java -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/chccomp2018/chcToBoogie_automizer.epf -i /storage/chc-comp/vmt-chc-benchmarks/ctigar/cars.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 13:13:23,748 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 13:13:23,750 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 13:13:23,762 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 13:13:23,762 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 13:13:23,763 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 13:13:23,764 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 13:13:23,766 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 13:13:23,768 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 13:13:23,769 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 13:13:23,769 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 13:13:23,770 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 13:13:23,771 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 13:13:23,772 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 13:13:23,772 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 13:13:23,773 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 13:13:23,775 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 13:13:23,777 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 13:13:23,778 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 13:13:23,779 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 13:13:23,781 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 13:13:23,783 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 13:13:23,783 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 13:13:23,784 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 13:13:23,785 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 13:13:23,786 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 13:13:23,786 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 13:13:23,787 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 13:13:23,788 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 13:13:23,789 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 13:13:23,789 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 13:13:23,790 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 13:13:23,790 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 13:13:23,791 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 13:13:23,792 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 13:13:23,792 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 13:13:23,806 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 13:13:23,806 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 13:13:23,807 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 13:13:23,807 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 13:13:23,809 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 13:13:23,809 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 13:13:23,809 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 13:13:23,809 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 13:13:23,810 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 13:13:23,810 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 13:13:23,810 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 13:13:23,810 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 13:13:23,811 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 13:13:23,811 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 13:13:23,811 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 13:13:23,811 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 13:13:23,812 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 13:13:23,813 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 13:13:23,813 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 13:13:23,857 INFO ]: Repository-Root is: /tmp [2018-06-18 13:13:23,875 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 13:13:23,883 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 13:13:23,885 INFO ]: Initializing SmtParser... [2018-06-18 13:13:23,885 INFO ]: SmtParser initialized [2018-06-18 13:13:23,886 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/cars.c.smt2 [2018-06-18 13:13:23,887 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 [2018-06-18 13:13:23,984 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/cars.c.smt2 unknown [2018-06-18 13:13:24,475 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/cars.c.smt2 [2018-06-18 13:13:24,480 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 13:13:24,485 INFO ]: Walking toolchain with 4 elements. [2018-06-18 13:13:24,486 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 13:13:24,486 INFO ]: Initializing ChcToBoogie... [2018-06-18 13:13:24,486 INFO ]: ChcToBoogie initialized [2018-06-18 13:13:24,498 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 01:13:24" (1/1) ... [2018-06-18 13:13:24,633 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:13:24 Unit [2018-06-18 13:13:24,633 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 13:13:24,634 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 13:13:24,634 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 13:13:24,634 INFO ]: Boogie Preprocessor initialized [2018-06-18 13:13:24,656 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:13:24" (1/1) ... [2018-06-18 13:13:24,656 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:13:24" (1/1) ... [2018-06-18 13:13:24,673 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:13:24" (1/1) ... [2018-06-18 13:13:24,673 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:13:24" (1/1) ... [2018-06-18 13:13:24,691 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:13:24" (1/1) ... [2018-06-18 13:13:24,692 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:13:24" (1/1) ... [2018-06-18 13:13:24,697 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:13:24" (1/1) ... [2018-06-18 13:13:24,703 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 13:13:24,704 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 13:13:24,704 INFO ]: Initializing RCFGBuilder... [2018-06-18 13:13:24,704 INFO ]: RCFGBuilder initialized [2018-06-18 13:13:24,705 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:13:24" (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 [2018-06-18 13:13:24,720 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 13:13:24,720 INFO ]: Found specification of procedure False [2018-06-18 13:13:24,720 INFO ]: Found implementation of procedure False [2018-06-18 13:13:24,720 