java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/ctigar/pldi08.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 05:48:31,045 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 05:48:31,056 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 05:48:31,069 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 05:48:31,069 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 05:48:31,070 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 05:48:31,071 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 05:48:31,076 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 05:48:31,079 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 05:48:31,079 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 05:48:31,080 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 05:48:31,081 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 05:48:31,083 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 05:48:31,087 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 05:48:31,088 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 05:48:31,089 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 05:48:31,100 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 05:48:31,102 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 05:48:31,104 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 05:48:31,105 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 05:48:31,106 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 05:48:31,108 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 05:48:31,108 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 05:48:31,109 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 05:48:31,114 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 05:48:31,115 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 05:48:31,116 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 05:48:31,117 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 05:48:31,121 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 05:48:31,122 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 05:48:31,122 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 05:48:31,123 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 05:48:31,123 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 05:48:31,124 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 05:48:31,124 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 05:48:31,125 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 05:48:31,146 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 05:48:31,147 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 05:48:31,147 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 05:48:31,147 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 05:48:31,148 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 05:48:31,148 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 05:48:31,149 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 05:48:31,149 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 05:48:31,149 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:48:31,149 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 05:48:31,149 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 05:48:31,149 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 05:48:31,150 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 05:48:31,150 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 05:48:31,150 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 05:48:31,150 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 05:48:31,150 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 05:48:31,154 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 05:48:31,154 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 05:48:31,200 INFO ]: Repository-Root is: /tmp [2018-06-22 05:48:31,216 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 05:48:31,221 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 05:48:31,223 INFO ]: Initializing SmtParser... [2018-06-22 05:48:31,223 INFO ]: SmtParser initialized [2018-06-22 05:48:31,224 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/pldi08.c.smt2 [2018-06-22 05:48:31,225 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-22 05:48:31,322 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/pldi08.c.smt2 unknown [2018-06-22 05:48:31,496 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/pldi08.c.smt2 [2018-06-22 05:48:31,500 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 05:48:31,506 INFO ]: Walking toolchain with 4 elements. [2018-06-22 05:48:31,506 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 05:48:31,506 INFO ]: Initializing ChcToBoogie... [2018-06-22 05:48:31,507 INFO ]: ChcToBoogie initialized [2018-06-22 05:48:31,510 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:48:31" (1/1) ... [2018-06-22 05:48:31,565 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:48:31 Unit [2018-06-22 05:48:31,565 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 05:48:31,566 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 05:48:31,566 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 05:48:31,566 INFO ]: Boogie Preprocessor initialized [2018-06-22 05:48:31,585 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:48:31" (1/1) ... [2018-06-22 05:48:31,585 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:48:31" (1/1) ... [2018-06-22 05:48:31,592 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:48:31" (1/1) ... [2018-06-22 05:48:31,592 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:48:31" (1/1) ... [2018-06-22 05:48:31,595 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:48:31" (1/1) ... [2018-06-22 05:48:31,596 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:48:31" (1/1) ... [2018-06-22 05:48:31,597 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:48:31" (1/1) ... [2018-06-22 05:48:31,609 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 05:48:31,610 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 05:48:31,610 INFO ]: Initializing RCFGBuilder... [2018-06-22 05:48:31,610 INFO ]: RCFGBuilder initialized [2018-06-22 05:48:31,610 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:48:31" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-22 05:48:31,623 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 05:48:31,623 INFO ]: Found specification of procedure gotoProc [2018-06-22 05:48:31,623 INFO ]: Found implementation of procedure gotoProc [2018-06-22 05:48:31,623 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 05:48:31,623 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 05:48:31,623 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:48:31,753 INFO ]: Using library mode [2018-06-22 05:48:31,754 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:48:31 