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/gulwani_cegar2.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 15:06:56,587 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 15:06:56,589 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 15:06:56,602 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 15:06:56,602 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 15:06:56,604 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 15:06:56,605 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 15:06:56,609 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 15:06:56,610 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 15:06:56,611 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 15:06:56,612 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 15:06:56,612 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 15:06:56,613 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 15:06:56,614 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 15:06:56,617 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 15:06:56,618 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 15:06:56,619 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 15:06:56,630 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 15:06:56,631 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 15:06:56,632 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 15:06:56,633 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 15:06:56,636 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 15:06:56,636 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 15:06:56,637 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 15:06:56,637 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 15:06:56,638 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 15:06:56,639 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 15:06:56,639 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 15:06:56,640 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 15:06:56,641 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 15:06:56,641 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 15:06:56,642 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 15:06:56,642 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 15:06:56,643 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 15:06:56,643 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 15:06:56,644 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 15:06:56,662 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 15:06:56,662 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 15:06:56,663 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 15:06:56,663 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 15:06:56,664 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 15:06:56,665 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 15:06:56,665 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 15:06:56,665 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 15:06:56,665 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 15:06:56,665 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 15:06:56,666 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:06:56,666 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 15:06:56,666 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 15:06:56,666 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 15:06:56,666 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 15:06:56,666 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 15:06:56,667 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 15:06:56,667 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 15:06:56,667 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 15:06:56,668 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 15:06:56,668 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 15:06:56,723 INFO ]: Repository-Root is: /tmp [2018-06-22 15:06:56,736 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 15:06:56,740 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 15:06:56,742 INFO ]: Initializing SmtParser... [2018-06-22 15:06:56,742 INFO ]: SmtParser initialized [2018-06-22 15:06:56,743 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/gulwani_cegar2.c.smt2 [2018-06-22 15:06:56,744 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-22 15:06:56,838 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/gulwani_cegar2.c.smt2 unknown [2018-06-22 15:06:57,089 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/gulwani_cegar2.c.smt2 [2018-06-22 15:06:57,093 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 15:06:57,099 INFO ]: Walking toolchain with 4 elements. [2018-06-22 15:06:57,100 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 15:06:57,100 INFO ]: Initializing ChcToBoogie... [2018-06-22 15:06:57,100 INFO ]: ChcToBoogie initialized [2018-06-22 15:06:57,103 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:06:57" (1/1) ... [2018-06-22 15:06:57,148 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:06:57 Unit [2018-06-22 15:06:57,149 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 15:06:57,149 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 15:06:57,149 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 15:06:57,149 INFO ]: Boogie Preprocessor initialized [2018-06-22 15:06:57,174 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:06:57" (1/1) ... [2018-06-22 15:06:57,175 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:06:57" (1/1) ... [2018-06-22 15:06:57,183 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:06:57" (1/1) ... [2018-06-22 15:06:57,183 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:06:57" (1/1) ... [2018-06-22 15:06:57,191 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:06:57" (1/1) ... [2018-06-22 15:06:57,192 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:06:57" (1/1) ... [2018-06-22 15:06:57,194 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:06:57" (1/1) ... [2018-06-22 15:06:57,196 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 15:06:57,196 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 15:06:57,196 INFO ]: Initializing RCFGBuilder... [2018-06-22 15:06:57,196 INFO ]: RCFGBuilder initialized [2018-06-22 15:06:57,197 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:06:57" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-22 15:06:57,219 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 15:06:57,219 INFO ]: Found specification of procedure False [2018-06-22 15:06:57,219 INFO ]: Found implementation of procedure False [2018-06-22 15:06:57,219 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 15:06:57,219 