java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig07.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:54:53,513 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:54:53,515 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:54:53,529 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:54:53,529 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:54:53,531 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:54:53,532 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:54:53,535 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:54:53,537 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:54:53,537 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:54:53,539 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:54:53,540 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:54:53,540 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:54:53,541 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:54:53,543 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:54:53,544 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:54:53,546 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:54:53,555 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:54:53,556 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:54:53,557 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:54:53,558 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:54:53,563 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:54:53,563 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:54:53,563 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:54:53,564 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:54:53,565 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:54:53,567 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:54:53,568 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:54:53,569 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:54:53,569 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:54:53,569 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:54:53,573 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:54:53,574 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:54:53,575 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:54:53,575 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:54:53,575 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 14:54:53,593 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:54:53,594 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:54:53,594 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:54:53,594 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:54:53,595 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:54:53,595 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:54:53,595 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:54:53,596 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:54:53,596 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:54:53,596 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:54:53,596 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:54:53,596 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:54:53,596 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:54:53,597 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:54:53,599 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:54:53,599 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:54:53,599 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:54:53,600 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:54:53,600 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:54:53,601 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:54:53,601 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:54:53,641 INFO ]: Repository-Root is: /tmp [2018-06-22 14:54:53,659 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:54:53,664 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:54:53,666 INFO ]: Initializing SmtParser... [2018-06-22 14:54:53,667 INFO ]: SmtParser initialized [2018-06-22 14:54:53,667 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig07.c.smt2 [2018-06-22 14:54:53,668 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-22 14:54:53,759 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig07.c.smt2 unknown [2018-06-22 14:54:53,989 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig07.c.smt2 [2018-06-22 14:54:53,994 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:54:54,001 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:54:54,001 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:54:54,001 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:54:54,001 INFO ]: ChcToBoogie initialized [2018-06-22 14:54:54,005 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:54:53" (1/1) ... [2018-06-22 14:54:54,050 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:54:54 Unit [2018-06-22 14:54:54,050 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:54:54,051 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:54:54,051 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:54:54,051 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:54:54,077 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:54:54" (1/1) ... [2018-06-22 14:54:54,077 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:54:54" (1/1) ... [2018-06-22 14:54:54,085 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:54:54" (1/1) ... [2018-06-22 14:54:54,086 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:54:54" (1/1) ... [2018-06-22 14:54:54,088 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:54:54" (1/1) ... [2018-06-22 14:54:54,091 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:54:54" (1/1) ... [2018-06-22 14:54:54,092 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:54:54" (1/1) ... [2018-06-22 14:54:54,093 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:54:54,100 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:54:54,100 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:54:54,100 INFO ]: RCFGBuilder initialized [2018-06-22 14:54:54,101 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:54:54" (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 14:54:54,114 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:54:54,114 INFO ]: Found specification of procedure False [2018-06-22 14:54:54,114 INFO ]: Found implementation of procedure False [2018-06-22 14:54:54,114 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:54:54,114 INFO ]: Found specification of procedure state [2018-06-22 14:54:54,114 INFO ]: Found implementation of procedure state [2018-06-22 14:54:54,114 