BoogieIcfgContainer [2018-06-22 05:48:31,754 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 05:48:31,755 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 05:48:31,755 INFO ]: Initializing TraceAbstraction... [2018-06-22 05:48:31,759 INFO ]: TraceAbstraction initialized [2018-06-22 05:48:31,759 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:48:31" (1/3) ... [2018-06-22 05:48:31,760 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b6e6156 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:48:31, skipping insertion in model container [2018-06-22 05:48:31,760 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:48:31" (2/3) ... [2018-06-22 05:48:31,760 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b6e6156 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:48:31, skipping insertion in model container [2018-06-22 05:48:31,761 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:48:31" (3/3) ... [2018-06-22 05:48:31,763 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 05:48:31,773 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 05:48:31,784 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 05:48:31,843 INFO ]: Using default assertion order modulation [2018-06-22 05:48:31,843 INFO ]: Interprodecural is true [2018-06-22 05:48:31,843 INFO ]: Hoare is false [2018-06-22 05:48:31,843 INFO ]: Compute interpolants for FPandBP [2018-06-22 05:48:31,843 INFO ]: Backedges is TWOTRACK [2018-06-22 05:48:31,844 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 05:48:31,844 INFO ]: Difference is false [2018-06-22 05:48:31,844 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 05:48:31,844 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 05:48:31,862 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 05:48:31,879 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 05:48:31,879 INFO ]: Found error trace [2018-06-22 05:48:31,880 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:48:31,881 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:48:31,886 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-22 05:48:31,888 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:48:31,889 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:48:31,928 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:48:31,928 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:48:31,928 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:48:31,964 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:48:32,012 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:48:32,015 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 05:48:32,016 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 05:48:32,018 INFO ]: Interpolant automaton has 3 states [2018-06-22 05:48:32,033 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 05:48:32,034 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:48:32,045 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 05:48:32,117 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:48:32,117 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 05:48:32,118 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 05:48:32,119 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 05:48:32,119 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:48:32,130 INFO ]: With dead ends: 9 [2018-06-22 05:48:32,130 INFO ]: Without dead ends: 9 [2018-06-22 05:48:32,132 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:48:32,158 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 05:48:32,175 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 05:48:32,176 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 05:48:32,177 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 05:48:32,178 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 05:48:32,178 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:48:32,178 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 05:48:32,178 INFO ]: Interpolant automaton has 3 states. [2018-06-22 05:48:32,178 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 05:48:32,178 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 05:48:32,179 INFO ]: Found error trace [2018-06-22 05:48:32,179 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:48:32,179 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:48:32,179 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-22 05:48:32,179 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:48:32,179 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:48:32,180 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:48:32,180 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:48:32,180 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:48:32,204 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:48:32,361 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:48:32,361 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:48:32,361 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:48:32,368 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:48:32,404 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:48:32,411 INFO ]: Computing forward predicates... [2018-06-22 05:48:32,566 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:48:32,587 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:48:32,587 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 05:48:32,588 INFO ]: Interpolant automaton has 5 states [2018-06-22 05:48:32,588 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 05:48:32,588 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-22 05:48:32,588 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 05:48:32,686 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:48:32,686 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 05:48:32,686 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 05:48:32,686 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 05:48:32,686 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:48:32,686 INFO ]: With dead ends: 10 [2018-06-22 05:48:32,686 INFO ]: Without dead ends: 10 [2018-06-22 05:48:32,687 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:48:32,687 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 05:48:32,688 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 05:48:32,688 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 05:48:32,689 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 05:48:32,689 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 05:48:32,689 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:48:32,689 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 05:48:32,689 INFO ]: Interpolant automaton has 5 states. [2018-06-22 05:48:32,689 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 05:48:32,689 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 