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-18 13:13:24,720 INFO ]: Found specification of procedure state [2018-06-18 13:13:24,721 INFO ]: Found implementation of procedure state [2018-06-18 13:13:24,721 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 13:13:24,721 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 13:13:24,721 INFO ]: Found implementation of procedure Ultimate.START [2018-06-18 13:13:25,130 INFO ]: Using library mode [2018-06-18 13:13:25,131 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 01:13:25 BoogieIcfgContainer [2018-06-18 13:13:25,131 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 13:13:25,132 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 13:13:25,132 INFO ]: Initializing TraceAbstraction... [2018-06-18 13:13:25,140 INFO ]: TraceAbstraction initialized [2018-06-18 13:13:25,140 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 01:13:24" (1/3) ... [2018-06-18 13:13:25,141 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@449131ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 01:13:25, skipping insertion in model container [2018-06-18 13:13:25,141 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:13:24" (2/3) ... [2018-06-18 13:13:25,141 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@449131ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 01:13:25, skipping insertion in model container [2018-06-18 13:13:25,141 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 01:13:25" (3/3) ... [2018-06-18 13:13:25,143 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 13:13:25,153 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 13:13:25,164 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 13:13:25,215 INFO ]: Using default assertion order modulation [2018-06-18 13:13:25,216 INFO ]: Interprodecural is true [2018-06-18 13:13:25,216 INFO ]: Hoare is false [2018-06-18 13:13:25,216 INFO ]: Compute interpolants for FPandBP [2018-06-18 13:13:25,216 INFO ]: Backedges is TWOTRACK [2018-06-18 13:13:25,216 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 13:13:25,216 INFO ]: Difference is false [2018-06-18 13:13:25,216 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 13:13:25,216 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 13:13:25,237 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 13:13:25,255 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 13:13:25,255 INFO ]: Found error trace [2018-06-18 13:13:25,257 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:13:25,258 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:13:25,263 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-18 13:13:25,265 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:13:25,266 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:13:25,319 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:13:25,319 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:13:25,319 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:13:25,362 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:13:25,372 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:13:25,561 WARN ]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 4 [2018-06-18 13:13:25,685 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 13:13:25,687 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 13:13:25,688 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 13:13:25,689 INFO ]: Interpolant automaton has 4 states [2018-06-18 13:13:25,703 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 13:13:25,703 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 13:13:25,705 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 13:13:25,807 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:13:25,807 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 13:13:25,809 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 13:13:25,810 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 13:13:25,810 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:13:25,823 INFO ]: With dead ends: 13 [2018-06-18 13:13:25,824 INFO ]: Without dead ends: 13 [2018-06-18 13:13:25,825 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 13:13:25,844 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 13:13:25,878 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 13:13:25,879 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 13:13:25,880 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 13:13:25,881 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 13:13:25,881 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:13:25,881 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 13:13:25,881 INFO ]: Interpolant automaton has 4 states. [2018-06-18 13:13:25,881 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 13:13:25,882 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 13:13:25,882 INFO ]: Found error trace [2018-06-18 13:13:25,882 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:13:25,883 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:13:25,883 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-18 13:13:25,883 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:13:25,883 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:13:25,885 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:13:25,885 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:13:25,885 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:13:26,013 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:13:26,014 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:13:26,393 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 13:13:26,393 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:13:26,393 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 [2018-06-18 13:13:26,410 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:13:26,488 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:13:26,499 INFO ]: Computing forward predicates... [2018-06-18 13:13:27,867 WARN ]: Spent 1.20 s on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2018-06-18 13:13:28,000 WARN ]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-06-18 13:13:28,138 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 13:13:28,171 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:13:28,171 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-18 13:13:28,172 INFO ]: Interpolant automaton has 9 states [2018-06-18 13:13:28,172 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-18 13:13:28,172 INFO ]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-06-18 13:13:28,172 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-18 13:13:28,627 WARN ]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-06-18 13:13:28,992 WARN ]: Spent 256.