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/eldarica-misc/LIA/reve/004b-horn.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 11:09:05,787 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 11:09:05,790 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 11:09:05,804 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 11:09:05,804 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 11:09:05,805 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 11:09:05,809 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 11:09:05,811 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 11:09:05,813 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 11:09:05,814 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 11:09:05,816 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 11:09:05,816 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 11:09:05,817 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 11:09:05,818 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 11:09:05,822 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 11:09:05,823 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 11:09:05,825 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 11:09:05,838 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 11:09:05,840 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 11:09:05,840 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 11:09:05,841 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 11:09:05,844 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 11:09:05,844 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 11:09:05,844 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 11:09:05,845 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 11:09:05,849 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 11:09:05,850 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 11:09:05,850 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 11:09:05,851 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 11:09:05,851 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 11:09:05,856 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 11:09:05,857 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 11:09:05,857 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 11:09:05,859 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 11:09:05,860 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 11:09:05,860 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 11:09:05,880 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 11:09:05,880 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 11:09:05,881 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 11:09:05,881 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 11:09:05,882 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 11:09:05,882 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 11:09:05,882 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 11:09:05,883 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 11:09:05,883 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 11:09:05,883 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 11:09:05,883 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 11:09:05,883 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 11:09:05,884 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 11:09:05,886 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 11:09:05,886 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 11:09:05,887 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 11:09:05,887 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 11:09:05,887 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 11:09:05,887 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 11:09:05,889 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 11:09:05,889 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 11:09:05,936 INFO ]: Repository-Root is: /tmp [2018-06-22 11:09:05,953 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 11:09:05,957 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 11:09:05,959 INFO ]: Initializing SmtParser... [2018-06-22 11:09:05,959 INFO ]: SmtParser initialized [2018-06-22 11:09:05,960 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/eldarica-misc/LIA/reve/004b-horn.smt2 [2018-06-22 11:09:05,961 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 11:09:06,043 INFO ]: Executing SMT file /storage/chc-comp/eldarica-misc/LIA/reve/004b-horn.smt2 unknown [2018-06-22 11:09:06,211 INFO ]: Succesfully executed SMT file /storage/chc-comp/eldarica-misc/LIA/reve/004b-horn.smt2 [2018-06-22 11:09:06,221 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 11:09:06,231 INFO ]: Walking toolchain with 4 elements. [2018-06-22 11:09:06,231 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 11:09:06,231 INFO ]: Initializing ChcToBoogie... [2018-06-22 11:09:06,231 INFO ]: ChcToBoogie initialized [2018-06-22 11:09:06,235 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 11:09:06" (1/1) ... [2018-06-22 11:09:06,282 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:09:06 Unit [2018-06-22 11:09:06,282 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 11:09:06,283 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 11:09:06,283 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 11:09:06,283 INFO ]: Boogie Preprocessor initialized [2018-06-22 11:09:06,305 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:09:06" (1/1) ... [2018-06-22 11:09:06,305 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:09:06" (1/1) ... [2018-06-22 11:09:06,313 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:09:06" (1/1) ... [2018-06-22 11:09:06,313 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:09:06" (1/1) ... [2018-06-22 11:09:06,316 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:09:06" (1/1) ... [2018-06-22 11:09:06,318 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:09:06" (1/1) ... [2018-06-22 