05:48:32,689 INFO ]: Found error trace [2018-06-22 05:48:32,689 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:48:32,689 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:48:32,690 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-22 05:48:32,690 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:48:32,690 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:48:32,691 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:48:32,691 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:48:32,691 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:48:32,736 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:48:32,904 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:48:32,904 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:48:32,904 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) [2018-06-22 05:48:32,921 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:48:32,983 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:48:32,983 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:48:32,985 INFO ]: Computing forward predicates... [2018-06-22 05:48:34,211 WARN ]: Spent 382.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 6 [2018-06-22 05:48:34,443 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:48:34,467 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:48:34,467 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-06-22 05:48:34,468 INFO ]: Interpolant automaton has 7 states [2018-06-22 05:48:34,468 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 05:48:34,468 INFO ]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-06-22 05:48:34,468 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 7 states. [2018-06-22 05:48:34,844 WARN ]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 05:48:34,858 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:48:34,858 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 05:48:34,860 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 05:48:34,860 INFO ]: Start accepts. Automaton has 7 states. Word has length 9 [2018-06-22 05:48:34,860 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:48:34,860 INFO ]: With dead ends: 11 [2018-06-22 05:48:34,860 INFO ]: Without dead ends: 11 [2018-06-22 05:48:34,861 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-06-22 05:48:34,861 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 05:48:34,862 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 05:48:34,862 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 05:48:34,862 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 05:48:34,862 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-22 05:48:34,863 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:48:34,863 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 05:48:34,863 INFO ]: Interpolant automaton has 7 states. [2018-06-22 05:48:34,863 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 05:48:34,863 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 05:48:34,863 INFO ]: Found error trace [2018-06-22 05:48:34,863 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:48:34,863 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:48:34,863 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 3 times [2018-06-22 05:48:34,863 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:48:34,863 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:48:34,864 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:48:34,864 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:48:34,864 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:48:34,894 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:48:35,053 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:48:35,053 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:48:35,053 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:48:35,061 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 05:48:35,121 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 05:48:35,121 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:48:35,124 INFO ]: Computing forward predicates... [2018-06-22 05:48:35,396 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:48:35,418 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:48:35,418 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-22 05:48:35,419 INFO ]: Interpolant automaton has 7 states [2018-06-22 05:48:35,419 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 05:48:35,419 INFO ]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-06-22 05:48:35,419 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-06-22 05:48:35,626 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:48:35,626 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 05:48:35,626 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 05:48:35,626 INFO ]: Start accepts. Automaton has 7 states. Word has length 10 [2018-06-22 05:48:35,626 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:48:35,626 INFO ]: With dead ends: 12 [2018-06-22 05:48:35,626 INFO ]: Without dead ends: 12 [2018-06-22 05:48:35,627 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-06-22 05:48:35,627 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 05:48:35,628 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 05:48:35,628 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 05:48:35,629 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 05:48:35,629 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-22 05:48:35,629 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:48:35,629 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 05:48:35,629 INFO ]: Interpolant automaton has 7 states. [2018-06-22 05:48:35,629 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 05:48:35,629 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 05:48:35,629 INFO ]: Found error trace [2018-06-22 05:48:35,629 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:48:35,629 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:48:35,630 INFO ]: Analyzing trace with hash 201204236, now seen corresponding path program 4 times [2018-06-22 05:48:35,630 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:48:35,630 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:48:35,630 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:48:35,630 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:48:35,630 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:48:35,655 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:48:35,764 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:48:35,764 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:48:35,764 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:48:35,770 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 05:48:35,803 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 