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:54:54,114 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:54:54,114 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 14:54:54,379 INFO ]: Using library mode [2018-06-22 14:54:54,380 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:54:54 BoogieIcfgContainer [2018-06-22 14:54:54,380 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:54:54,381 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:54:54,381 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:54:54,384 INFO ]: TraceAbstraction initialized [2018-06-22 14:54:54,384 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:54:53" (1/3) ... [2018-06-22 14:54:54,385 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5097d0a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:54:54, skipping insertion in model container [2018-06-22 14:54:54,385 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:54:54" (2/3) ... [2018-06-22 14:54:54,386 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5097d0a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:54:54, skipping insertion in model container [2018-06-22 14:54:54,386 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:54:54" (3/3) ... [2018-06-22 14:54:54,397 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:54:54,409 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:54:54,426 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:54:54,496 INFO ]: Using default assertion order modulation [2018-06-22 14:54:54,496 INFO ]: Interprodecural is true [2018-06-22 14:54:54,496 INFO ]: Hoare is false [2018-06-22 14:54:54,496 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:54:54,496 INFO ]: Backedges is TWOTRACK [2018-06-22 14:54:54,496 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:54:54,496 INFO ]: Difference is false [2018-06-22 14:54:54,496 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:54:54,496 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:54:54,515 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:54:54,534 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:54:54,534 INFO ]: Found error trace [2018-06-22 14:54:54,535 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:54:54,536 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:54:54,539 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 14:54:54,541 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:54:54,541 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:54:54,579 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:54:54,579 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:54:54,579 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:54:54,607 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:54:54,690 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:54:54,692 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:54:54,692 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:54:54,694 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:54:54,704 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:54:54,705 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:54:54,706 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:54:54,765 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:54:54,765 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:54:54,766 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:54:54,767 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:54:54,768 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:54:54,779 INFO ]: With dead ends: 13 [2018-06-22 14:54:54,779 INFO ]: Without dead ends: 13 [2018-06-22 14:54:54,781 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:54:54,798 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:54:54,817 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:54:54,818 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:54:54,819 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:54:54,820 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:54:54,820 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:54:54,821 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:54:54,821 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:54:54,821 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:54:54,822 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:54:54,822 INFO ]: Found error trace [2018-06-22 14:54:54,823 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:54:54,823 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:54:54,823 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 14:54:54,823 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:54:54,823 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:54:54,824 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:54:54,824 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:54:54,824 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:54:54,848 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:54:55,016 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:54:55,016 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:54:55,016 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:54:55,025 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:54:55,049 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:54:55,056 INFO ]: Computing forward predicates... [2018-06-22 14:54:55,220 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:54:55,242 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:54:55,242 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-06-22 14:54:55,242 INFO ]: Interpolant automaton has 6 states [2018-06-22 14:54:55,243 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 14:54:55,243 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 14:54:55,243 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 6 states. [2018-06-22 14:54:55,405 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:54:55,405 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 14:54:55,406 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 14:54:55,406 INFO ]: Start accepts. Automaton has 6 states. Word has length 13 [2018-06-22 14:54:55,406 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:54:55,407 INFO ]: With dead ends: 15 [2018-06-22 14:54:55,407 INFO ]: Without dead ends: 15 [2018-06-22 14:54:55,408 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 14:54:55,408 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 14:54:55,411 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 14:54:55,411 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 14:54:55,412 