11:09:06,319 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:09:06" (1/1) ... [2018-06-22 11:09:06,321 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 11:09:06,321 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 11:09:06,321 INFO ]: Initializing RCFGBuilder... [2018-06-22 11:09:06,321 INFO ]: RCFGBuilder initialized [2018-06-22 11:09:06,326 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:09:06" (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 11:09:06,343 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 11:09:06,343 INFO ]: Found specification of procedure False [2018-06-22 11:09:06,343 INFO ]: Found implementation of procedure False [2018-06-22 11:09:06,343 INFO ]: Specification and implementation of procedure INV1 given in one single declaration [2018-06-22 11:09:06,343 INFO ]: Found specification of procedure INV1 [2018-06-22 11:09:06,343 INFO ]: Found implementation of procedure INV1 [2018-06-22 11:09:06,343 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 11:09:06,343 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 11:09:06,343 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 11:09:06,614 INFO ]: Using library mode [2018-06-22 11:09:06,615 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 11:09:06 BoogieIcfgContainer [2018-06-22 11:09:06,615 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 11:09:06,623 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 11:09:06,623 INFO ]: Initializing TraceAbstraction... [2018-06-22 11:09:06,627 INFO ]: TraceAbstraction initialized [2018-06-22 11:09:06,627 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 11:09:06" (1/3) ... [2018-06-22 11:09:06,628 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55b09e97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 11:09:06, skipping insertion in model container [2018-06-22 11:09:06,628 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:09:06" (2/3) ... [2018-06-22 11:09:06,629 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55b09e97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 11:09:06, skipping insertion in model container [2018-06-22 11:09:06,629 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 11:09:06" (3/3) ... [2018-06-22 11:09:06,636 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 11:09:06,655 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 11:09:06,676 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 11:09:06,753 INFO ]: Using default assertion order modulation [2018-06-22 11:09:06,754 INFO ]: Interprodecural is true [2018-06-22 11:09:06,754 INFO ]: Hoare is false [2018-06-22 11:09:06,754 INFO ]: Compute interpolants for FPandBP [2018-06-22 11:09:06,754 INFO ]: Backedges is TWOTRACK [2018-06-22 11:09:06,754 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 11:09:06,754 INFO ]: Difference is false [2018-06-22 11:09:06,754 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 11:09:06,754 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 11:09:06,780 INFO ]: Start isEmpty. Operand 15 states. [2018-06-22 11:09:06,797 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 11:09:06,797 INFO ]: Found error trace [2018-06-22 11:09:06,798 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:09:06,799 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:09:06,806 INFO ]: Analyzing trace with hash -1122768265, now seen corresponding path program 1 times [2018-06-22 11:09:06,808 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:09:06,808 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:09:06,850 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:09:06,850 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:09:06,850 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:09:06,896 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:09:07,027 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 11:09:07,030 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 11:09:07,030 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 11:09:07,032 INFO ]: Interpolant automaton has 4 states [2018-06-22 11:09:07,047 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 11:09:07,048 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 11:09:07,050 INFO ]: Start difference. First operand 15 states. Second operand 4 states. [2018-06-22 11:09:07,210 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:09:07,210 INFO ]: Finished difference Result 15 states and 22 transitions. [2018-06-22 11:09:07,210 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 11:09:07,211 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 11:09:07,212 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:09:07,221 INFO ]: With dead ends: 15 [2018-06-22 11:09:07,221 INFO ]: Without dead ends: 15 [2018-06-22 11:09:07,223 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 11:09:07,237 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 11:09:07,261 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 11:09:07,262 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 11:09:07,263 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 22 transitions. [2018-06-22 11:09:07,265 INFO ]: Start accepts. Automaton has 15 states and 22 transitions. Word has length 9 [2018-06-22 11:09:07,266 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:09:07,266 INFO ]: Abstraction has 15 states and 22 transitions. [2018-06-22 11:09:07,266 INFO ]: Interpolant automaton has 4 states. [2018-06-22 11:09:07,266 INFO ]: Start isEmpty. Operand 15 states and 22 transitions. [2018-06-22 11:09:07,268 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 11:09:07,268 INFO ]: Found error trace [2018-06-22 11:09:07,268 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:09:07,268 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:09:07,268 INFO ]: Analyzing trace with hash -1863190075, now seen corresponding path program 1 times [2018-06-22 11:09:07,268 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:09:07,268 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:09:07,269 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:09:07,269 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:09:07,269 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:09:07,294 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:09:07,595 WARN ]: Spent 220.