05:48:35,804 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:48:35,806 INFO ]: Computing forward predicates... [2018-06-22 05:48:36,266 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:48:36,288 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:48:36,288 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-06-22 05:48:36,288 INFO ]: Interpolant automaton has 8 states [2018-06-22 05:48:36,288 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 05:48:36,288 INFO ]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-06-22 05:48:36,288 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 8 states. [2018-06-22 05:48:36,432 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:48:36,432 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 05:48:36,432 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 05:48:36,432 INFO ]: Start accepts. Automaton has 8 states. Word has length 11 [2018-06-22 05:48:36,432 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:48:36,433 INFO ]: With dead ends: 13 [2018-06-22 05:48:36,433 INFO ]: Without dead ends: 13 [2018-06-22 05:48:36,433 INFO ]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2018-06-22 05:48:36,433 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 05:48:36,435 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 05:48:36,435 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 05:48:36,435 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 05:48:36,435 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-22 05:48:36,435 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:48:36,435 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 05:48:36,435 INFO ]: Interpolant automaton has 8 states. [2018-06-22 05:48:36,435 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 05:48:36,436 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 05:48:36,436 INFO ]: Found error trace [2018-06-22 05:48:36,436 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:48:36,436 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:48:36,436 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 5 times [2018-06-22 05:48:36,436 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:48:36,436 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:48:36,437 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:48:36,437 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:48:36,437 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:48:36,478 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:48:36,663 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:48:36,663 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:48:36,663 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:48:36,672 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 05:48:36,746 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-22 05:48:36,746 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:48:36,749 INFO ]: Computing forward predicates... [2018-06-22 05:48:37,871 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:48:37,904 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:48:37,904 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-06-22 05:48:37,904 INFO ]: Interpolant automaton has 9 states [2018-06-22 05:48:37,904 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 05:48:37,904 INFO ]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-06-22 05:48:37,905 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 9 states. [2018-06-22 05:48:39,141 WARN ]: Spent 959.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2018-06-22 05:48:39,697 WARN ]: Spent 452.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2018-06-22 05:48:39,771 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:48:39,771 INFO ]: Finished difference Result 14 states and 14 transitions. [2018-06-22 05:48:39,771 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 05:48:39,771 INFO ]: Start accepts. Automaton has 9 states. Word has length 12 [2018-06-22 05:48:39,771 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:48:39,772 INFO ]: With dead ends: 14 [2018-06-22 05:48:39,772 INFO ]: Without dead ends: 14 [2018-06-22 05:48:39,772 INFO ]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2018-06-22 05:48:39,772 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-22 05:48:39,773 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-06-22 05:48:39,774 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-22 05:48:39,774 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-06-22 05:48:39,774 INFO ]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-06-22 05:48:39,774 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:48:39,774 INFO ]: Abstraction has 14 states and 14 transitions. [2018-06-22 05:48:39,774 INFO ]: Interpolant automaton has 9 states. [2018-06-22 05:48:39,774 INFO ]: Start isEmpty. Operand 14 states and 14 transitions. [2018-06-22 05:48:39,774 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 05:48:39,774 INFO ]: Found error trace [2018-06-22 05:48:39,775 INFO ]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:48:39,775 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:48:39,775 INFO ]: Analyzing trace with hash 23503628, now seen corresponding path program 6 times [2018-06-22 05:48:39,775 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:48:39,775 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:48:39,776 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:48:39,776 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:48:39,776 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:48:39,803 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:48:40,024 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:48:40,024 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:48:40,024 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:48:40,031 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 05:48:40,057 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-06-22 05:48:40,057 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:48:40,060 INFO ]: Computing forward predicates... [2018-06-22 05:48:41,387 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:48:41,407 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:48:41,407 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-06-22 05:48:41,407 INFO ]: Interpolant automaton has 10 states [2018-06-22 05:48:41,407 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 05:48:41,408 INFO ]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2018-06-22 05:48:41,408 INFO ]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2018-06-22 05:48:41,624 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:48:41,624 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-22 05:48:41,624 