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2018-06-18 13:13:29,059 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:13:29,059 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 13:13:29,059 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 13:13:29,059 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-18 13:13:29,059 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:13:29,060 INFO ]: With dead ends: 15 [2018-06-18 13:13:29,060 INFO ]: Without dead ends: 15 [2018-06-18 13:13:29,061 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-06-18 13:13:29,061 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 13:13:29,063 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 13:13:29,063 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 13:13:29,064 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 13:13:29,064 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 13:13:29,064 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:13:29,064 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 13:13:29,064 INFO ]: Interpolant automaton has 9 states. [2018-06-18 13:13:29,064 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 13:13:29,065 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 13:13:29,065 INFO ]: Found error trace [2018-06-18 13:13:29,065 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:13:29,065 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:13:29,065 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-18 13:13:29,065 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:13:29,065 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:13:29,066 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:13:29,066 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:13:29,066 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:13:29,157 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:13:29,158 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:13:29,434 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 13:13:29,434 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:13:29,435 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 [2018-06-18 13:13:29,442 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 13:13:29,518 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 13:13:29,518 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:13:29,522 INFO ]: Computing forward predicates... [2018-06-18 13:13:29,732 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 13:13:29,759 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:13:29,759 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-06-18 13:13:29,760 INFO ]: Interpolant automaton has 11 states [2018-06-18 13:13:29,760 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-18 13:13:29,760 INFO ]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2018-06-18 13:13:29,760 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-06-18 13:13:30,162 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:13:30,162 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-18 13:13:30,162 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-18 13:13:30,162 INFO ]: Start accepts. Automaton has 11 states. Word has length 17 [2018-06-18 13:13:30,162 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:13:30,163 INFO ]: With dead ends: 17 [2018-06-18 13:13:30,163 INFO ]: Without dead ends: 17 [2018-06-18 13:13:30,163 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2018-06-18 13:13:30,164 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-18 13:13:30,168 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-18 13:13:30,168 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-18 13:13:30,168 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-18 13:13:30,168 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-18 13:13:30,168 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:13:30,168 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-18 13:13:30,169 INFO ]: Interpolant automaton has 11 states. [2018-06-18 13:13:30,169 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-18 13:13:30,169 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-18 13:13:30,169 INFO ]: Found error trace [2018-06-18 13:13:30,169 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:13:30,169 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:13:30,169 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-18 13:13:30,169 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:13:30,170 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:13:30,170 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:13:30,170 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 13:13:30,170 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:13:30,257 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:13:30,261 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:13:30,809 WARN ]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-06-18 13:13:31,257 WARN ]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-06-18 13:13:31,528 WARN ]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-06-18 13:13:31,593 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 13:13:31,593 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:13:31,593 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) [2018-06-18 13:13:31,611 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 13:13:31,739 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-18 13:13:31,740 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:13:31,745 INFO ]: Computing forward predicates... [2018-06-18 13:13:31,960 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 13:13:31,980 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:13:31,980 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2018-06-18 13:13:31,981 INFO ]: Interpolant automaton has 13 states [2018-06-18 13:13:31,981 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-18 13:13:31,981 INFO ]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2018-06-18 13:13:31,981 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 13 states. [2018-06-18 13:13:32,185 WARN ]: Spent 160.