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2018-06-22 11:09:07,987 WARN ]: Spent 258.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2018-06-22 11:09:08,018 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 11:09:08,018 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:09:08,018 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 11:09:08,025 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:09:08,052 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:09:08,060 INFO ]: Computing forward predicates... [2018-06-22 11:09:08,268 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 11:09:08,292 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:09:08,292 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 11:09:08,293 INFO ]: Interpolant automaton has 10 states [2018-06-22 11:09:08,293 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 11:09:08,293 INFO ]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-06-22 11:09:08,293 INFO ]: Start difference. First operand 15 states and 22 transitions. Second operand 10 states. [2018-06-22 11:09:08,761 WARN ]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-06-22 11:09:09,129 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:09:09,129 INFO ]: Finished difference Result 29 states and 55 transitions. [2018-06-22 11:09:09,130 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 11:09:09,130 INFO ]: Start accepts. Automaton has 10 states. Word has length 13 [2018-06-22 11:09:09,130 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:09:09,132 INFO ]: With dead ends: 29 [2018-06-22 11:09:09,132 INFO ]: Without dead ends: 29 [2018-06-22 11:09:09,133 INFO ]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2018-06-22 11:09:09,133 INFO ]: Start minimizeSevpa. Operand 29 states. [2018-06-22 11:09:09,142 INFO ]: Finished minimizeSevpa. Reduced states from 29 to 23. [2018-06-22 11:09:09,142 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 11:09:09,144 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 43 transitions. [2018-06-22 11:09:09,144 INFO ]: Start accepts. Automaton has 23 states and 43 transitions. Word has length 13 [2018-06-22 11:09:09,144 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:09:09,144 INFO ]: Abstraction has 23 states and 43 transitions. [2018-06-22 11:09:09,144 INFO ]: Interpolant automaton has 10 states. [2018-06-22 11:09:09,144 INFO ]: Start isEmpty. Operand 23 states and 43 transitions. [2018-06-22 11:09:09,146 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 11:09:09,146 INFO ]: Found error trace [2018-06-22 11:09:09,146 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:09:09,146 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:09:09,146 INFO ]: Analyzing trace with hash -2108440928, now seen corresponding path program 1 times [2018-06-22 11:09:09,146 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:09:09,146 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:09:09,147 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:09:09,147 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:09:09,147 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:09:09,159 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:09:09,257 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 11:09:09,257 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:09:09,257 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 11:09:09,268 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:09:09,292 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:09:09,295 INFO ]: Computing forward predicates... [2018-06-22 11:09:09,399 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 11:09:09,420 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:09:09,421 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 11:09:09,421 INFO ]: Interpolant automaton has 10 states [2018-06-22 11:09:09,421 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 11:09:09,421 INFO ]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-06-22 11:09:09,421 INFO ]: Start difference. First operand 23 states and 43 transitions. Second operand 10 states. [2018-06-22 11:09:09,674 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:09:09,674 INFO ]: Finished difference Result 35 states and 68 transitions. [2018-06-22 11:09:09,675 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 11:09:09,675 INFO ]: Start accepts. Automaton has 10 states. Word has length 13 [2018-06-22 11:09:09,675 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:09:09,677 INFO ]: With dead ends: 35 [2018-06-22 11:09:09,677 INFO ]: Without dead ends: 35 [2018-06-22 11:09:09,677 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2018-06-22 11:09:09,677 INFO ]: Start minimizeSevpa. Operand 35 states. [2018-06-22 11:09:09,686 INFO ]: Finished minimizeSevpa. Reduced states from 35 to 25. [2018-06-22 11:09:09,686 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 11:09:09,687 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 48 transitions. [2018-06-22 11:09:09,687 INFO ]: Start accepts. Automaton has 25 states and 48 transitions. Word has length 13 [2018-06-22 11:09:09,687 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:09:09,687 INFO ]: Abstraction has 25 states and 48 transitions. [2018-06-22 11:09:09,687 INFO ]: Interpolant automaton has 10 states. [2018-06-22 11:09:09,687 INFO ]: Start isEmpty. Operand 25 states and 48 transitions. [2018-06-22 11:09:09,689 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 11:09:09,689 INFO ]: Found error trace [2018-06-22 11:09:09,689 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:09:09,689 