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 05:48:41,624 INFO ]: Start accepts. Automaton has 10 states. Word has length 13 [2018-06-22 05:48:41,624 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:48:41,624 INFO ]: With dead ends: 15 [2018-06-22 05:48:41,624 INFO ]: Without dead ends: 15 [2018-06-22 05:48:41,625 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2018-06-22 05:48:41,625 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 05:48:41,628 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 05:48:41,628 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 05:48:41,628 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-06-22 05:48:41,628 INFO ]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-06-22 05:48:41,628 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:48:41,628 INFO ]: Abstraction has 15 states and 15 transitions. [2018-06-22 05:48:41,628 INFO ]: Interpolant automaton has 10 states. [2018-06-22 05:48:41,628 INFO ]: Start isEmpty. Operand 15 states and 15 transitions. [2018-06-22 05:48:41,629 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-22 05:48:41,629 INFO ]: Found error trace [2018-06-22 05:48:41,629 INFO ]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:48:41,629 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:48:41,629 INFO ]: Analyzing trace with hash 726730004, now seen corresponding path program 7 times [2018-06-22 05:48:41,629 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:48:41,629 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:48:41,630 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:48:41,630 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:48:41,630 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:48:41,667 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:48:41,942 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:48:41,942 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:48:41,942 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 05:48:41,950 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:48:41,978 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:48:41,981 INFO ]: Computing forward predicates... [2018-06-22 05:48:44,358 WARN ]: Spent 172.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 14 [2018-06-22 05:48:45,579 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:48:45,610 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:48:45,611 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2018-06-22 05:48:45,611 INFO ]: Interpolant automaton has 14 states [2018-06-22 05:48:45,611 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-22 05:48:45,611 INFO ]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-06-22 05:48:45,611 INFO ]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-06-22 05:48:45,955 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:48:45,955 INFO ]: Finished difference Result 16 states and 16 transitions. [2018-06-22 05:48:45,955 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 05:48:45,955 INFO ]: Start accepts. Automaton has 14 states. Word has length 14 [2018-06-22 05:48:45,956 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:48:45,956 INFO ]: With dead ends: 16 [2018-06-22 05:48:45,956 INFO ]: Without dead ends: 16 [2018-06-22 05:48:45,956 INFO ]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2018-06-22 05:48:45,956 INFO ]: Start minimizeSevpa. Operand 16 states. [2018-06-22 05:48:45,958 INFO ]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-06-22 05:48:45,958 INFO ]: Start removeUnreachable. Operand 16 states. [2018-06-22 05:48:45,958 INFO ]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-06-22 05:48:45,959 INFO ]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-06-22 05:48:45,959 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:48:45,959 INFO ]: Abstraction has 16 states and 16 transitions. [2018-06-22 05:48:45,959 INFO ]: Interpolant automaton has 14 states. [2018-06-22 05:48:45,959 INFO ]: Start isEmpty. Operand 16 states and 16 transitions. [2018-06-22 05:48:45,959 INFO ]: Finished isEmpty. Found accepting run of length 16 [2018-06-22 05:48:45,959 INFO ]: Found error trace [2018-06-22 05:48:45,959 INFO ]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:48:45,959 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:48:45,959 INFO ]: Analyzing trace with hash 1051911180, now seen corresponding path program 8 times [2018-06-22 05:48:45,959 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:48:45,959 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:48:45,960 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:48:45,960 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:48:45,960 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:48:46,015 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:48:46,242 INFO ]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:48:46,242 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:48:46,242 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 05:48:46,249 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 05:48:46,305 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:48:46,305 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:48:46,309 INFO ]: Computing forward predicates... [2018-06-22 05:48:52,123 INFO ]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:48:52,143 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:48:52,143 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2018-06-22 05:48:52,143 INFO ]: Interpolant automaton has 15 states [2018-06-22 05:48:52,143 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-22 05:48:52,143 INFO ]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2018-06-22 05:48:52,144 INFO ]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-06-22 05:48:52,460 WARN ]: Spent 154.