java -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf -i /storage/chc-comp/vmt-chc-benchmarks/lustre/two_counters.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 17:13:20,108 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 17:13:20,110 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 17:13:20,126 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 17:13:20,126 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 17:13:20,127 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 17:13:20,128 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 17:13:20,131 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 17:13:20,133 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 17:13:20,135 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 17:13:20,136 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 17:13:20,136 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 17:13:20,137 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 17:13:20,138 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 17:13:20,139 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 17:13:20,142 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 17:13:20,144 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 17:13:20,153 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 17:13:20,154 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 17:13:20,155 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 17:13:20,156 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 17:13:20,158 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 17:13:20,163 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 17:13:20,163 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 17:13:20,164 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 17:13:20,165 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 17:13:20,166 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 17:13:20,166 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 17:13:20,169 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 17:13:20,170 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 17:13:20,170 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 17:13:20,171 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 17:13:20,171 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 17:13:20,173 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 17:13:20,174 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 17:13:20,174 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 17:13:20,188 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 17:13:20,189 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 17:13:20,189 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 17:13:20,189 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 17:13:20,191 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 17:13:20,191 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 17:13:20,191 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 17:13:20,191 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 17:13:20,191 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 17:13:20,192 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 17:13:20,192 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 17:13:20,192 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 17:13:20,192 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 17:13:20,192 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 17:13:20,193 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 17:13:20,193 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 17:13:20,193 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 17:13:20,194 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 17:13:20,195 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 17:13:20,239 INFO ]: Repository-Root is: /tmp [2018-06-18 17:13:20,257 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 17:13:20,263 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 17:13:20,264 INFO ]: Initializing SmtParser... [2018-06-18 17:13:20,265 INFO ]: SmtParser initialized [2018-06-18 17:13:20,265 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/two_counters.smt2 [2018-06-18 17:13:20,267 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-18 17:13:20,371 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/two_counters.smt2 unknown [2018-06-18 17:13:20,594 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/two_counters.smt2 [2018-06-18 17:13:20,599 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 17:13:20,606 INFO ]: Walking toolchain with 4 elements. [2018-06-18 17:13:20,606 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 17:13:20,606 INFO ]: Initializing ChcToBoogie... [2018-06-18 17:13:20,606 INFO ]: ChcToBoogie initialized [2018-06-18 17:13:20,613 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 05:13:20" (1/1) ... [2018-06-18 17:13:20,673 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 05:13:20 Unit [2018-06-18 17:13:20,673 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 17:13:20,674 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 17:13:20,674 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 17:13:20,674 INFO ]: Boogie Preprocessor initialized [2018-06-18 17:13:20,698 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 05:13:20" (1/1) ... [2018-06-18 17:13:20,698 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 05:13:20" (1/1) ... [2018-06-18 17:13:20,707 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 05:13:20" (1/1) ... [2018-06-18 17:13:20,707 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 05:13:20" (1/1) ... [2018-06-18 17:13:20,714 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 05:13:20" (1/1) ... [2018-06-18 17:13:20,715 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 05:13:20" (1/1) ... [2018-06-18 17:13:20,716 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 05:13:20" (1/1) ... [2018-06-18 17:13:20,729 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 17:13:20,730 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 17:13:20,730 INFO ]: Initializing RCFGBuilder... [2018-06-18 17:13:20,730 INFO ]: RCFGBuilder initialized [2018-06-18 17:13:20,731 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 05:13:20" (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) [2018-06-18 17:13:20,747 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 17:13:20,747 INFO ]: Found specification of procedure False [2018-06-18 17:13:20,747 INFO ]: Found implementation of procedure False [2018-06-18 17:13:20,747 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-18 17:13:20,747 INFO ]: Found specification of procedure state [2018-06-18 17:13:20,747 INFO ]: Found implementation of procedure state [2018-06-18 17:13:20,747 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 17:13:20,747 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 17:13:20,747 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 [2018-06-18 17:13:20,993 INFO ]: Using library mode [2018-06-18 17:13:20,994 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 05:13:20 BoogieIcfgContainer [2018-06-18 17:13:20,994 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 17:13:20,995 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 17:13:20,995 INFO ]: Initializing TraceAbstraction... [2018-06-18 17:13:20,998 INFO ]: TraceAbstraction initialized [2018-06-18 17:13:20,999 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 05:13:20" (1/3) ... [2018-06-18 17:13:21,000 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2062da0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 05:13:20, skipping insertion