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:09:09,689 INFO ]: Analyzing trace with hash 1548248505, now seen corresponding path program 1 times [2018-06-22 11:09:09,689 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:09:09,689 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:09:09,690 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:09:09,690 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:09:09,690 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:09:09,699 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:09:09,748 INFO ]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 11:09:09,748 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 11:09:09,748 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 11:09:09,748 INFO ]: Interpolant automaton has 4 states [2018-06-22 11:09:09,748 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 11:09:09,748 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 11:09:09,748 INFO ]: Start difference. First operand 25 states and 48 transitions. Second operand 4 states. [2018-06-22 11:09:09,860 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:09:09,860 INFO ]: Finished difference Result 31 states and 60 transitions. [2018-06-22 11:09:09,860 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 11:09:09,860 INFO ]: Start accepts. Automaton has 4 states. Word has length 13 [2018-06-22 11:09:09,860 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:09:09,862 INFO ]: With dead ends: 31 [2018-06-22 11:09:09,862 INFO ]: Without dead ends: 31 [2018-06-22 11:09:09,862 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 11:09:09,862 INFO ]: Start minimizeSevpa. Operand 31 states. [2018-06-22 11:09:09,869 INFO ]: Finished minimizeSevpa. Reduced states from 31 to 25. [2018-06-22 11:09:09,869 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 11:09:09,870 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 46 transitions. [2018-06-22 11:09:09,870 INFO ]: Start accepts. Automaton has 25 states and 46 transitions. Word has length 13 [2018-06-22 11:09:09,870 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:09:09,870 INFO ]: Abstraction has 25 states and 46 transitions. [2018-06-22 11:09:09,870 INFO ]: Interpolant automaton has 4 states. [2018-06-22 11:09:09,870 INFO ]: Start isEmpty. Operand 25 states and 46 transitions. [2018-06-22 11:09:09,872 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 11:09:09,872 INFO ]: Found error trace [2018-06-22 11:09:09,872 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:09:09,872 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:09:09,872 INFO ]: Analyzing trace with hash -58935186, now seen corresponding path program 1 times [2018-06-22 11:09:09,872 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:09:09,872 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:09:09,873 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:09:09,873 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:09:09,873 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:09:09,887 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:09:09,923 INFO ]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 11:09:09,923 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 11:09:09,923 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 11:09:09,923 INFO ]: Interpolant automaton has 4 states [2018-06-22 11:09:09,923 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 11:09:09,923 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 11:09:09,923 INFO ]: Start difference. First operand 25 states and 46 transitions. Second operand 4 states. [2018-06-22 11:09:10,059 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:09:10,059 INFO ]: Finished difference Result 35 states and 63 transitions. [2018-06-22 11:09:10,060 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 11:09:10,060 INFO ]: Start accepts. Automaton has 4 states. Word has length 17 [2018-06-22 11:09:10,060 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:09:10,061 INFO ]: With dead ends: 35 [2018-06-22 11:09:10,061 INFO ]: Without dead ends: 35 [2018-06-22 11:09:10,062 INFO ]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-22 11:09:10,062 INFO ]: Start minimizeSevpa. Operand 35 states. [2018-06-22 11:09:10,070 INFO ]: Finished minimizeSevpa. Reduced states from 35 to 29. [2018-06-22 11:09:10,070 INFO ]: Start removeUnreachable. Operand 29 states. [2018-06-22 11:09:10,071 INFO ]: Finished removeUnreachable. Reduced from 29 states to 29 states and 49 transitions. [2018-06-22 11:09:10,071 INFO ]: Start accepts. Automaton has 29 states and 49 transitions. Word has length 17 [2018-06-22 11:09:10,072 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:09:10,072 INFO ]: Abstraction has 29 states and 49 transitions. [2018-06-22 11:09:10,073 INFO ]: Interpolant automaton has 4 states. [2018-06-22 11:09:10,073 INFO ]: Start isEmpty. Operand 29 states and 49 transitions. [2018-06-22 11:09:10,074 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 11:09:10,074 INFO ]: Found error trace [2018-06-22 11:09:10,074 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:09:10,074 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:09:10,074 INFO ]: Analyzing trace with hash 167574023, now seen corresponding path program 1 times [2018-06-22 11:09:10,074 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:09:10,074 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:09:10,075 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:09:10,075 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:09:10,075 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:09:10,095 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:09:10,143 INFO ]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 11:09:10,143 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 11:09:10,143 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 11:09:10,143 INFO ]: Interpolant