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2018-06-18 13:13:32,393 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:13:32,393 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-18 13:13:32,394 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-18 13:13:32,394 INFO ]: Start accepts. Automaton has 13 states. Word has length 21 [2018-06-18 13:13:32,394 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:13:32,395 INFO ]: With dead ends: 19 [2018-06-18 13:13:32,395 INFO ]: Without dead ends: 19 [2018-06-18 13:13:32,395 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2018-06-18 13:13:32,395 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-18 13:13:32,398 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-18 13:13:32,398 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-18 13:13:32,399 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-18 13:13:32,399 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-18 13:13:32,399 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:13:32,399 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-18 13:13:32,399 INFO ]: Interpolant automaton has 13 states. [2018-06-18 13:13:32,399 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-18 13:13:32,400 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-18 13:13:32,400 INFO ]: Found error trace [2018-06-18 13:13:32,400 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:13:32,400 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:13:32,400 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-18 13:13:32,400 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:13:32,400 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:13:32,401 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:13:32,401 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 13:13:32,401 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:13:32,477 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:13:32,477 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:13:32,837 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-18 13:13:32,837 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:13:32,837 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 [2018-06-18 13:13:32,847 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-18 13:13:32,935 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-18 13:13:32,935 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:13:32,941 INFO ]: Computing forward predicates... [2018-06-18 13:13:33,462 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-18 13:13:33,483 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:13:33,483 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2018-06-18 13:13:33,483 INFO ]: Interpolant automaton has 15 states [2018-06-18 13:13:33,483 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-18 13:13:33,483 INFO ]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2018-06-18 13:13:33,483 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 15 states. [2018-06-18 13:13:33,696 WARN ]: Spent 162.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2018-06-18 13:13:34,103 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:13:34,103 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-18 13:13:34,108 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-18 13:13:34,108 INFO ]: Start accepts. Automaton has 15 states. Word has length 25 [2018-06-18 13:13:34,108 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:13:34,109 INFO ]: With dead ends: 21 [2018-06-18 13:13:34,109 INFO ]: Without dead ends: 21 [2018-06-18 13:13:34,109 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2018-06-18 13:13:34,110 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-18 13:13:34,113 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-18 13:13:34,113 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-18 13:13:34,113 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-18 13:13:34,113 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-18 13:13:34,114 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:13:34,114 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-18 13:13:34,114 INFO ]: Interpolant automaton has 15 states. [2018-06-18 13:13:34,114 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-18 13:13:34,115 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-18 13:13:34,115 INFO ]: Found error trace [2018-06-18 13:13:34,115 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:13:34,115 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:13:34,115 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 5 times [2018-06-18 13:13:34,115 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:13:34,115 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:13:34,116 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:13:34,116 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 13:13:34,116 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:13:34,232 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:13:34,233 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:13:35,252 WARN ]: Spent 735.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-06-18 13:13:35,714 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-18 13:13:35,714 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:13:35,714 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 [2018-06-18 13:13:35,721 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-18 13:13:35,890 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-18 13:13:35,890 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:13:35,897 INFO ]: Computing forward predicates... [2018-06-18 13:13:36,489 WARN ]: Spent 330.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2018-06-18 13:13:36,657 WARN ]: Spent 136.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2018-06-18 13:13:37,244 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-18 13:13:37,280 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:13:37,280 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2018-06-18 13:13:37,280 INFO ]: Interpolant automaton has 17 states [2018-06-18 13:13:37,280 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-18 13:13:37,281 INFO ]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2018-06-18 13:13:37,281 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 17 states. [2018-06-18 13:13:37,594 WARN ]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2018-06-18 13:13:37,848 WARN ]: Spent 107.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2018-06-18 13:13:38,070 WARN ]: Spent 196.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2018-06-18 13:13:38,290 WARN ]: Spent 190.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2018-06-18 13:13:38,451 WARN ]: Spent 136.