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 14:54:55,412 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 14:54:55,412 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:54:55,412 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 14:54:55,412 INFO ]: Interpolant automaton has 6 states. [2018-06-22 14:54:55,412 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 14:54:55,413 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 14:54:55,413 INFO ]: Found error trace [2018-06-22 14:54:55,413 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:54:55,413 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:54:55,413 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 14:54:55,413 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:54:55,413 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:54:55,415 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:54:55,415 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:54:55,415 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:54:55,445 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:54:55,772 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:54:55,773 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:54:55,773 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:54:55,779 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 14:54:55,833 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:54:55,833 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:54:55,836 INFO ]: Computing forward predicates... [2018-06-22 14:54:56,104 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:54:56,126 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:54:56,126 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-06-22 14:54:56,126 INFO ]: Interpolant automaton has 8 states [2018-06-22 14:54:56,126 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 14:54:56,127 INFO ]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-06-22 14:54:56,127 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2018-06-22 14:54:56,325 WARN ]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-06-22 14:54:56,521 WARN ]: Spent 172.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 15 [2018-06-22 14:54:56,625 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:54:56,625 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 14:54:56,627 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:54:56,627 INFO ]: Start accepts. Automaton has 8 states. Word has length 17 [2018-06-22 14:54:56,627 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:54:56,627 INFO ]: With dead ends: 17 [2018-06-22 14:54:56,627 INFO ]: Without dead ends: 17 [2018-06-22 14:54:56,628 INFO ]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-06-22 14:54:56,628 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 14:54:56,630 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 14:54:56,630 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 14:54:56,633 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 14:54:56,633 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 14:54:56,633 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:54:56,633 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 14:54:56,633 INFO ]: Interpolant automaton has 8 states. [2018-06-22 14:54:56,633 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 14:54:56,634 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 14:54:56,634 INFO ]: Found error trace [2018-06-22 14:54:56,634 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:54:56,634 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:54:56,634 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 14:54:56,634 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:54:56,634 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:54:56,635 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:54:56,635 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:54:56,635 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:54:56,658 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:54:57,057 WARN ]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-06-22 14:54:57,270 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:54:57,270 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:54:57,270 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:54:57,280 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 14:54:57,314 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 14:54:57,314 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:54:57,317 INFO ]: Computing forward predicates... [2018-06-22 14:54:58,552 WARN ]: Spent 920.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 32 [2018-06-22 14:54:59,119 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:54:59,149 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:54:59,149 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2018-06-22 14:54:59,149 INFO ]: Interpolant automaton has 13 states [2018-06-22 14:54:59,149 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 14:54:59,150 INFO ]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2018-06-22 14:54:59,150 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 13 states. [2018-06-22 14:54:59,486 WARN ]: Spent 280.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2018-06-22 14:54:59,785 WARN ]: Spent 281.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 18 [2018-06-22 14:54:59,943 WARN ]: Spent 144.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2018-06-22 14:55:00,129 WARN ]: Spent 166.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2018-06-22 14:55:00,146 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:55:00,146 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 14:55:00,147 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 14:55:00,147 INFO ]: Start accepts. Automaton has 13 states. Word has length 21 [2018-06-22 14:55:00,147 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:55:00,147 INFO ]: With dead ends: 19 [2018-06-22 14:55:00,148 INFO ]: Without dead ends: 19 [2018-06-22 14:55:00,148 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2018-06-22 14:55:00,148 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 14:55:00,151 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 14:55:00,152 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 14:55:00,152 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 14:55:00,152 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 14:55:00,152 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:55:00,152 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 14:55:00,152 INFO ]: Interpolant automaton has 13 states. [2018-06-22 14:55:00,153 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 14:55:00,153 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 14:55:00,153 INFO ]: Found error trace [2018-06-22 14:55:00,153 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:55:00,153 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:55:00,154 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-22 14:55:00,154 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:55:00,154 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:55:00,154 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:55:00,154 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:55:00,154 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:55:00,204 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:55:00,668 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 14:55:00,668 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:55:00,668 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:55:00,673 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 14:55:00,698 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 14:55:00,698 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:55:00,701 INFO ]: Computing forward predicates... [2018-06-22 14:55:03,352 WARN ]: Spent 2.36 s on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2018-06-22 14:55:04,087 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 14:55:04,106 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:55:04,106 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2018-06-22 14:55:04,106 INFO ]: Interpolant automaton has 17 states [2018-06-22 14:55:04,107 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 14:55:04,107 INFO ]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2018-06-22 14:55:04,107 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 17 states. [2018-06-22 14:55:04,624 WARN ]: Spent 490.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2018-06-22 14:55:04,785 WARN ]: Spent 133.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 19 [2018-06-22 14:55:05,227 WARN ]: Spent 424.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2018-06-22 14:55:05,541 WARN ]: Spent 295.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2018-06-22 14:55:06,219 WARN ]: Spent 643.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2018-06-22 14:55:06,250 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:55:06,251 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 14:55:06,253 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 14:55:06,253 INFO ]: Start accepts. Automaton has 17 states. Word has length 25 [2018-06-22 14:55:06,253 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:55:06,254 INFO ]: With dead ends: 21 [2018-06-22 14:55:06,254 INFO ]: Without dead ends: 21 [2018-06-22 14:55:06,254 INFO ]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2018-06-22 14:55:06,254 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 14:55:06,257 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 14:55:06,257 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 14:55:06,258 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 14:55:06,258 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 14:55:06,258 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:55:06,258 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 14:55:06,258 INFO ]: Interpolant automaton has 17 states. [2018-06-22 14:55:06,258 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 14:55:06,259 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 14:55:06,259 INFO ]: Found error trace [2018-06-22 14:55:06,259 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:55:06,259 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:55:06,259 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 5 times [2018-06-22 14:55:06,259 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:55:06,259 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:55:06,260 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:55:06,260 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:55:06,260 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:55:06,319 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:55:06,637 WARN ]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-06-22 14:55:07,001 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 14:55:07,001 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:55:07,001 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:55:07,008 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 14:55:07,118 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 14:55:07,118 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:55:07,123 INFO ]: Computing forward predicates... [2018-06-22 14:55:07,456 WARN ]: Spent 192.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 26 [2018-06-22 14:55:07,634 WARN ]: Spent 151.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2018-06-22 14:55:08,485 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 14:55:08,505 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:55:08,519 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2018-06-22 14:55:08,519 INFO ]: Interpolant automaton has 20 states [2018-06-22 14:55:08,520 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-22 14:55:08,520 INFO ]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2018-06-22 14:55:08,520 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 20 states. [2018-06-22 14:55:08,955 WARN ]: Spent 370.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2018-06-22 14:55:09,124 WARN ]: Spent 135.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 34 [2018-06-22 14:55:09,403 WARN ]: Spent 243.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 34 [2018-06-22 14:55:09,760 WARN ]: Spent 331.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 59 [2018-06-22 14:55:10,088 WARN ]: Spent 296.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 52 [2018-06-22 14:55:10,481 WARN ]: Spent 365.