INFO ]: Found specification of procedure state [2018-06-22 15:06:57,219 INFO ]: Found implementation of procedure state [2018-06-22 15:06:57,219 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 15:06:57,219 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 15:06:57,219 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:06:57,469 INFO ]: Using library mode [2018-06-22 15:06:57,470 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:06:57 BoogieIcfgContainer [2018-06-22 15:06:57,470 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 15:06:57,471 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 15:06:57,471 INFO ]: Initializing TraceAbstraction... [2018-06-22 15:06:57,482 INFO ]: TraceAbstraction initialized [2018-06-22 15:06:57,482 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:06:57" (1/3) ... [2018-06-22 15:06:57,483 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e8cf96d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 03:06:57, skipping insertion in model container [2018-06-22 15:06:57,483 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:06:57" (2/3) ... [2018-06-22 15:06:57,483 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e8cf96d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 03:06:57, skipping insertion in model container [2018-06-22 15:06:57,483 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:06:57" (3/3) ... [2018-06-22 15:06:57,485 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 15:06:57,491 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 15:06:57,500 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 15:06:57,540 INFO ]: Using default assertion order modulation [2018-06-22 15:06:57,541 INFO ]: Interprodecural is true [2018-06-22 15:06:57,541 INFO ]: Hoare is false [2018-06-22 15:06:57,541 INFO ]: Compute interpolants for FPandBP [2018-06-22 15:06:57,541 INFO ]: Backedges is TWOTRACK [2018-06-22 15:06:57,541 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 15:06:57,541 INFO ]: Difference is false [2018-06-22 15:06:57,541 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 15:06:57,541 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 15:06:57,554 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 15:06:57,563 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 15:06:57,564 INFO ]: Found error trace [2018-06-22 15:06:57,564 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:06:57,565 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:06:57,568 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 15:06:57,569 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:06:57,570 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:06:57,601 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:06:57,601 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:06:57,601 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:06:57,626 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:06:57,713 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 15:06:57,717 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 15:06:57,717 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 15:06:57,719 INFO ]: Interpolant automaton has 4 states [2018-06-22 15:06:57,734 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 15:06:57,734 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:06:57,736 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 15:06:57,811 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:06:57,811 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 15:06:57,812 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 15:06:57,813 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 15:06:57,813 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:06:57,825 INFO ]: With dead ends: 13 [2018-06-22 15:06:57,825 INFO ]: Without dead ends: 13 [2018-06-22 15:06:57,826 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:06:57,840 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 15:06:57,864 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 15:06:57,865 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 15:06:57,866 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 15:06:57,867 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 15:06:57,867 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:06:57,867 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 15:06:57,867 INFO ]: Interpolant automaton has 4 states. [2018-06-22 15:06:57,867 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 15:06:57,869 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 15:06:57,869 INFO ]: Found error trace [2018-06-22 15:06:57,869 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:06:57,869 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:06:57,869 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 15:06:57,869 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:06:57,869 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:06:57,870 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:06:57,870 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:06:57,870 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:06:57,917 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:06:58,158 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:06:58,158 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:06:58,158 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:06:58,167 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:06:58,211 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:06:58,221 INFO ]: Computing forward predicates... [2018-06-22 15:06:58,646 WARN ]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-22 15:06:58,957 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:06:58,979 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:06:58,979 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-22 15:06:58,980 INFO ]: Interpolant automaton has 8 states [2018-06-22 15:06:58,980 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 15:06:58,980 INFO ]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-06-22 15:06:58,980 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-22 15:06:59,259 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:06:59,259 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 15:06:59,260 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 15:06:59,260 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-22 15:06:59,260 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:06:59,261 INFO ]: With dead ends: 15 [2018-06-22 15:06:59,261 INFO ]: Without dead ends: 15 [2018-06-22 15:06:59,262 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-06-22 15:06:59,262 