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2018-06-18 13:13:38,478 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:13:38,478 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-18 13:13:38,478 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-18 13:13:38,478 INFO ]: Start accepts. Automaton has 17 states. Word has length 29 [2018-06-18 13:13:38,478 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:13:38,479 INFO ]: With dead ends: 23 [2018-06-18 13:13:38,479 INFO ]: Without dead ends: 23 [2018-06-18 13:13:38,479 INFO ]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2018-06-18 13:13:38,479 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-18 13:13:38,482 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-18 13:13:38,483 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-18 13:13:38,483 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-18 13:13:38,483 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-18 13:13:38,483 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:13:38,483 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-18 13:13:38,484 INFO ]: Interpolant automaton has 17 states. [2018-06-18 13:13:38,484 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-18 13:13:38,484 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-18 13:13:38,484 INFO ]: Found error trace [2018-06-18 13:13:38,484 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:13:38,485 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:13:38,485 INFO ]: Analyzing trace with hash 800064122, now seen corresponding path program 6 times [2018-06-18 13:13:38,485 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:13:38,485 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:13:38,485 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:13:38,485 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 13:13:38,485 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:13:38,625 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:13:38,626 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:13:39,154 WARN ]: Spent 251.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2018-06-18 13:13:39,688 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-18 13:13:39,688 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:13:39,707 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 [2018-06-18 13:13:39,713 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-18 13:13:39,850 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-18 13:13:39,850 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:13:39,858 INFO ]: Computing forward predicates... [2018-06-18 13:13:42,077 WARN ]: Spent 1.80 s on a formula simplification. DAG size of input: 77 DAG size of output: 36 [2018-06-18 13:13:42,540 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-18 13:13:42,572 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:13:42,572 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2018-06-18 13:13:42,573 INFO ]: Interpolant automaton has 19 states [2018-06-18 13:13:42,573 INFO ]: Constructing interpolant automaton starting with 19 interpolants. [2018-06-18 13:13:42,573 INFO ]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2018-06-18 13:13:42,573 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 19 states. [2018-06-18 13:13:42,925 WARN ]: Spent 280.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2018-06-18 13:13:43,225 WARN ]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 29 [2018-06-18 13:13:43,350 WARN ]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 28 [2018-06-18 13:13:43,484 WARN ]: Spent 112.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 28 [2018-06-18 13:13:43,643 WARN ]: Spent 131.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 32 [2018-06-18 13:13:43,912 WARN ]: Spent 238.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2018-06-18 13:13:44,176 WARN ]: Spent 237.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2018-06-18 13:13:44,217 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:13:44,217 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-18 13:13:44,218 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-18 13:13:44,218 INFO ]: Start accepts. Automaton has 19 states. Word has length 33 [2018-06-18 13:13:44,218 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:13:44,219 INFO ]: With dead ends: 25 [2018-06-18 13:13:44,219 INFO ]: Without dead ends: 25 [2018-06-18 13:13:44,219 INFO ]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2018-06-18 13:13:44,219 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-18 13:13:44,222 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-18 13:13:44,222 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-18 13:13:44,223 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-18 13:13:44,223 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 33 [2018-06-18 13:13:44,223 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:13:44,223 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-18 13:13:44,223 INFO ]: Interpolant automaton has 19 states. [2018-06-18 13:13:44,223 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-18 13:13:44,224 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-18 13:13:44,224 INFO ]: Found error trace [2018-06-18 13:13:44,224 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:13:44,224 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:13:44,225 INFO ]: Analyzing trace with hash -411423458, now seen corresponding path program 7 times [2018-06-18 13:13:44,225 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:13:44,225 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:13:44,225 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:13:44,225 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 13:13:44,225 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:13:44,366 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:13:44,367 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:13:44,851 WARN ]: Spent 154.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2018-06-18 13:13:45,056 WARN ]: Spent 136.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2018-06-18 13:13:45,495 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-18 13:13:45,495 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:13:45,495 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 [2018-06-18 13:13:45,502 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:13:45,633 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:13:45,643 INFO ]: Computing forward predicates... [2018-06-18 13:13:46,261 WARN ]: Spent 450.