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2018-06-22 05:48:52,755 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:48:52,755 INFO ]: Finished difference Result 17 states and 17 transitions. [2018-06-22 05:48:52,755 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 05:48:52,756 INFO ]: Start accepts. Automaton has 15 states. Word has length 15 [2018-06-22 05:48:52,756 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:48:52,756 INFO ]: With dead ends: 17 [2018-06-22 05:48:52,756 INFO ]: Without dead ends: 17 [2018-06-22 05:48:52,757 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2018-06-22 05:48:52,757 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 05:48:52,758 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 05:48:52,758 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 05:48:52,758 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-06-22 05:48:52,759 INFO ]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-06-22 05:48:52,759 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:48:52,759 INFO ]: Abstraction has 17 states and 17 transitions. [2018-06-22 05:48:52,759 INFO ]: Interpolant automaton has 15 states. [2018-06-22 05:48:52,759 INFO ]: Start isEmpty. Operand 17 states and 17 transitions. [2018-06-22 05:48:52,759 INFO ]: Finished isEmpty. Found accepting run of length 17 [2018-06-22 05:48:52,759 INFO ]: Found error trace [2018-06-22 05:48:52,759 INFO ]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:48:52,759 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:48:52,759 INFO ]: Analyzing trace with hash -1752374252, now seen corresponding path program 9 times [2018-06-22 05:48:52,759 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:48:52,759 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:48:52,760 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:48:52,760 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:48:52,760 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:48:52,791 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:48:53,317 WARN ]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 05:48:54,045 WARN ]: Spent 661.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 11 [2018-06-22 05:48:54,140 INFO ]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:48:54,141 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:48:54,141 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:48:54,148 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 05:48:54,184 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-06-22 05:48:54,184 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:48:54,187 INFO ]: Computing forward predicates... [2018-06-22 05:48:56,249 INFO ]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:48:56,269 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:48:56,269 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2018-06-22 05:48:56,270 INFO ]: Interpolant automaton has 16 states [2018-06-22 05:48:56,270 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 05:48:56,270 INFO ]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2018-06-22 05:48:56,270 INFO ]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-06-22 05:48:56,740 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:48:56,740 INFO ]: Finished difference Result 18 states and 18 transitions. [2018-06-22 05:48:56,770 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 05:48:56,771 INFO ]: Start accepts. Automaton has 16 states. Word has length 16 [2018-06-22 05:48:56,771 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:48:56,771 INFO ]: With dead ends: 18 [2018-06-22 05:48:56,771 INFO ]: Without dead ends: 18 [2018-06-22 05:48:56,772 INFO ]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=203, Invalid=447, Unknown=0, NotChecked=0, Total=650 [2018-06-22 05:48:56,772 INFO ]: Start minimizeSevpa. Operand 18 states. [2018-06-22 05:48:56,773 INFO ]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-06-22 05:48:56,773 INFO ]: Start removeUnreachable. Operand 18 states. [2018-06-22 05:48:56,774 INFO ]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-06-22 05:48:56,774 INFO ]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-06-22 05:48:56,774 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:48:56,774 INFO ]: Abstraction has 18 states and 18 transitions. [2018-06-22 05:48:56,774 INFO ]: Interpolant automaton has 16 states. [2018-06-22 05:48:56,774 INFO ]: Start isEmpty. Operand 18 states and 18 transitions. [2018-06-22 05:48:56,774 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 05:48:56,774 INFO ]: Found error trace [2018-06-22 05:48:56,774 INFO ]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:48:56,774 INFO ]: === Iteration 11 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:48:56,775 INFO ]: Analyzing trace with hash 1509090572, now seen corresponding path program 10 times [2018-06-22 05:48:56,775 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:48:56,775 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:48:56,775 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:48:56,775 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:48:56,775 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:48:56,829 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:48:57,201 INFO ]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:48:57,201 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:48:57,201 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 [2018-06-22 05:48:57,208 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 05:48:57,242 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 05:48:57,242 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:48:57,245 INFO ]: Computing forward predicates... [2018-06-22 05:48:58,609 INFO ]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:48:58,629 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:48:58,629 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2018-06-22 05:48:58,630 INFO ]: Interpolant automaton has 17 states [2018-06-22 05:48:58,630 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 05:48:58,630 INFO ]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2018-06-22 05:48:58,630 INFO ]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-06-22 05:48:59,211 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:48:59,211 INFO ]: Finished difference Result 19 states and 19 transitions. [2018-06-22 05:48:59,211 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-06-22 05:48:59,211 INFO ]: Start accepts. Automaton has 17 states. Word has length 17 [2018-06-22 05:48:59,211 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:48:59,211 INFO ]: With dead ends: 19 [2018-06-22 05:48:59,211 INFO ]: Without dead ends: 19 [2018-06-22 05:48:59,212 INFO ]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2018-06-22 05:48:59,212 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 05:48:59,214 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 05:48:59,214 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 05:48:59,214 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-06-22 05:48:59,214 INFO ]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-06-22 05:48:59,214 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:48:59,214 INFO ]: Abstraction has 19 states and 19 transitions. [2018-06-22 05:48:59,214 INFO ]: Interpolant automaton has 17 states. [2018-06-22 05:48:59,214 INFO ]: Start isEmpty. Operand 19 states and 19 transitions. [2018-06-22 05:48:59,215 INFO ]: Finished isEmpty. Found accepting run of length 19 [2018-06-22 05:48:59,215 INFO ]: Found error trace [2018-06-22 05:48:59,215 INFO ]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:48:59,215 