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 15:06:59,265 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 15:06:59,265 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 15:06:59,265 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 15:06:59,266 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 15:06:59,266 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:06:59,266 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 15:06:59,266 INFO ]: Interpolant automaton has 8 states. [2018-06-22 15:06:59,266 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 15:06:59,266 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 15:06:59,266 INFO ]: Found error trace [2018-06-22 15:06:59,266 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:06:59,266 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:06:59,267 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 15:06:59,267 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:06:59,267 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:06:59,268 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:06:59,268 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:06:59,268 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:06:59,330 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:06:59,772 WARN ]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-06-22 15:06:59,924 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:06:59,924 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:06:59,924 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:06:59,933 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:06:59,973 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:06:59,973 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:06:59,977 INFO ]: Computing forward predicates... [2018-06-22 15:07:00,667 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:07:00,694 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:07:00,694 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-06-22 15:07:00,695 INFO ]: Interpolant automaton has 11 states [2018-06-22 15:07:00,695 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-22 15:07:00,695 INFO ]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-06-22 15:07:00,695 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-06-22 15:07:00,870 WARN ]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-06-22 15:07:01,096 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:07:01,097 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 15:07:01,097 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 15:07:01,097 INFO ]: Start accepts. Automaton has 11 states. Word has length 17 [2018-06-22 15:07:01,097 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:07:01,098 INFO ]: With dead ends: 17 [2018-06-22 15:07:01,098 INFO ]: Without dead ends: 17 [2018-06-22 15:07:01,098 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2018-06-22 15:07:01,098 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 15:07:01,101 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 15:07:01,101 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 15:07:01,102 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 15:07:01,102 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 15:07:01,102 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:07:01,102 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 15:07:01,102 INFO ]: Interpolant automaton has 11 states. [2018-06-22 15:07:01,102 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 15:07:01,103 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 15:07:01,103 INFO ]: Found error trace [2018-06-22 15:07:01,103 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:07:01,103 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:07:01,103 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 15:07:01,103 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:07:01,103 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:07:01,104 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:07:01,104 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:07:01,104 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:07:01,143 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:07:01,370 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:07:01,370 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:07:01,370 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:07:01,381 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 15:07:01,431 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 15:07:01,431 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:07:01,434 INFO ]: Computing forward predicates... [2018-06-22 15:07:02,126 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:07:02,158 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:07:02,158 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2018-06-22 15:07:02,160 INFO ]: Interpolant automaton has 13 states [2018-06-22 15:07:02,160 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 15:07:02,160 INFO ]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2018-06-22 15:07:02,160 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 13 states. [2018-06-22 15:07:02,435 WARN ]: Spent 242.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 23 [2018-06-22 15:07:02,669 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:07:02,669 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 15:07:02,669 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 15:07:02,669 INFO ]: Start accepts. Automaton has 13 states. Word has length 21 [2018-06-22 15:07:02,669 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:07:02,670 INFO ]: With dead ends: 19 [2018-06-22 15:07:02,670 INFO ]: Without dead ends: 19 [2018-06-22 15:07:02,670 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2018-06-22 15:07:02,670 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 15:07:02,673 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 15:07:02,673 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 15:07:02,674 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 15:07:02,674 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 15:07:02,674 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:07:02,674 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 15:07:02,674 INFO ]: Interpolant automaton has 13 states. [2018-06-22 15:07:02,674 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 15:07:02,675 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 15:07:02,675 INFO ]: Found error trace [2018-06-22 15:07:02,675 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:07:02,675 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:07:02,675 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-22 15:07:02,675 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:07:02,675 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:07:02,676 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:07:02,676 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:07:02,676 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:07:02,701 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:07:02,901 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:07:02,901 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:07:02,901 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:07:02,909 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 15:07:02,941 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 15:07:02,941 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:07:02,945 INFO ]: Computing forward predicates... [2018-06-22 15:07:03,355 WARN ]: Spent 278.