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 34 [2018-06-18 13:13:46,556 WARN ]: Spent 239.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2018-06-18 13:13:46,704 WARN ]: Spent 102.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2018-06-18 13:13:47,234 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-18 13:13:47,256 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:13:47,256 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 24 [2018-06-18 13:13:47,256 INFO ]: Interpolant automaton has 24 states [2018-06-18 13:13:47,256 INFO ]: Constructing interpolant automaton starting with 24 interpolants. [2018-06-18 13:13:47,257 INFO ]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2018-06-18 13:13:47,257 INFO ]: Start difference. First operand 25 states and 26 transitions. Second operand 24 states. [2018-06-18 13:13:47,924 WARN ]: Spent 600.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2018-06-18 13:13:48,140 WARN ]: Spent 173.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 31 [2018-06-18 13:13:48,365 WARN ]: Spent 195.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 31 [2018-06-18 13:13:48,515 WARN ]: Spent 114.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 27 [2018-06-18 13:13:48,752 WARN ]: Spent 203.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 33 [2018-06-18 13:13:49,235 WARN ]: Spent 398.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 42 [2018-06-18 13:13:49,601 WARN ]: Spent 335.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 46 [2018-06-18 13:13:49,970 WARN ]: Spent 335.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 44 [2018-06-18 13:13:50,007 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:13:50,008 INFO ]: Finished difference Result 27 states and 28 transitions. [2018-06-18 13:13:50,008 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-18 13:13:50,008 INFO ]: Start accepts. Automaton has 24 states. Word has length 37 [2018-06-18 13:13:50,008 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:13:50,009 INFO ]: With dead ends: 27 [2018-06-18 13:13:50,009 INFO ]: Without dead ends: 27 [2018-06-18 13:13:50,010 INFO ]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2018-06-18 13:13:50,010 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-18 13:13:50,013 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-06-18 13:13:50,013 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-18 13:13:50,014 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-06-18 13:13:50,014 INFO ]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 37 [2018-06-18 13:13:50,014 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:13:50,014 INFO ]: Abstraction has 27 states and 28 transitions. [2018-06-18 13:13:50,014 INFO ]: Interpolant automaton has 24 states. [2018-06-18 13:13:50,014 INFO ]: Start isEmpty. Operand 27 states and 28 transitions. [2018-06-18 13:13:50,015 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-18 13:13:50,015 INFO ]: Found error trace [2018-06-18 13:13:50,015 INFO ]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:13:50,015 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:13:50,015 INFO ]: Analyzing trace with hash -544278078, now seen corresponding path program 8 times [2018-06-18 13:13:50,015 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:13:50,015 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:13:50,016 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:13:50,016 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:13:50,016 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:13:50,185 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:13:50,186 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:13:50,561 WARN ]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-18 13:13:51,480 WARN ]: Spent 873.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2018-06-18 13:13:51,640 WARN ]: Spent 153.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2018-06-18 13:13:51,788 WARN ]: Spent 139.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2018-06-18 13:13:51,985 WARN ]: Spent 186.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2018-06-18 13:13:52,528 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-18 13:13:52,528 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:13:52,528 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 [2018-06-18 13:13:52,539 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 13:13:52,785 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 13:13:52,785 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:13:52,798 INFO ]: Computing forward predicates... [2018-06-18 13:13:53,211 WARN ]: Spent 260.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2018-06-18 13:13:53,838 WARN ]: Spent 532.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 36 [2018-06-18 13:13:54,319 WARN ]: Spent 372.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2018-06-18 13:13:54,470 WARN ]: Spent 109.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2018-06-18 13:13:55,129 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-18 13:13:55,160 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:13:55,160 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 27 [2018-06-18 13:13:55,161 INFO ]: Interpolant automaton has 27 states [2018-06-18 13:13:55,161 INFO ]: Constructing interpolant automaton starting with 27 interpolants. [2018-06-18 13:13:55,161 INFO ]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2018-06-18 13:13:55,161 INFO ]: Start difference. First operand 27 states and 28 transitions. Second operand 27 states. [2018-06-18 13:13:55,433 WARN ]: Spent 246.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2018-06-18 13:13:56,702 WARN ]: Spent 1.21 s on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2018-06-18 13:13:57,206 WARN ]: Spent 435.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 29 [2018-06-18 13:13:58,517 WARN ]: Spent 1.24 s on a formula simplification. DAG size of input: 85 DAG size of output: 29 [2018-06-18 13:13:58,751 WARN ]: Spent 191.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 28 [2018-06-18 13:13:59,148 WARN ]: Spent 246.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 31 [2018-06-18 13:13:59,875 WARN ]: Spent 649.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 60 [2018-06-18 13:14:00,604 WARN ]: Spent 629.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 44 [2018-06-18 13:14:01,603 WARN ]: Spent 927.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 46 [2018-06-18 13:14:02,236 WARN ]: Spent 593.