in model container [2018-06-18 17:13:21,000 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 05:13:20" (2/3) ... [2018-06-18 17:13:21,000 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2062da0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 05:13:21, skipping insertion in model container [2018-06-18 17:13:21,000 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 05:13:20" (3/3) ... [2018-06-18 17:13:21,002 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 17:13:21,009 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 17:13:21,018 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 17:13:21,060 INFO ]: Using default assertion order modulation [2018-06-18 17:13:21,061 INFO ]: Interprodecural is true [2018-06-18 17:13:21,061 INFO ]: Hoare is false [2018-06-18 17:13:21,061 INFO ]: Compute interpolants for FPandBP [2018-06-18 17:13:21,061 INFO ]: Backedges is TWOTRACK [2018-06-18 17:13:21,061 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 17:13:21,061 INFO ]: Difference is false [2018-06-18 17:13:21,061 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 17:13:21,061 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 17:13:21,074 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 17:13:21,084 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 17:13:21,085 INFO ]: Found error trace [2018-06-18 17:13:21,085 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 17:13:21,086 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 17:13:21,090 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-18 17:13:21,092 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 17:13:21,092 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 17:13:21,127 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 17:13:21,127 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 17:13:21,127 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 17:13:21,165 INFO ]: Conjunction of SSA is unsat [2018-06-18 17:13:21,173 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 17:13:21,303 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 17:13:21,305 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 17:13:21,305 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 17:13:21,307 INFO ]: Interpolant automaton has 4 states [2018-06-18 17:13:21,318 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 17:13:21,319 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 17:13:21,320 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 17:13:21,418 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 17:13:21,419 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 17:13:21,419 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 17:13:21,420 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 17:13:21,421 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 17:13:21,431 INFO ]: With dead ends: 13 [2018-06-18 17:13:21,431 INFO ]: Without dead ends: 13 [2018-06-18 17:13:21,432 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 [2018-06-18 17:13:21,450 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 17:13:21,476 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 17:13:21,477 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 17:13:21,478 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 17:13:21,479 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 17:13:21,479 INFO ]: Finished accepts. word is rejected. [2018-06-18 17:13:21,479 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 17:13:21,479 INFO ]: Interpolant automaton has 4 states. [2018-06-18 17:13:21,480 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 17:13:21,481 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 17:13:21,481 INFO ]: Found error trace [2018-06-18 17:13:21,481 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 17:13:21,481 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 17:13:21,481 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-18 17:13:21,482 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 17:13:21,482 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 17:13:21,483 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 17:13:21,483 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 17:13:21,483 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 17:13:21,516 INFO ]: Conjunction of SSA is unsat [2018-06-18 17:13:21,516 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 17:13:22,180 WARN ]: Spent 493.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2018-06-18 17:13:22,272 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 17:13:22,272 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 17:13:22,272 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 17:13:22,280 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 17:13:22,316 INFO ]: Conjunction of SSA is unsat [2018-06-18 17:13:22,324 INFO ]: Computing forward predicates... [2018-06-18 17:13:22,884 WARN ]: Spent 266.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 6 [2018-06-18 17:13:22,982 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 17:13:23,005 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 17:13:23,005 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-18 17:13:23,006 INFO ]: Interpolant automaton has 9 states [2018-06-18 17:13:23,006 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-18 17:13:23,006 INFO ]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-06-18 17:13:23,006 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-18 17:13:23,261 WARN ]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2018-06-18 17:13:23,738 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 17:13:23,738 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 17:13:23,740 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 17:13:23,740 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-18 17:13:23,740 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 17:13:23,741 INFO ]: With dead ends: 15 [2018-06-18 17:13:23,741 INFO ]: Without dead ends: 15 [2018-06-18 17:13:23,742 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-06-18 17:13:23,742 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 17:13:23,744 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 17:13:23,744 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 17:13:23,745 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 17:13:23,745 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 17:13:23,746 INFO ]: Finished accepts. word is rejected. [2018-06-18 17:13:23,746 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 17:13:23,746 INFO ]: Interpolant automaton has 9 states. [2018-06-18 17:13:23,746 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 17:13:23,746 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 17:13:23,746 INFO ]: Found error trace [2018-06-18 17:13:23,746 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 17:13:23,747 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 17:13:23,747 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-18 17:13:23,747 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 17:13:23,747 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 17:13:23,748 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 17:13:23,748 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 17:13:23,748 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 17:13:23,792 INFO ]: Conjunction of SSA is unsat [2018-06-18 17:13:23,793 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 17:13:24,247 WARN ]: Spent 267.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2018-06-18 17:13:24,458 WARN ]: Spent 197.