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 21 [2018-06-22 15:07:03,540 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:07:03,559 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:07:03,559 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2018-06-22 15:07:03,560 INFO ]: Interpolant automaton has 15 states [2018-06-22 15:07:03,560 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-22 15:07:03,560 INFO ]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2018-06-22 15:07:03,560 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 15 states. [2018-06-22 15:07:03,770 WARN ]: Spent 169.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2018-06-22 15:07:04,257 WARN ]: Spent 148.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2018-06-22 15:07:04,311 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:07:04,312 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 15:07:04,313 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 15:07:04,313 INFO ]: Start accepts. Automaton has 15 states. Word has length 25 [2018-06-22 15:07:04,313 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:07:04,313 INFO ]: With dead ends: 21 [2018-06-22 15:07:04,314 INFO ]: Without dead ends: 21 [2018-06-22 15:07:04,314 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2018-06-22 15:07:04,314 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 15:07:04,317 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 15:07:04,317 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 15:07:04,318 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 15:07:04,318 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 15:07:04,318 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:07:04,318 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 15:07:04,318 INFO ]: Interpolant automaton has 15 states. [2018-06-22 15:07:04,318 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 15:07:04,319 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 15:07:04,319 INFO ]: Found error trace [2018-06-22 15:07:04,319 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:07:04,319 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:07:04,319 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 5 times [2018-06-22 15:07:04,319 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:07:04,319 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:07:04,320 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:07:04,320 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:07:04,320 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:07:04,359 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:07:05,180 WARN ]: Spent 596.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2018-06-22 15:07:05,531 WARN ]: Spent 341.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-06-22 15:07:05,998 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:07:05,998 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:07:05,998 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:07:06,005 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 15:07:06,041 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 15:07:06,041 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:07:06,045 INFO ]: Computing forward predicates... [2018-06-22 15:07:06,203 WARN ]: Spent 105.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2018-06-22 15:07:06,416 WARN ]: Spent 133.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2018-06-22 15:07:06,763 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:07:06,782 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:07:06,782 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2018-06-22 15:07:06,783 INFO ]: Interpolant automaton has 23 states [2018-06-22 15:07:06,783 INFO ]: Constructing interpolant automaton starting with 23 interpolants. [2018-06-22 15:07:06,783 INFO ]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2018-06-22 15:07:06,783 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 23 states. [2018-06-22 15:07:07,601 WARN ]: Spent 723.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2018-06-22 15:07:07,963 WARN ]: Spent 200.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 40 [2018-06-22 15:07:08,257 WARN ]: Spent 258.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 47 [2018-06-22 15:07:08,548 WARN ]: Spent 253.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 44 [2018-06-22 15:07:09,201 WARN ]: Spent 618.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 76 [2018-06-22 15:07:09,282 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:07:09,283 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 15:07:09,316 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 15:07:09,316 INFO ]: Start accepts. Automaton has 23 states. Word has length 29 [2018-06-22 15:07:09,317 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:07:09,317 INFO ]: With dead ends: 23 [2018-06-22 15:07:09,317 INFO ]: Without dead ends: 23 [2018-06-22 15:07:09,318 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2018-06-22 15:07:09,318 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 15:07:09,321 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 15:07:09,321 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 15:07:09,322 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 15:07:09,323 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 15:07:09,323 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:07:09,323 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 15:07:09,323 INFO ]: Interpolant automaton has 23 states. [2018-06-22 15:07:09,324 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 15:07:09,324 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 15:07:09,324 INFO ]: Found error trace [2018-06-22 15:07:09,324 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:07:09,324 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:07:09,325 INFO ]: Analyzing trace with hash -1661294575, now seen corresponding path program 6 times [2018-06-22 15:07:09,325 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:07:09,325 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:07:09,325 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:07:09,325 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:07:09,325 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:07:09,367 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:07:09,807 WARN ]: Spent 159.