automaton has 4 states [2018-06-22 11:09:10,143 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 11:09:10,143 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 11:09:10,143 INFO ]: Start difference. First operand 29 states and 49 transitions. Second operand 4 states. [2018-06-22 11:09:10,272 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:09:10,272 INFO ]: Finished difference Result 35 states and 59 transitions. [2018-06-22 11:09:10,272 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 11:09:10,273 INFO ]: Start accepts. Automaton has 4 states. Word has length 17 [2018-06-22 11:09:10,273 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:09:10,274 INFO ]: With dead ends: 35 [2018-06-22 11:09:10,274 INFO ]: Without dead ends: 35 [2018-06-22 11:09:10,274 INFO ]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-22 11:09:10,274 INFO ]: Start minimizeSevpa. Operand 35 states. [2018-06-22 11:09:10,282 INFO ]: Finished minimizeSevpa. Reduced states from 35 to 27. [2018-06-22 11:09:10,282 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-22 11:09:10,283 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 41 transitions. [2018-06-22 11:09:10,283 INFO ]: Start accepts. Automaton has 27 states and 41 transitions. Word has length 17 [2018-06-22 11:09:10,283 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:09:10,283 INFO ]: Abstraction has 27 states and 41 transitions. [2018-06-22 11:09:10,283 INFO ]: Interpolant automaton has 4 states. [2018-06-22 11:09:10,283 INFO ]: Start isEmpty. Operand 27 states and 41 transitions. [2018-06-22 11:09:10,284 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 11:09:10,284 INFO ]: Found error trace [2018-06-22 11:09:10,285 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:09:10,285 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:09:10,286 INFO ]: Analyzing trace with hash 478196361, now seen corresponding path program 2 times [2018-06-22 11:09:10,286 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:09:10,286 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:09:10,287 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:09:10,287 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:09:10,287 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:09:10,299 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:09:10,363 INFO ]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-06-22 11:09:10,363 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:09:10,364 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 11:09:10,378 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 11:09:10,401 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 11:09:10,401 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:09:10,403 INFO ]: Computing forward predicates... [2018-06-22 11:09:10,664 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 11:09:10,689 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:09:10,689 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2018-06-22 11:09:10,690 INFO ]: Interpolant automaton has 12 states [2018-06-22 11:09:10,690 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 11:09:10,690 INFO ]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2018-06-22 11:09:10,690 INFO ]: Start difference. First operand 27 states and 41 transitions. Second operand 12 states. [2018-06-22 11:09:10,964 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:09:10,964 INFO ]: Finished difference Result 51 states and 90 transitions. [2018-06-22 11:09:10,965 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 11:09:10,965 INFO ]: Start accepts. Automaton has 12 states. Word has length 17 [2018-06-22 11:09:10,965 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:09:10,966 INFO ]: With dead ends: 51 [2018-06-22 11:09:10,967 INFO ]: Without dead ends: 51 [2018-06-22 11:09:10,967 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2018-06-22 11:09:10,967 INFO ]: Start minimizeSevpa. Operand 51 states. [2018-06-22 11:09:10,977 INFO ]: Finished minimizeSevpa. Reduced states from 51 to 29. [2018-06-22 11:09:10,977 INFO ]: Start removeUnreachable. Operand 29 states. [2018-06-22 11:09:10,978 INFO ]: Finished removeUnreachable. Reduced from 29 states to 29 states and 46 transitions. [2018-06-22 11:09:10,978 INFO ]: Start accepts. Automaton has 29 states and 46 transitions. Word has length 17 [2018-06-22 11:09:10,978 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:09:10,978 INFO ]: Abstraction has 29 states and 46 transitions. [2018-06-22 11:09:10,978 INFO ]: Interpolant automaton has 12 states. [2018-06-22 11:09:10,978 INFO ]: Start isEmpty. Operand 29 states and 46 transitions. [2018-06-22 11:09:10,979 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 11:09:10,979 INFO ]: Found error trace [2018-06-22 11:09:10,979 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:09:10,979 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:09:10,979 INFO ]: Analyzing trace with hash -1296561645, now seen corresponding path program 2 times [2018-06-22 11:09:10,979 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:09:10,979 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:09:10,980 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:09:10,980 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:09:10,980 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:09:10,990 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:09:11,043 INFO ]: Checked inductivity of 10 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 11:09:11,044 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:09:11,044 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 11:09:11,050 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 11:09:11,065 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 11:09:11,065 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:09:11,067 INFO ]: Computing forward predicates... [2018-06-22 11:09:11,153 INFO ]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 