,936 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 05:36:52,936 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 05:36:52,937 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 05:36:52,937 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-22 05:36:52,937 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:36:52,937 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 05:36:52,937 INFO ]: Interpolant automaton has 9 states. [2018-06-22 05:36:52,937 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 05:36:52,937 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 05:36:52,937 INFO ]: Found error trace [2018-06-22 05:36:52,937 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:36:52,937 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:36:52,938 INFO ]: Analyzing trace with hash -1502133097, now seen corresponding path program 4 times [2018-06-22 05:36:52,938 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:36:52,938 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:36:52,938 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:36:52,938 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:36:52,938 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:36:52,989 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:36:53,200 WARN ]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 05:36:53,394 WARN ]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 05:36:53,492 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:36:53,492 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:36:53,492 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 05:36:53,498 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 05:36:53,548 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 05:36:53,548 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:36:53,552 INFO ]: Computing forward predicates... [2018-06-22 05:36:57,477 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:37:04,002 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:37:04,024 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:37:04,024 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-06-22 05:37:04,025 INFO ]: Interpolant automaton has 9 states [2018-06-22 05:37:04,025 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 05:37:04,025 INFO ]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-06-22 05:37:04,026 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 9 states. [2018-06-22 05:37:04,318 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:37:04,318 INFO ]: Finished difference Result 14 states and 14 transitions. [2018-06-22 05:37:04,318 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 05:37:04,318 INFO ]: Start accepts. Automaton has 9 states. Word has length 12 [2018-06-22 05:37:04,318 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:37:04,319 INFO ]: With dead ends: 14 [2018-06-22 05:37:04,319 INFO ]: Without dead ends: 14 [2018-06-22 05:37:04,319 INFO ]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2018-06-22 05:37:04,319 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-22 05:37:04,320 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-06-22 05:37:04,320 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-22 05:37:04,321 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-06-22 05:37:04,321 INFO ]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-06-22 05:37:04,321 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:37:04,321 INFO ]: Abstraction has 14 states and 14 transitions. [2018-06-22 05:37:04,321 INFO ]: Interpolant automaton has 9 states. [2018-06-22 05:37:04,321 INFO ]: Start isEmpty. Operand 14 states and 14 transitions. [2018-06-22 05:37:04,321 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 05:37:04,322 INFO ]: Found error trace [2018-06-22 05:37:04,322 INFO ]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:37:04,322 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:37:04,322 INFO ]: Analyzing trace with hash 679342766, now seen corresponding path program 5 times [2018-06-22 05:37:04,322 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:37:04,322 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:37:04,323 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:37:04,323 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:37:04,323 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:37:04,434 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:37:05,274 WARN ]: Spent 617.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-06-22 05:37:05,759 WARN ]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 05:37:05,835 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:37:05,835 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:37:05,835 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 05:37:05,842 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 05:37:05,913 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-22 05:37:05,913 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:37:05,918 INFO ]: Computing forward predicates... [2018-06-22 05:37:06,142 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:37:10,608 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:37:33,624 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:37:33,657 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:37:33,657 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-06-22 05:37:33,657 INFO ]: Interpolant automaton has 10 states [2018-06-22 05:37:33,657 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 05:37:33,657 INFO ]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-06-22 05:37:33,657 INFO ]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2018-06-22 05:37:33,969 WARN ]: Spent 130.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 10 [2018-06-22 05:37:34,022 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:37:34,022 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-22 05:37:34,022 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 05:37:34,022 INFO ]: Start accepts. Automaton has 10 states. Word has length 13 [2018-06-22 05:37:34,022 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:37:34,022 INFO ]: With dead ends: 15 [2018-06-22 05:37:34,022 INFO ]: Without dead ends: 15 [2018-06-22 05:37:34,023 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2018-06-22 05:37:34,023 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 05:37:34,024 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 05:37:34,024 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 05:37:34,024 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-06-22 05:37:34,024 INFO ]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-06-22 05:37:34,024 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:37:34,025 INFO ]: Abstraction has 15 states and 15 transitions. [2018-06-22 05:37:34,025 INFO ]: Interpolant automaton has 10 states. [2018-06-22 05:37:34,025 INFO ]: Start isEmpty. Operand 15 states and 15 transitions. [2018-06-22 05:37:34,025 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-22 05:37:34,025 INFO ]: Found error trace [2018-06-22 05:37:34,025 INFO ]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:37:34,025 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:37:34,025 INFO ]: Analyzing trace with hash -414382217, now seen corresponding path program 6 times [2018-06-22 05:37:34,025 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:37:34,025 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:37:34,026 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:37:34,026 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:37:34,026 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:37:34,149 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:37:34,518 WARN ]: Spent 100.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2018-06-22 05:37:34,774 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:37:34,774 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:37:34,774 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 05:37:34,849 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 05:37:34,932 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-06-22 05:37:34,932 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:37:34,937 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-22 05:37:36,350 INFO ]: Timeout while computing interpolants [2018-06-22 05:37:36,550 WARN ]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:37:36,550 WARN ]: Verification canceled [2018-06-22 05:37:36,558 WARN ]: Timeout [2018-06-22 05:37:36,558 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 05:37:36 BoogieIcfgContainer [2018-06-22 05:37:36,558 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 05:37:36,559 INFO ]: Toolchain (without parser) took 61566.56 ms. Allocated memory was 304.1 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 255.5 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 05:37:36,560 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 304.1 MB. Free memory is still 269.6 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 05:37:36,560 INFO ]: ChcToBoogie took 66.56 ms. Allocated memory is still 304.1 MB. Free memory was 255.5 MB in the beginning and 252.5 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:37:36,561 INFO ]: Boogie Preprocessor took 47.87 ms. Allocated memory is still 304.1 MB. Free memory was 252.5 MB in the beginning and 251.5 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-22 05:37:36,561 INFO ]: RCFGBuilder took 255.17 ms. Allocated memory is still 304.1 MB. Free memory was 251.5 MB in the beginning and 240.4 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 3.6 GB. [2018-06-22 05:37:36,567 INFO ]: TraceAbstraction took 61179.16 ms. Allocated memory was 304.1 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 240.4 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 05:37:36,570 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.08 ms. Allocated memory is still 304.1 MB. Free memory is still 269.6 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 66.56 ms. Allocated memory is still 304.1 MB. Free memory was 255.5 MB in the beginning and 252.5 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 47.87 ms. Allocated memory is still 304.1 MB. Free memory was 252.5 MB in the beginning and 251.5 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 255.17 ms. Allocated memory is still 304.1 MB. Free memory was 251.5 MB in the beginning and 240.4 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 3.6 GB. * TraceAbstraction took 61179.16 ms. Allocated memory was 304.1 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 240.4 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). 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 15 with TraceHistMax 7, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while XnfDer was eliminating 3112 quantified variables from 8 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 61.0s OverallTime, 7 OverallIterations, 7 TraceHistogramMax, 1.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 42 SDtfs, 14 SDslu, 136 SDs, 0 SdLazy, 53 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 108 GetRequests, 37 SyntacticMatches, 18 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 4.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred 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: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 56.1s InterpolantComputationTime, 115 NumberOfCodeBlocks, 115 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 104 ConstructedInterpolants, 0 QuantifiedInterpolants, 5875 SizeOfPredicates, 25 NumberOfNonLiveVariables, 1127 ConjunctsInSsa, 193 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 0/106 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/nested6.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_05-37-36-587.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nested6.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_05-37-36-587.csv Completed graceful shutdown