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2018-06-22 14:55:10,517 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:55:10,517 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 14:55:10,517 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 14:55:10,517 INFO ]: Start accepts. Automaton has 20 states. Word has length 29 [2018-06-22 14:55:10,517 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:55:10,518 INFO ]: With dead ends: 23 [2018-06-22 14:55:10,518 INFO ]: Without dead ends: 23 [2018-06-22 14:55:10,518 INFO ]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2018-06-22 14:55:10,518 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 14:55:10,521 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 14:55:10,521 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 14:55:10,522 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 14:55:10,522 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 14:55:10,522 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:55:10,522 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 14:55:10,522 INFO ]: Interpolant automaton has 20 states. [2018-06-22 14:55:10,522 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 14:55:10,523 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 14:55:10,523 INFO ]: Found error trace [2018-06-22 14:55:10,523 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:55:10,523 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:55:10,523 INFO ]: Analyzing trace with hash -1661294575, now seen corresponding path program 6 times [2018-06-22 14:55:10,523 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:55:10,523 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:55:10,524 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:55:10,524 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:55:10,524 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:55:10,592 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:55:11,158 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 14:55:11,159 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:55:11,159 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:55:11,165 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 14:55:11,211 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-22 14:55:11,211 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:55:11,225 INFO ]: Computing forward predicates... [2018-06-22 14:55:11,500 WARN ]: Spent 234.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2018-06-22 14:55:11,680 WARN ]: Spent 149.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2018-06-22 14:55:12,519 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 14:55:12,550 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:55:12,550 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2018-06-22 14:55:12,551 INFO ]: Interpolant automaton has 22 states [2018-06-22 14:55:12,551 INFO ]: Constructing interpolant automaton starting with 22 interpolants. [2018-06-22 14:55:12,551 INFO ]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2018-06-22 14:55:12,551 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 22 states. [2018-06-22 14:55:13,442 WARN ]: Spent 743.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 82 [2018-06-22 14:55:13,690 WARN ]: Spent 202.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 41 [2018-06-22 14:55:13,961 WARN ]: Spent 242.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 34 [2018-06-22 14:55:14,415 WARN ]: Spent 417.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 56 [2018-06-22 14:55:14,754 WARN ]: Spent 302.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 52 [2018-06-22 14:55:15,286 WARN ]: Spent 458.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 55 [2018-06-22 14:55:15,897 WARN ]: Spent 581.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2018-06-22 14:55:15,928 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:55:15,928 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 14:55:15,928 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 14:55:15,928 INFO ]: Start accepts. Automaton has 22 states. Word has length 33 [2018-06-22 14:55:15,929 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:55:15,929 INFO ]: With dead ends: 25 [2018-06-22 14:55:15,929 INFO ]: Without dead ends: 25 [2018-06-22 14:55:15,930 INFO ]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2018-06-22 14:55:15,930 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 14:55:15,932 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 14:55:15,932 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 14:55:15,933 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 14:55:15,933 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 33 [2018-06-22 14:55:15,934 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:55:15,934 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 14:55:15,934 INFO ]: Interpolant automaton has 22 states. [2018-06-22 14:55:15,934 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 14:55:15,934 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 14:55:15,934 INFO ]: Found error trace [2018-06-22 14:55:15,935 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:55:15,935 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:55:15,935 INFO ]: Analyzing trace with hash -1494134477, now seen corresponding path program 7 times [2018-06-22 14:55:15,935 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:55:15,935 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:55:15,935 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:55:15,935 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:55:15,935 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:55:15,975 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:55:16,533 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 14:55:16,533 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:55:16,533 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:55:16,539 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:55:16,573 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:55:16,578 INFO ]: Computing forward predicates... [2018-06-22 14:55:16,864 WARN ]: Spent 132.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2018-06-22 14:55:17,032 WARN ]: Spent 135.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2018-06-22 14:55:17,547 WARN ]: Spent 401.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2018-06-22 14:55:20,139 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 14:55:34,529 WARN ]: Spent 3.80 s on a formula simplification. DAG size of input: 465 DAG size of output: 41 [2018-06-22 14:55:37,237 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 14:55:37,257 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:55:37,257 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2018-06-22 14:55:37,257 INFO ]: Interpolant automaton has 31 states [2018-06-22 14:55:37,258 INFO ]: Constructing interpolant automaton starting with 31 interpolants. [2018-06-22 14:55:37,258 INFO ]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2018-06-22 14:55:37,258 INFO ]: Start difference. First operand 25 states and 26 transitions. Second operand 31 states. [2018-06-22 14:55:37,903 WARN ]: Spent 586.