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 48 [2018-06-18 13:14:02,293 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:14:02,293 INFO ]: Finished difference Result 29 states and 30 transitions. [2018-06-18 13:14:02,293 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-18 13:14:02,293 INFO ]: Start accepts. Automaton has 27 states. Word has length 41 [2018-06-18 13:14:02,294 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:14:02,294 INFO ]: With dead ends: 29 [2018-06-18 13:14:02,294 INFO ]: Without dead ends: 29 [2018-06-18 13:14:02,295 INFO ]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=234, Invalid=1098, Unknown=0, NotChecked=0, Total=1332 [2018-06-18 13:14:02,295 INFO ]: Start minimizeSevpa. Operand 29 states. [2018-06-18 13:14:02,299 INFO ]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-06-18 13:14:02,299 INFO ]: Start removeUnreachable. Operand 29 states. [2018-06-18 13:14:02,302 INFO ]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-06-18 13:14:02,302 INFO ]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 41 [2018-06-18 13:14:02,303 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:14:02,303 INFO ]: Abstraction has 29 states and 30 transitions. [2018-06-18 13:14:02,303 INFO ]: Interpolant automaton has 27 states. [2018-06-18 13:14:02,303 INFO ]: Start isEmpty. Operand 29 states and 30 transitions. [2018-06-18 13:14:02,310 INFO ]: Finished isEmpty. Found accepting run of length 46 [2018-06-18 13:14:02,310 INFO ]: Found error trace [2018-06-18 13:14:02,310 INFO ]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:14:02,310 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:14:02,310 INFO ]: Analyzing trace with hash 1442343014, now seen corresponding path program 9 times [2018-06-18 13:14:02,310 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:14:02,310 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:14:02,311 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:14:02,311 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 13:14:02,311 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:14:02,456 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:14:02,457 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:14:02,888 WARN ]: Spent 109.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 19 [2018-06-18 13:14:03,113 WARN ]: Spent 124.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2018-06-18 13:14:03,822 INFO ]: Checked inductivity of 171 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-18 13:14:03,822 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:14:03,822 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 [2018-06-18 13:14:03,828 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-18 13:14:04,065 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-06-18 13:14:04,065 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:14:04,083 INFO ]: Computing forward predicates... [2018-06-18 13:14:04,460 WARN ]: Spent 222.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 30 [2018-06-18 13:14:06,425 WARN ]: Spent 1.66 s on a formula simplification. DAG size of input: 109 DAG size of output: 57 [2018-06-18 13:14:07,147 WARN ]: Spent 541.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 41 [2018-06-18 13:14:07,542 WARN ]: Spent 302.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2018-06-18 13:14:08,168 WARN ]: Spent 245.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2018-06-18 13:14:09,527 INFO ]: Checked inductivity of 171 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-18 13:14:09,549 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:14:09,549 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 29 [2018-06-18 13:14:09,550 INFO ]: Interpolant automaton has 29 states [2018-06-18 13:14:09,550 INFO ]: Constructing interpolant automaton starting with 29 interpolants. [2018-06-18 13:14:09,550 INFO ]: CoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2018-06-18 13:14:09,550 INFO ]: Start difference. First operand 29 states and 30 transitions. Second operand 29 states. [2018-06-18 13:14:12,730 WARN ]: Spent 3.08 s on a formula simplification. DAG size of input: 111 DAG size of output: 83 [2018-06-18 13:14:13,333 WARN ]: Spent 531.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 33 [2018-06-18 13:14:14,467 WARN ]: Spent 1.09 s on a formula simplification. DAG size of input: 105 DAG size of output: 33 [2018-06-18 13:14:14,932 WARN ]: Spent 407.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 35 [2018-06-18 13:14:15,593 WARN ]: Spent 612.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 45 [2018-06-18 13:14:16,501 WARN ]: Spent 866.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 53 [2018-06-18 13:14:17,291 WARN ]: Spent 748.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 63 [2018-06-18 13:14:18,092 WARN ]: Spent 758.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 54 [2018-06-18 13:14:19,537 WARN ]: Spent 1.39 s on a formula simplification. DAG size of input: 109 DAG size of output: 71 [2018-06-18 13:14:20,304 WARN ]: Spent 705.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 46 [2018-06-18 13:14:20,347 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:14:20,347 INFO ]: Finished difference Result 31 states and 32 transitions. [2018-06-18 13:14:20,348 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-06-18 13:14:20,348 INFO ]: Start accepts. Automaton has 29 states. Word has length 45 [2018-06-18 13:14:20,348 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:14:20,349 INFO ]: With dead ends: 31 [2018-06-18 13:14:20,349 INFO ]: Without dead ends: 31 [2018-06-18 13:14:20,349 INFO ]: 0 DeclaredPredicates, 77 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=274, Invalid=1286, Unknown=0, NotChecked=0, Total=1560 [2018-06-18 13:14:20,350 INFO ]: Start minimizeSevpa. Operand 31 states. [2018-06-18 13:14:20,353 INFO ]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-06-18 13:14:20,353 INFO ]: Start removeUnreachable. Operand 31 states. [2018-06-18 13:14:20,354 INFO ]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-06-18 13:14:20,354 INFO ]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 45 [2018-06-18 13:14:20,354 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:14:20,354 INFO ]: Abstraction has 31 states and 32 transitions. [2018-06-18 13:14:20,354 INFO ]: Interpolant automaton has 29 states. [2018-06-18 13:14:20,354 INFO ]: Start isEmpty. Operand 31 states and 32 transitions. [2018-06-18 13:14:20,355 INFO ]: Finished isEmpty. Found accepting run of length 50 [2018-06-18 13:14:20,355 INFO ]: Found error trace [2018-06-18 13:14:20,355 INFO ]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:14:20,355 INFO ]: === Iteration 11 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:14:20,355 INFO ]: Analyzing trace with hash 352352522, now seen corresponding path program 10 times [2018-06-18 13:14:20,355 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:14:20,355 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:14:20,356 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:14:20,356 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 13:14:20,356 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:14:20,500 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:14:20,504 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:14:21,368 WARN ]: Spent 141.