11:09:11,173 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:09:11,173 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2018-06-22 11:09:11,173 INFO ]: Interpolant automaton has 11 states [2018-06-22 11:09:11,174 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-22 11:09:11,174 INFO ]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2018-06-22 11:09:11,174 INFO ]: Start difference. First operand 29 states and 46 transitions. Second operand 11 states. [2018-06-22 11:09:11,607 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:09:11,607 INFO ]: Finished difference Result 46 states and 71 transitions. [2018-06-22 11:09:11,607 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 11:09:11,607 INFO ]: Start accepts. Automaton has 11 states. Word has length 17 [2018-06-22 11:09:11,608 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:09:11,608 INFO ]: With dead ends: 46 [2018-06-22 11:09:11,608 INFO ]: Without dead ends: 34 [2018-06-22 11:09:11,609 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2018-06-22 11:09:11,609 INFO ]: Start minimizeSevpa. Operand 34 states. [2018-06-22 11:09:11,617 INFO ]: Finished minimizeSevpa. Reduced states from 34 to 30. [2018-06-22 11:09:11,617 INFO ]: Start removeUnreachable. Operand 30 states. [2018-06-22 11:09:11,618 INFO ]: Finished removeUnreachable. Reduced from 30 states to 30 states and 47 transitions. [2018-06-22 11:09:11,618 INFO ]: Start accepts. Automaton has 30 states and 47 transitions. Word has length 17 [2018-06-22 11:09:11,618 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:09:11,618 INFO ]: Abstraction has 30 states and 47 transitions. [2018-06-22 11:09:11,618 INFO ]: Interpolant automaton has 11 states. [2018-06-22 11:09:11,618 INFO ]: Start isEmpty. Operand 30 states and 47 transitions. [2018-06-22 11:09:11,627 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 11:09:11,627 INFO ]: Found error trace [2018-06-22 11:09:11,627 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:09:11,627 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:09:11,627 INFO ]: Analyzing trace with hash -759430098, now seen corresponding path program 2 times [2018-06-22 11:09:11,627 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:09:11,627 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:09:11,628 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:09:11,628 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:09:11,628 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:09:11,645 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:09:12,037 INFO ]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 11:09:12,038 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:09:12,038 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 11:09:12,044 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 11:09:12,065 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 11:09:12,065 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:09:12,068 INFO ]: Computing forward predicates... [2018-06-22 11:09:12,269 INFO ]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 11:09:12,289 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:09:12,289 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-06-22 11:09:12,289 INFO ]: Interpolant automaton has 14 states [2018-06-22 11:09:12,289 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-22 11:09:12,289 INFO ]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-06-22 11:09:12,289 INFO ]: Start difference. First operand 30 states and 47 transitions. Second operand 14 states. [2018-06-22 11:09:12,448 WARN ]: Spent 102.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2018-06-22 11:09:13,286 WARN ]: Spent 490.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 25 [2018-06-22 11:09:13,873 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:09:13,873 INFO ]: Finished difference Result 64 states and 98 transitions. [2018-06-22 11:09:13,874 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 11:09:13,874 INFO ]: Start accepts. Automaton has 14 states. Word has length 17 [2018-06-22 11:09:13,874 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:09:13,874 INFO ]: With dead ends: 64 [2018-06-22 11:09:13,874 INFO ]: Without dead ends: 53 [2018-06-22 11:09:13,875 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2018-06-22 11:09:13,875 INFO ]: Start minimizeSevpa. Operand 53 states. [2018-06-22 11:09:13,884 INFO ]: Finished minimizeSevpa. Reduced states from 53 to 37. [2018-06-22 11:09:13,884 INFO ]: Start removeUnreachable. Operand 37 states. [2018-06-22 11:09:13,885 INFO ]: Finished removeUnreachable. Reduced from 37 states to 37 states and 54 transitions. [2018-06-22 11:09:13,885 INFO ]: Start accepts. Automaton has 37 states and 54 transitions. Word has length 17 [2018-06-22 11:09:13,885 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:09:13,885 INFO ]: Abstraction has 37 states and 54 transitions. [2018-06-22 11:09:13,885 INFO ]: Interpolant automaton has 14 states. [2018-06-22 11:09:13,885 INFO ]: Start isEmpty. Operand 37 states and 54 transitions. [2018-06-22 11:09:13,886 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 11:09:13,886 INFO ]: Found error trace [2018-06-22 11:09:13,887 INFO ]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:09:13,887 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:09:13,887 INFO ]: Analyzing trace with hash -843744580, now seen corresponding path program 3 times [2018-06-22 11:09:13,887 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:09:13,887 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:09:13,888 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:09:13,888 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:09:13,888 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:09:13,899 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:09:14,006 INFO ]: Checked inductivity of 19 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-06-22 