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 66 [2018-06-22 14:55:38,158 WARN ]: Spent 209.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 22 [2018-06-22 14:55:38,460 WARN ]: Spent 268.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 36 [2018-06-22 14:55:38,817 WARN ]: Spent 321.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 42 [2018-06-22 14:55:39,240 WARN ]: Spent 390.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 45 [2018-06-22 14:55:39,746 WARN ]: Spent 466.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 47 [2018-06-22 14:55:40,221 WARN ]: Spent 390.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 45 [2018-06-22 14:55:40,933 WARN ]: Spent 665.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 58 [2018-06-22 14:55:40,971 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:55:40,971 INFO ]: Finished difference Result 27 states and 28 transitions. [2018-06-22 14:55:40,972 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 14:55:40,972 INFO ]: Start accepts. Automaton has 31 states. Word has length 37 [2018-06-22 14:55:40,973 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:55:40,973 INFO ]: With dead ends: 27 [2018-06-22 14:55:40,973 INFO ]: Without dead ends: 27 [2018-06-22 14:55:40,974 INFO ]: 0 DeclaredPredicates, 63 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=255, Invalid=1305, Unknown=0, NotChecked=0, Total=1560 [2018-06-22 14:55:40,974 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-22 14:55:40,981 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-06-22 14:55:40,982 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-22 14:55:40,982 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-06-22 14:55:40,982 INFO ]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 37 [2018-06-22 14:55:40,983 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:55:40,983 INFO ]: Abstraction has 27 states and 28 transitions. [2018-06-22 14:55:40,983 INFO ]: Interpolant automaton has 31 states. [2018-06-22 14:55:40,983 INFO ]: Start isEmpty. Operand 27 states and 28 transitions. [2018-06-22 14:55:40,983 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 14:55:40,983 INFO ]: Found error trace [2018-06-22 14:55:40,984 INFO ]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:55:40,984 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:55:40,984 INFO ]: Analyzing trace with hash 1618126293, now seen corresponding path program 8 times [2018-06-22 14:55:40,984 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:55:40,984 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:55:40,984 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:55:40,985 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:55:40,985 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:55:41,070 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:55:41,982 WARN ]: Spent 655.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2018-06-22 14:55:42,366 WARN ]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2018-06-22 14:55:42,856 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 14:55:42,856 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:55:42,856 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:55:42,863 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 14:55:42,911 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:55:42,911 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:55:42,916 INFO ]: Computing forward predicates... [2018-06-22 14:55:43,521 WARN ]: Spent 511.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 44 [2018-06-22 14:55:43,898 WARN ]: Spent 117.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2018-06-22 14:55:44,133 WARN ]: Spent 188.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2018-06-22 14:55:44,381 WARN ]: Spent 205.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2018-06-22 14:55:46,104 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 14:55:46,122 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:55:46,123 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 35 [2018-06-22 14:55:46,123 INFO ]: Interpolant automaton has 35 states [2018-06-22 14:55:46,123 INFO ]: Constructing interpolant automaton starting with 35 interpolants. [2018-06-22 14:55:46,123 INFO ]: CoverageRelationStatistics Valid=107, Invalid=1083, Unknown=0, NotChecked=0, Total=1190 [2018-06-22 14:55:46,124 INFO ]: Start difference. First operand 27 states and 28 transitions. Second operand 35 states. [2018-06-22 14:55:47,338 WARN ]: Spent 1.14 s on a formula simplification. DAG size of input: 153 DAG size of output: 107 [2018-06-22 14:55:47,669 WARN ]: Spent 280.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 24 [2018-06-22 14:55:48,078 WARN ]: Spent 365.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 50 [2018-06-22 14:55:48,563 WARN ]: Spent 437.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 51 [2018-06-22 14:55:49,451 WARN ]: Spent 828.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 66 [2018-06-22 14:55:50,081 WARN ]: Spent 509.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 48 [2018-06-22 14:55:50,828 WARN ]: Spent 705.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 56 [2018-06-22 14:55:51,357 WARN ]: Spent 448.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 51 [2018-06-22 14:55:52,297 WARN ]: Spent 865.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 91 [2018-06-22 14:55:52,341 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:55:52,341 INFO ]: Finished difference Result 29 states and 30 transitions. [2018-06-22 14:55:52,341 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 14:55:52,341 INFO ]: Start accepts. Automaton has 35 states. Word has length 41 [2018-06-22 14:55:52,342 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:55:52,342 INFO ]: With dead ends: 29 [2018-06-22 14:55:52,342 INFO ]: Without dead ends: 29 [2018-06-22 14:55:52,343 INFO ]: 0 DeclaredPredicates, 69 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=296, Invalid=1596, Unknown=0, NotChecked=0, Total=1892 [2018-06-22 14:55:52,343 INFO ]: Start minimizeSevpa. Operand 29 states. [2018-06-22 14:55:52,347 INFO ]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-06-22 14:55:52,347 INFO ]: Start removeUnreachable. Operand 29 states. [2018-06-22 14:55:52,347 INFO ]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-06-22 14:55:52,347 INFO ]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 41 [2018-06-22 14:55:52,347 