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2018-06-22 15:07:10,372 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:07:10,372 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:07:10,372 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) [2018-06-22 15:07:10,390 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:07:10,460 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-22 15:07:10,460 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:07:10,465 INFO ]: Computing forward predicates... [2018-06-22 15:07:10,773 WARN ]: Spent 257.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 30 [2018-06-22 15:07:10,944 WARN ]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2018-06-22 15:07:12,386 WARN ]: Spent 1.07 s on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2018-06-22 15:07:13,102 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:07:13,132 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:07:13,132 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2018-06-22 15:07:13,132 INFO ]: Interpolant automaton has 27 states [2018-06-22 15:07:13,132 INFO ]: Constructing interpolant automaton starting with 27 interpolants. [2018-06-22 15:07:13,132 INFO ]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2018-06-22 15:07:13,132 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 27 states. [2018-06-22 15:07:13,815 WARN ]: Spent 629.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 79 [2018-06-22 15:07:14,089 WARN ]: Spent 208.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 34 [2018-06-22 15:07:14,335 WARN ]: Spent 214.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 39 [2018-06-22 15:07:15,146 WARN ]: Spent 626.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 49 [2018-06-22 15:07:15,471 WARN ]: Spent 283.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 41 [2018-06-22 15:07:15,821 WARN ]: Spent 314.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 41 [2018-06-22 15:07:16,329 WARN ]: Spent 397.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 64 [2018-06-22 15:07:16,362 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:07:16,362 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 15:07:16,362 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 15:07:16,362 INFO ]: Start accepts. Automaton has 27 states. Word has length 33 [2018-06-22 15:07:16,363 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:07:16,363 INFO ]: With dead ends: 25 [2018-06-22 15:07:16,363 INFO ]: Without dead ends: 25 [2018-06-22 15:07:16,364 INFO ]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2018-06-22 15:07:16,364 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 15:07:16,366 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 15:07:16,366 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 15:07:16,367 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 15:07:16,367 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 33 [2018-06-22 15:07:16,367 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:07:16,367 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 15:07:16,367 INFO ]: Interpolant automaton has 27 states. [2018-06-22 15:07:16,367 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 15:07:16,368 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 15:07:16,368 INFO ]: Found error trace [2018-06-22 15:07:16,368 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:07:16,368 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:07:16,368 INFO ]: Analyzing trace with hash -1494134477, now seen corresponding path program 7 times [2018-06-22 15:07:16,368 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:07:16,368 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:07:16,369 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:07:16,369 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:07:16,369 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:07:16,437 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:07:16,900 WARN ]: Spent 344.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 8 [2018-06-22 15:07:17,567 WARN ]: Spent 618.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2018-06-22 15:07:18,143 WARN ]: Spent 504.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2018-06-22 15:07:18,350 WARN ]: Spent 197.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2018-06-22 15:07:18,979 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:07:18,979 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:07:18,979 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:07:18,985 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:07:19,029 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:07:19,034 INFO ]: Computing forward predicates... [2018-06-22 15:07:19,915 WARN ]: Spent 505.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 40 [2018-06-22 15:07:26,656 WARN ]: Spent 6.23 s on a formula simplification. DAG size of input: 561 DAG size of output: 103 [2018-06-22 15:07:27,305 WARN ]: Spent 469.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 41 [2018-06-22 15:07:27,587 WARN ]: Spent 206.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2018-06-22 15:07:33,621 INFO ]: Checked inductivity of 105 backedges. 1 proven. 76 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:07:33,641 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:07:33,641 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2018-06-22 15:07:33,642 INFO ]: Interpolant automaton has 31 states [2018-06-22 15:07:33,642 INFO ]: Constructing interpolant automaton starting with 31 interpolants. [2018-06-22 15:07:33,642 INFO ]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2018-06-22 15:07:33,642 INFO ]: Start difference. First operand 25 states and 26 transitions. Second operand 31 states. [2018-06-22 15:07:35,118 WARN ]: Spent 1.35 s on a formula simplification. DAG size of input: 221 DAG size of output: 110 [2018-06-22 15:07:35,671 WARN ]: Spent 483.