11:09:14,006 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:09:14,006 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:09:14,014 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 11:09:14,042 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 11:09:14,042 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:09:14,045 INFO ]: Computing forward predicates... [2018-06-22 11:09:14,156 INFO ]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 11:09:14,176 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:09:14,176 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2018-06-22 11:09:14,176 INFO ]: Interpolant automaton has 14 states [2018-06-22 11:09:14,176 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-22 11:09:14,176 INFO ]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-06-22 11:09:14,177 INFO ]: Start difference. First operand 37 states and 54 transitions. Second operand 14 states. [2018-06-22 11:09:14,457 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:09:14,457 INFO ]: Finished difference Result 53 states and 74 transitions. [2018-06-22 11:09:14,457 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-06-22 11:09:14,457 INFO ]: Start accepts. Automaton has 14 states. Word has length 21 [2018-06-22 11:09:14,458 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:09:14,458 INFO ]: With dead ends: 53 [2018-06-22 11:09:14,458 INFO ]: Without dead ends: 44 [2018-06-22 11:09:14,459 INFO ]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2018-06-22 11:09:14,459 INFO ]: Start minimizeSevpa. Operand 44 states. [2018-06-22 11:09:14,463 INFO ]: Finished minimizeSevpa. Reduced states from 44 to 34. [2018-06-22 11:09:14,463 INFO ]: Start removeUnreachable. Operand 34 states. [2018-06-22 11:09:14,464 INFO ]: Finished removeUnreachable. Reduced from 34 states to 34 states and 47 transitions. [2018-06-22 11:09:14,464 INFO ]: Start accepts. Automaton has 34 states and 47 transitions. Word has length 21 [2018-06-22 11:09:14,464 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:09:14,464 INFO ]: Abstraction has 34 states and 47 transitions. [2018-06-22 11:09:14,464 INFO ]: Interpolant automaton has 14 states. [2018-06-22 11:09:14,464 INFO ]: Start isEmpty. Operand 34 states and 47 transitions. [2018-06-22 11:09:14,464 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 11:09:14,464 INFO ]: Found error trace [2018-06-22 11:09:14,465 INFO ]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:09:14,465 INFO ]: === Iteration 11 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:09:14,465 INFO ]: Analyzing trace with hash -1190658473, now seen corresponding path program 4 times [2018-06-22 11:09:14,465 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:09:14,465 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:09:14,465 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:09:14,465 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:09:14,465 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:09:14,477 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:09:14,876 INFO ]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 11:09:14,876 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:09:14,876 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 11:09:14,886 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 11:09:14,902 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 11:09:14,902 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:09:14,905 INFO ]: Computing forward predicates... [2018-06-22 11:09:15,062 INFO ]: Checked inductivity of 19 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 11:09:15,087 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:09:15,087 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2018-06-22 11:09:15,088 INFO ]: Interpolant automaton has 16 states [2018-06-22 11:09:15,088 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 11:09:15,088 INFO ]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2018-06-22 11:09:15,088 INFO ]: Start difference. First operand 34 states and 47 transitions. Second operand 16 states. [2018-06-22 11:09:15,370 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:09:15,370 INFO ]: Finished difference Result 52 states and 72 transitions. [2018-06-22 11:09:15,371 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 11:09:15,371 INFO ]: Start accepts. Automaton has 16 states. Word has length 21 [2018-06-22 11:09:15,371 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:09:15,371 INFO ]: With dead ends: 52 [2018-06-22 11:09:15,371 INFO ]: Without dead ends: 41 [2018-06-22 11:09:15,371 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2018-06-22 11:09:15,372 INFO ]: Start minimizeSevpa. Operand 41 states. [2018-06-22 11:09:15,376 INFO ]: Finished minimizeSevpa. Reduced states from 41 to 27. [2018-06-22 11:09:15,376 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-22 11:09:15,376 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2018-06-22 11:09:15,376 INFO ]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 21 [2018-06-22 11:09:15,376 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:09:15,376 INFO ]: Abstraction has 27 states and 37 transitions. [2018-06-22 11:09:15,377 INFO ]: Interpolant automaton has 16 states. [2018-06-22 11:09:15,377 INFO ]: Start isEmpty. Operand 27 states and 37 transitions. [2018-06-22 11:09:15,377 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 11:09:15,377 INFO ]: Found error trace [2018-06-22 11:09:15,377 INFO ]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:09:15,377 INFO ]: === Iteration 12 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:09:15,377 INFO ]: Analyzing trace with hash -485157493, now seen corresponding path program 1 times [2018-06-22 11:09:15,377 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:09:15,377 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:09:15,378 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:09:15,378 