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:55:52,347 INFO ]: Abstraction has 29 states and 30 transitions. [2018-06-22 14:55:52,347 INFO ]: Interpolant automaton has 35 states. [2018-06-22 14:55:52,347 INFO ]: Start isEmpty. Operand 29 states and 30 transitions. [2018-06-22 14:55:52,348 INFO ]: Finished isEmpty. Found accepting run of length 46 [2018-06-22 14:55:52,348 INFO ]: Found error trace [2018-06-22 14:55:52,348 INFO ]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:55:52,348 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:55:52,349 INFO ]: Analyzing trace with hash 996918775, now seen corresponding path program 9 times [2018-06-22 14:55:52,349 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:55:52,349 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:55:52,349 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:55:52,349 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:55:52,349 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:55:52,456 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:55:52,903 WARN ]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-06-22 14:55:53,684 INFO ]: Checked inductivity of 171 backedges. 2 proven. 124 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 14:55:53,684 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:55:53,684 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:55:53,690 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 14:55:53,738 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-06-22 14:55:53,738 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:55:53,744 INFO ]: Computing forward predicates... [2018-06-22 14:55:54,111 WARN ]: Spent 208.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2018-06-22 14:55:54,509 WARN ]: Spent 135.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2018-06-22 14:55:54,731 WARN ]: Spent 178.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2018-06-22 14:55:54,973 WARN ]: Spent 204.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2018-06-22 14:55:56,705 INFO ]: Checked inductivity of 171 backedges. 1 proven. 125 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 14:55:56,725 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:55:56,725 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 36 [2018-06-22 14:55:56,726 INFO ]: Interpolant automaton has 36 states [2018-06-22 14:55:56,726 INFO ]: Constructing interpolant automaton starting with 36 interpolants. [2018-06-22 14:55:56,726 INFO ]: CoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2018-06-22 14:55:56,726 INFO ]: Start difference. First operand 29 states and 30 transitions. Second operand 36 states. Received shutdown request... [2018-06-22 14:55:57,218 WARN ]: Removed 8 from assertion stack [2018-06-22 14:55:57,218 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:55:57,218 WARN ]: Verification canceled [2018-06-22 14:55:57,221 WARN ]: Timeout [2018-06-22 14:55:57,222 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 02:55:57 BoogieIcfgContainer [2018-06-22 14:55:57,222 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 14:55:57,222 INFO ]: Toolchain (without parser) took 63228.10 ms. Allocated memory was 309.3 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 264.7 MB in the beginning and 455.4 MB in the end (delta: -190.6 MB). Peak memory consumption was 1.0 GB. Max. memory is 3.6 GB. [2018-06-22 14:55:57,223 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 309.3 MB. Free memory is still 274.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 14:55:57,223 INFO ]: ChcToBoogie took 49.46 ms. Allocated memory is still 309.3 MB. Free memory was 263.7 MB in the beginning and 261.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 14:55:57,224 INFO ]: Boogie Preprocessor took 42.44 ms. Allocated memory is still 309.3 MB. Free memory was 261.7 MB in the beginning and 260.7 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-22 14:55:57,224 INFO ]: RCFGBuilder took 279.95 ms. Allocated memory is still 309.3 MB. Free memory was 260.7 MB in the beginning and 252.8 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. [2018-06-22 14:55:57,225 INFO ]: TraceAbstraction took 62840.48 ms. Allocated memory was 309.3 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 252.8 MB in the beginning and 455.4 MB in the end (delta: -202.6 MB). Peak memory consumption was 993.8 MB. Max. memory is 3.6 GB. [2018-06-22 14:55:57,231 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 309.3 MB. Free memory is still 274.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 49.46 ms. Allocated memory is still 309.3 MB. Free memory was 263.7 MB in the beginning and 261.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 42.44 ms. Allocated memory is still 309.3 MB. Free memory was 261.7 MB in the beginning and 260.7 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 279.95 ms. Allocated memory is still 309.3 MB. Free memory was 260.7 MB in the beginning and 252.8 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 62840.48 ms. Allocated memory was 309.3 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 252.8 MB in the beginning and 455.4 MB in the end (delta: -202.6 MB). Peak memory consumption was 993.8 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was constructing difference of abstraction (29states) and interpolant automaton (currently 4 states, 36 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 139. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 62.7s OverallTime, 10 OverallIterations, 10 TraceHistogramMax, 19.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 124 SDtfs, 348 SDslu, 814 SDs, 0 SdLazy, 722 SolverSat, 424 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 426 GetRequests, 203 SyntacticMatches, 7 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 37.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=9, 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, 9 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 41.5s InterpolantComputationTime, 531 NumberOfCodeBlocks, 531 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 512 ConstructedInterpolants, 0 QuantifiedInterpolants, 1127840 SizeOfPredicates, 415 NumberOfNonLiveVariables, 1575 ConjunctsInSsa, 458 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 333/1230 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/dillig07.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_14-55-57-243.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/dillig07.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_14-55-57-243.csv Completed graceful shutdown