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 36 [2018-06-22 15:07:36,493 WARN ]: Spent 750.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 56 [2018-06-22 15:07:37,052 WARN ]: Spent 485.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 57 [2018-06-22 15:07:37,697 WARN ]: Spent 563.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 38 [2018-06-22 15:07:38,258 WARN ]: Spent 477.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 43 [2018-06-22 15:07:38,855 WARN ]: Spent 521.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 55 [2018-06-22 15:07:40,137 WARN ]: Spent 1.17 s on a formula simplification. DAG size of input: 224 DAG size of output: 105 [2018-06-22 15:07:40,233 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:07:40,233 INFO ]: Finished difference Result 27 states and 28 transitions. [2018-06-22 15:07:40,234 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 15:07:40,234 INFO ]: Start accepts. Automaton has 31 states. Word has length 37 [2018-06-22 15:07:40,234 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:07:40,235 INFO ]: With dead ends: 27 [2018-06-22 15:07:40,235 INFO ]: Without dead ends: 27 [2018-06-22 15:07:40,236 INFO ]: 0 DeclaredPredicates, 63 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=250, Invalid=1310, Unknown=0, NotChecked=0, Total=1560 [2018-06-22 15:07:40,236 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-22 15:07:40,238 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-06-22 15:07:40,239 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-22 15:07:40,239 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-06-22 15:07:40,239 INFO ]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 37 [2018-06-22 15:07:40,239 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:07:40,239 INFO ]: Abstraction has 27 states and 28 transitions. [2018-06-22 15:07:40,239 INFO ]: Interpolant automaton has 31 states. [2018-06-22 15:07:40,239 INFO ]: Start isEmpty. Operand 27 states and 28 transitions. [2018-06-22 15:07:40,241 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 15:07:40,241 INFO ]: Found error trace [2018-06-22 15:07:40,241 INFO ]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:07:40,241 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:07:40,241 INFO ]: Analyzing trace with hash 1618126293, now seen corresponding path program 8 times [2018-06-22 15:07:40,241 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:07:40,241 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:07:40,242 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:07:40,242 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:07:40,242 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:07:40,314 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:07:41,372 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 15:07:41,372 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:07:41,372 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:07:41,378 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:07:41,429 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:07:41,429 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:07:41,435 INFO ]: Computing forward predicates... [2018-06-22 15:07:42,837 WARN ]: Spent 817.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 36 [2018-06-22 15:07:43,099 WARN ]: Spent 202.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 33 [2018-06-22 15:07:43,231 WARN ]: Spent 102.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2018-06-22 15:07:43,363 WARN ]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2018-06-22 15:07:43,811 WARN ]: Spent 207.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2018-06-22 15:07:44,236 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 15:07:44,255 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:07:44,256 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 30 [2018-06-22 15:07:44,256 INFO ]: Interpolant automaton has 30 states [2018-06-22 15:07:44,256 INFO ]: Constructing interpolant automaton starting with 30 interpolants. [2018-06-22 15:07:44,256 INFO ]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2018-06-22 15:07:44,256 INFO ]: Start difference. First operand 27 states and 28 transitions. Second operand 30 states. [2018-06-22 15:07:44,926 WARN ]: Spent 624.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 80 [2018-06-22 15:07:45,201 WARN ]: Spent 236.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 29 [2018-06-22 15:07:45,571 WARN ]: Spent 341.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 35 [2018-06-22 15:07:45,882 WARN ]: Spent 247.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 41 [2018-06-22 15:07:46,244 WARN ]: Spent 330.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 37 [2018-06-22 15:07:46,714 WARN ]: Spent 421.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 40 [2018-06-22 15:07:47,052 WARN ]: Spent 301.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 43 [2018-06-22 15:07:47,460 WARN ]: Spent 376.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 46 [2018-06-22 15:07:48,002 WARN ]: Spent 504.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 70 [2018-06-22 15:07:48,047 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:07:48,047 INFO ]: Finished difference Result 29 states and 30 transitions. [2018-06-22 15:07:48,050 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 15:07:48,050 INFO ]: Start accepts. Automaton has 30 states. Word has length 41 [2018-06-22 15:07:48,050 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:07:48,051 INFO ]: With dead ends: 29 [2018-06-22 15:07:48,051 INFO ]: Without dead ends: 29 [2018-06-22 15:07:48,052 INFO ]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=288, Invalid=1194, Unknown=0, NotChecked=0, Total=1482 [2018-06-22 15:07:48,052 INFO ]: Start minimizeSevpa. Operand 29 states. [2018-06-22 15:07:48,056 INFO ]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-06-22 15:07:48,056 INFO ]: Start removeUnreachable. Operand 29 states. [2018-06-22 15:07:48,056 INFO ]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-06-22 15:07:48,056 INFO ]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 41 [2018-06-22 15:07:48,056 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:07:48,056 INFO ]: Abstraction has 29 states and 30 transitions. [2018-06-22 15:07:48,057 INFO ]: Interpolant automaton has 30 states. [2018-06-22 15:07:48,057 INFO ]: Start isEmpty. Operand 29 states and 30 transitions. [2018-06-22 15:07:48,057 INFO ]: Finished isEmpty. Found accepting run of length 46 [2018-06-22 15:07:48,057 INFO ]: Found error trace [2018-06-22 15:07:48,058 INFO ]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:07:48,058 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:07:48,058 INFO ]: Analyzing trace with hash 996918775, now seen corresponding path program 9 times [2018-06-22 15:07:48,058 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:07:48,058 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:07:48,058 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:07:48,058 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:07:48,058 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:07:48,155 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:07:48,658 WARN ]: Spent 338.