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:09:15,378 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:09:15,386 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:09:15,412 INFO ]: Checked inductivity of 19 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-06-22 11:09:15,412 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:09:15,412 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 11:09:15,418 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:09:15,439 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:09:15,440 INFO ]: Computing forward predicates... [2018-06-22 11:09:15,450 INFO ]: Checked inductivity of 19 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-06-22 11:09:15,475 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:09:15,475 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-06-22 11:09:15,476 INFO ]: Interpolant automaton has 4 states [2018-06-22 11:09:15,476 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 11:09:15,476 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 11:09:15,476 INFO ]: Start difference. First operand 27 states and 37 transitions. Second operand 4 states. [2018-06-22 11:09:15,499 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:09:15,500 INFO ]: Finished difference Result 21 states and 28 transitions. [2018-06-22 11:09:15,500 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 11:09:15,500 INFO ]: Start accepts. Automaton has 4 states. Word has length 21 [2018-06-22 11:09:15,500 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:09:15,500 INFO ]: With dead ends: 21 [2018-06-22 11:09:15,500 INFO ]: Without dead ends: 0 [2018-06-22 11:09:15,500 INFO ]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-22 11:09:15,500 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 11:09:15,500 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 11:09:15,500 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 11:09:15,500 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 11:09:15,500 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2018-06-22 11:09:15,500 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:09:15,500 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 11:09:15,500 INFO ]: Interpolant automaton has 4 states. [2018-06-22 11:09:15,500 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 11:09:15,500 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 11:09:15,506 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 11:09:15 BoogieIcfgContainer [2018-06-22 11:09:15,506 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 11:09:15,507 INFO ]: Toolchain (without parser) took 9285.42 ms. Allocated memory was 310.4 MB in the beginning and 382.2 MB in the end (delta: 71.8 MB). Free memory was 266.9 MB in the beginning and 212.0 MB in the end (delta: 55.0 MB). Peak memory consumption was 126.8 MB. Max. memory is 3.6 GB. [2018-06-22 11:09:15,507 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 310.4 MB. Free memory is still 276.0 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 11:09:15,508 INFO ]: ChcToBoogie took 51.73 ms. Allocated memory is still 310.4 MB. Free memory was 266.9 MB in the beginning and 264.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:09:15,508 INFO ]: Boogie Preprocessor took 37.44 ms. Allocated memory is still 310.4 MB. Free memory was 264.9 MB in the beginning and 263.9 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-22 11:09:15,509 INFO ]: RCFGBuilder took 293.56 ms. Allocated memory is still 310.4 MB. Free memory was 262.9 MB in the beginning and 255.9 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:09:15,509 INFO ]: TraceAbstraction took 8882.67 ms. Allocated memory was 310.4 MB in the beginning and 382.2 MB in the end (delta: 71.8 MB). Free memory was 254.9 MB in the beginning and 212.0 MB in the end (delta: 43.0 MB). Peak memory consumption was 114.8 MB. Max. memory is 3.6 GB. [2018-06-22 11:09:15,512 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 310.4 MB. Free memory is still 276.0 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 51.73 ms. Allocated memory is still 310.4 MB. Free memory was 266.9 MB in the beginning and 264.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 37.44 ms. Allocated memory is still 310.4 MB. Free memory was 264.9 MB in the beginning and 263.9 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 293.56 ms. Allocated memory is still 310.4 MB. Free memory was 262.9 MB in the beginning and 255.9 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 8882.67 ms. Allocated memory was 310.4 MB in the beginning and 382.2 MB in the end (delta: 71.8 MB). Free memory was 254.9 MB in the beginning and 212.0 MB in the end (delta: 43.0 MB). Peak memory consumption was 114.8 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 15 locations, 1 error locations. SAFE Result, 8.7s OverallTime, 12 OverallIterations, 4 TraceHistogramMax, 4.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 217 SDtfs, 84 SDslu, 607 SDs, 0 SdLazy, 1338 SolverSat, 142 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 248 GetRequests, 120 SyntacticMatches, 3 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred 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: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 102 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 336 NumberOfCodeBlocks, 334 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 316 ConstructedInterpolants, 0 QuantifiedInterpolants, 26320 SizeOfPredicates, 56 NumberOfNonLiveVariables, 886 ConjunctsInSsa, 195 ConjunctsInUnsatCore, 20 InterpolantComputations, 4 PerfectInterpolantSequences, 122/205 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/004b-horn.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_11-09-15-522.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/004b-horn.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_11-09-15-522.csv Received shutdown request...