INFO ]: === Iteration 12 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:48:59,215 INFO ]: Analyzing trace with hash -464714988, now seen corresponding path program 11 times [2018-06-22 05:48:59,215 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:48:59,215 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:48:59,216 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:48:59,216 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:48:59,216 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:48:59,271 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:48:59,723 INFO ]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:48:59,723 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:48:59,723 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:48:59,731 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 05:48:59,775 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-06-22 05:48:59,775 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:48:59,778 INFO ]: Computing forward predicates... [2018-06-22 05:49:00,292 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:49:01,489 WARN ]: Spent 327.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 22 [2018-06-22 05:49:01,852 INFO ]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:49:01,873 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:49:01,892 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2018-06-22 05:49:01,893 INFO ]: Interpolant automaton has 22 states [2018-06-22 05:49:01,893 INFO ]: Constructing interpolant automaton starting with 22 interpolants. [2018-06-22 05:49:01,893 INFO ]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2018-06-22 05:49:01,893 INFO ]: Start difference. First operand 19 states and 19 transitions. Second operand 22 states. [2018-06-22 05:49:02,046 WARN ]: Spent 110.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 7 [2018-06-22 05:49:02,272 WARN ]: Spent 113.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2018-06-22 05:49:02,275 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:49:02,275 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-22 05:49:02,277 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 05:49:02,277 INFO ]: Start accepts. Automaton has 22 states. Word has length 18 [2018-06-22 05:49:02,277 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:49:02,277 INFO ]: With dead ends: 15 [2018-06-22 05:49:02,277 INFO ]: Without dead ends: 0 [2018-06-22 05:49:02,278 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2018-06-22 05:49:02,278 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 05:49:02,278 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 05:49:02,278 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 05:49:02,278 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 05:49:02,278 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2018-06-22 05:49:02,278 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:49:02,278 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 05:49:02,278 INFO ]: Interpolant automaton has 22 states. [2018-06-22 05:49:02,278 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 05:49:02,278 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 05:49:02,283 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 05:49:02 BoogieIcfgContainer [2018-06-22 05:49:02,283 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 05:49:02,284 INFO ]: Toolchain (without parser) took 30783.62 ms. Allocated memory was 309.3 MB in the beginning and 1.2 GB in the end (delta: 850.9 MB). Free memory was 263.7 MB in the beginning and 516.3 MB in the end (delta: -252.6 MB). Peak memory consumption was 598.3 MB. Max. memory is 3.6 GB. [2018-06-22 05:49:02,284 INFO ]: SmtParser took 0.10 ms. Allocated memory is still 309.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 05:49:02,285 INFO ]: ChcToBoogie took 59.02 ms. Allocated memory is still 309.3 MB. Free memory was 263.7 MB in the beginning and 261.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:49:02,285 INFO ]: Boogie Preprocessor took 42.96 ms. Allocated memory is still 309.3 MB. Free memory was 261.7 MB in the beginning and 259.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:49:02,286 INFO ]: RCFGBuilder took 144.29 ms. Allocated memory is still 309.3 MB. Free memory was 259.7 MB in the beginning and 251.7 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:49:02,287 INFO ]: TraceAbstraction took 30527.85 ms. Allocated memory was 309.3 MB in the beginning and 1.2 GB in the end (delta: 850.9 MB). Free memory was 251.7 MB in the beginning and 516.3 MB in the end (delta: -264.6 MB). Peak memory consumption was 586.3 MB. Max. memory is 3.6 GB. [2018-06-22 05:49:02,289 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.10 ms. Allocated memory is still 309.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 59.02 ms. Allocated memory is still 309.3 MB. Free memory was 263.7 MB in the beginning and 261.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 42.96 ms. Allocated memory is still 309.3 MB. Free memory was 261.7 MB in the beginning and 259.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 144.29 ms. Allocated memory is still 309.3 MB. Free memory was 259.7 MB in the beginning and 251.7 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 30527.85 ms. Allocated memory was 309.3 MB in the beginning and 1.2 GB in the end (delta: 850.9 MB). Free memory was 251.7 MB in the beginning and 516.3 MB in the end (delta: -264.6 MB). Peak memory consumption was 586.3 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 2 procedures, 10 locations, 1 error locations. SAFE Result, 30.4s OverallTime, 12 OverallIterations, 11 TraceHistogramMax, 5.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 80 SDtfs, 28 SDslu, 341 SDs, 0 SdLazy, 115 SolverSat, 78 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 300 GetRequests, 86 SyntacticMatches, 39 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 11.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=11, 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, 12 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 23.4s InterpolantComputationTime, 293 NumberOfCodeBlocks, 293 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 270 ConstructedInterpolants, 0 QuantifiedInterpolants, 23626 SizeOfPredicates, 44 NumberOfNonLiveVariables, 1705 ConjunctsInSsa, 498 ConjunctsInUnsatCore, 23 InterpolantComputations, 1 PerfectInterpolantSequences, 0/572 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/pldi08.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_05-49-02-303.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/pldi08.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_05-49-02-303.csv Received shutdown request...