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 8 [2018-06-22 15:07:49,437 WARN ]: Spent 723.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2018-06-22 15:07:49,637 WARN ]: Spent 193.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2018-06-22 15:07:49,768 WARN ]: Spent 123.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2018-06-22 15:07:50,065 WARN ]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2018-06-22 15:07:50,737 INFO ]: Checked inductivity of 171 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 15:07:50,737 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:07:50,737 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:07:50,745 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 15:07:50,821 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-06-22 15:07:50,821 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:07:50,828 INFO ]: Computing forward predicates... [2018-06-22 15:07:52,674 WARN ]: Spent 1.66 s on a formula simplification. DAG size of input: 332 DAG size of output: 58 [2018-06-22 15:07:53,240 WARN ]: Spent 435.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 37 [2018-06-22 15:07:53,589 WARN ]: Spent 285.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 33 [2018-06-22 15:07:53,805 WARN ]: Spent 174.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2018-06-22 15:07:54,004 WARN ]: Spent 159.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2018-06-22 15:07:54,164 WARN ]: Spent 115.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2018-06-22 15:07:56,929 INFO ]: Checked inductivity of 171 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 15:07:56,948 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:07:56,948 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 39 [2018-06-22 15:07:56,949 INFO ]: Interpolant automaton has 39 states [2018-06-22 15:07:56,949 INFO ]: Constructing interpolant automaton starting with 39 interpolants. [2018-06-22 15:07:56,950 INFO ]: CoverageRelationStatistics Valid=148, Invalid=1334, Unknown=0, NotChecked=0, Total=1482 [2018-06-22 15:07:56,950 INFO ]: Start difference. First operand 29 states and 30 transitions. Second operand 39 states. Received shutdown request... [2018-06-22 15:07:57,612 WARN ]: Removed 5 from assertion stack [2018-06-22 15:07:57,612 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 15:07:57,612 WARN ]: Verification canceled [2018-06-22 15:07:57,615 WARN ]: Timeout [2018-06-22 15:07:57,615 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 03:07:57 BoogieIcfgContainer [2018-06-22 15:07:57,615 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 15:07:57,616 INFO ]: Toolchain (without parser) took 60522.44 ms. Allocated memory was 304.6 MB in the beginning and 799.5 MB in the end (delta: 494.9 MB). Free memory was 258.0 MB in the beginning and 386.5 MB in the end (delta: -128.5 MB). Peak memory consumption was 366.4 MB. Max. memory is 3.6 GB. [2018-06-22 15:07:57,616 INFO ]: SmtParser took 0.06 ms. Allocated memory is still 304.6 MB. Free memory is still 270.1 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 15:07:57,617 INFO ]: ChcToBoogie took 49.29 ms. Allocated memory is still 304.6 MB. Free memory was 258.0 MB in the beginning and 256.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:07:57,617 INFO ]: Boogie Preprocessor took 46.40 ms. Allocated memory is still 304.6 MB. Free memory was 256.0 MB in the beginning and 254.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:07:57,617 INFO ]: RCFGBuilder took 273.78 ms. Allocated memory is still 304.6 MB. Free memory was 254.0 MB in the beginning and 245.9 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 3.6 GB. [2018-06-22 15:07:57,618 INFO ]: TraceAbstraction took 60143.88 ms. Allocated memory was 304.6 MB in the beginning and 799.5 MB in the end (delta: 494.9 MB). Free memory was 244.9 MB in the beginning and 386.5 MB in the end (delta: -141.6 MB). Peak memory consumption was 353.4 MB. Max. memory is 3.6 GB. [2018-06-22 15:07:57,620 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.06 ms. Allocated memory is still 304.6 MB. Free memory is still 270.1 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 49.29 ms. Allocated memory is still 304.6 MB. Free memory was 258.0 MB in the beginning and 256.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 46.40 ms. Allocated memory is still 304.6 MB. Free memory was 256.0 MB in the beginning and 254.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 273.78 ms. Allocated memory is still 304.6 MB. Free memory was 254.0 MB in the beginning and 245.9 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 3.6 GB. * TraceAbstraction took 60143.88 ms. Allocated memory was 304.6 MB in the beginning and 799.5 MB in the end (delta: 494.9 MB). Free memory was 244.9 MB in the beginning and 386.5 MB in the end (delta: -141.6 MB). Peak memory consumption was 353.4 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, 39 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 215. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 60.0s OverallTime, 10 OverallIterations, 10 TraceHistogramMax, 18.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 124 SDtfs, 398 SDslu, 862 SDs, 0 SdLazy, 748 SolverSat, 489 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 431 GetRequests, 195 SyntacticMatches, 6 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 44.8s 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, 39.7s InterpolantComputationTime, 531 NumberOfCodeBlocks, 531 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 512 ConstructedInterpolants, 0 QuantifiedInterpolants, 1764792404 SizeOfPredicates, 534 NumberOfNonLiveVariables, 1971 ConjunctsInSsa, 459 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 331/1230 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/gulwani_cegar2.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_15-07-57-629.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/gulwani_cegar2.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_15-07-57-629.csv Completed graceful shutdown