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2018-06-18 13:14:22,011 INFO ]: Checked inductivity of 210 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-06-18 13:14:22,011 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:14:22,011 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 13:14:22,019 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-18 13:14:22,222 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-18 13:14:22,222 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:14:22,232 INFO ]: Computing forward predicates... [2018-06-18 13:14:22,674 WARN ]: Spent 297.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 35 [2018-06-18 13:14:22,921 WARN ]: Spent 195.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-06-18 13:14:23,544 WARN ]: Spent 547.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 45 [2018-06-18 13:14:23,875 WARN ]: Spent 270.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2018-06-18 13:14:24,923 INFO ]: Checked inductivity of 210 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-06-18 13:14:24,946 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:14:24,946 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 31 [2018-06-18 13:14:24,947 INFO ]: Interpolant automaton has 31 states [2018-06-18 13:14:24,947 INFO ]: Constructing interpolant automaton starting with 31 interpolants. [2018-06-18 13:14:24,947 INFO ]: CoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2018-06-18 13:14:24,947 INFO ]: Start difference. First operand 31 states and 32 transitions. Second operand 31 states. Received shutdown request... [2018-06-18 13:14:25,573 WARN ]: Removed 23 from assertion stack [2018-06-18 13:14:25,574 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-18 13:14:25,574 WARN ]: Verification canceled [2018-06-18 13:14:25,578 WARN ]: Timeout [2018-06-18 13:14:25,579 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.06 01:14:25 BoogieIcfgContainer [2018-06-18 13:14:25,579 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-18 13:14:25,580 INFO ]: Toolchain (without parser) took 61098.92 ms. Allocated memory was 308.8 MB in the beginning and 896.0 MB in the end (delta: 587.2 MB). Free memory was 246.3 MB in the beginning and 422.8 MB in the end (delta: -176.5 MB). Peak memory consumption was 410.7 MB. Max. memory is 3.6 GB. [2018-06-18 13:14:25,580 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 308.8 MB. Free memory is still 274.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 13:14:25,581 INFO ]: ChcToBoogie took 147.42 ms. Allocated memory is still 308.8 MB. Free memory was 246.3 MB in the beginning and 236.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. [2018-06-18 13:14:25,581 INFO ]: Boogie Preprocessor took 69.62 ms. Allocated memory is still 308.8 MB. Free memory was 236.3 MB in the beginning and 235.3 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-18 13:14:25,581 INFO ]: RCFGBuilder took 426.86 ms. Allocated memory is still 308.8 MB. Free memory was 235.3 MB in the beginning and 214.5 MB in the end (delta: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 3.6 GB. [2018-06-18 13:14:25,582 INFO ]: TraceAbstraction took 60446.46 ms. Allocated memory was 308.8 MB in the beginning and 896.0 MB in the end (delta: 587.2 MB). Free memory was 214.5 MB in the beginning and 422.8 MB in the end (delta: -208.3 MB). Peak memory consumption was 378.9 MB. Max. memory is 3.6 GB. [2018-06-18 13:14:25,590 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.08 ms. Allocated memory is still 308.8 MB. Free memory is still 274.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 147.42 ms. Allocated memory is still 308.8 MB. Free memory was 246.3 MB in the beginning and 236.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 69.62 ms. Allocated memory is still 308.8 MB. Free memory was 236.3 MB in the beginning and 235.3 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 426.86 ms. Allocated memory is still 308.8 MB. Free memory was 235.3 MB in the beginning and 214.5 MB in the end (delta: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 3.6 GB. * TraceAbstraction took 60446.46 ms. Allocated memory was 308.8 MB in the beginning and 896.0 MB in the end (delta: 587.2 MB). Free memory was 214.5 MB in the beginning and 422.8 MB in the end (delta: -208.3 MB). Peak memory consumption was 378.9 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 (31states) and interpolant automaton (currently 3 states, 31 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 111. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 60.3s OverallTime, 11 OverallIterations, 11 TraceHistogramMax, 26.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 150 SDtfs, 430 SDslu, 981 SDs, 0 SdLazy, 904 SolverSat, 520 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 518 GetRequests, 262 SyntacticMatches, 15 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 47.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=10, 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, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 2.5s SatisfiabilityAnalysisTime, 30.2s InterpolantComputationTime, 629 NumberOfCodeBlocks, 629 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 608 ConstructedInterpolants, 0 QuantifiedInterpolants, 787332 SizeOfPredicates, 1216 NumberOfNonLiveVariables, 6625 ConjunctsInSsa, 639 ConjunctsInUnsatCore, 21 InterpolantComputations, 1 PerfectInterpolantSequences, 440/1650 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/cars.c.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-18_13-14-25-605.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cars.c.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-18_13-14-25-605.csv Completed graceful shutdown