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2018-06-18 17:13:24,555 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 17:13:24,555 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 17:13:24,555 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 17:13:24,569 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 17:13:24,618 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 17:13:24,618 INFO ]: Conjunction of SSA is unsat [2018-06-18 17:13:24,622 INFO ]: Computing forward predicates... [2018-06-18 17:13:24,925 WARN ]: Spent 127.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2018-06-18 17:13:25,072 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 17:13:25,107 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 17:13:25,107 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-18 17:13:25,107 INFO ]: Interpolant automaton has 13 states [2018-06-18 17:13:25,107 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-18 17:13:25,108 INFO ]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2018-06-18 17:13:25,108 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-18 17:13:25,680 WARN ]: Spent 527.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 83 [2018-06-18 17:13:26,197 WARN ]: Spent 363.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 28 [2018-06-18 17:13:26,381 WARN ]: Spent 152.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 46 [2018-06-18 17:13:26,421 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 17:13:26,421 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-18 17:13:26,422 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-18 17:13:26,422 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-18 17:13:26,422 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 17:13:26,422 INFO ]: With dead ends: 17 [2018-06-18 17:13:26,423 INFO ]: Without dead ends: 17 [2018-06-18 17:13:26,423 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2018-06-18 17:13:26,423 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-18 17:13:26,426 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-18 17:13:26,427 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-18 17:13:26,427 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-18 17:13:26,427 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-18 17:13:26,427 INFO ]: Finished accepts. word is rejected. [2018-06-18 17:13:26,427 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-18 17:13:26,427 INFO ]: Interpolant automaton has 13 states. [2018-06-18 17:13:26,428 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-18 17:13:26,428 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-18 17:13:26,428 INFO ]: Found error trace [2018-06-18 17:13:26,428 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 17:13:26,428 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 17:13:26,429 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-18 17:13:26,429 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 17:13:26,429 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 17:13:26,430 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 17:13:26,430 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 17:13:26,430 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 17:13:26,460 INFO ]: Conjunction of SSA is unsat [2018-06-18 17:13:26,461 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 17:13:26,758 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 17:13:26,759 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 17:13:26,759 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 [2018-06-18 17:13:26,773 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-18 17:13:26,845 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-18 17:13:26,845 INFO ]: Conjunction of SSA is unsat [2018-06-18 17:13:26,849 INFO ]: Computing forward predicates... [2018-06-18 17:13:27,235 WARN ]: Spent 101.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 14 [2018-06-18 17:13:27,417 WARN ]: Spent 142.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2018-06-18 17:13:27,635 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 17:13:27,656 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 17:13:27,656 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-18 17:13:27,656 INFO ]: Interpolant automaton has 17 states [2018-06-18 17:13:27,656 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-18 17:13:27,656 INFO ]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2018-06-18 17:13:27,657 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-18 17:13:28,042 WARN ]: Spent 276.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2018-06-18 17:13:28,361 WARN ]: Spent 257.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 52 [2018-06-18 17:13:28,551 WARN ]: Spent 163.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2018-06-18 17:13:28,729 WARN ]: Spent 152.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2018-06-18 17:13:28,799 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 17:13:28,799 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-18 17:13:28,799 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-18 17:13:28,799 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-18 17:13:28,800 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 17:13:28,800 INFO ]: With dead ends: 19 [2018-06-18 17:13:28,800 INFO ]: Without dead ends: 19 [2018-06-18 17:13:28,801 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2018-06-18 17:13:28,801 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-18 17:13:28,804 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-18 17:13:28,804 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-18 17:13:28,805 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-18 17:13:28,805 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-18 17:13:28,805 INFO ]: Finished accepts. word is rejected. [2018-06-18 17:13:28,805 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-18 17:13:28,805 INFO ]: Interpolant automaton has 17 states. [2018-06-18 17:13:28,805 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-18 17:13:28,806 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-18 17:13:28,806 INFO ]: Found error trace [2018-06-18 17:13:28,806 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 17:13:28,806 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 17:13:28,807 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-18 17:13:28,807 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 17:13:28,807 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 17:13:28,807 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 17:13:28,807 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 17:13:28,807 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 17:13:28,840 INFO ]: Conjunction of SSA is unsat [2018-06-18 17:13:28,841 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 17:13:29,120 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-18 17:13:29,120 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 17:13:29,120 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 17:13:29,126 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-18 17:13:29,162 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-18 17:13:29,162 INFO ]: Conjunction of SSA is unsat [2018-06-18 17:13:29,167 INFO ]: Computing forward predicates... [2018-06-18 17:13:29,593 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-18 17:13:29,613 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 17:13:29,613 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2018-06-18 17:13:29,614 INFO ]: Interpolant automaton has 21 states [2018-06-18 17:13:29,614 INFO ]: Constructing interpolant automaton starting with 21 interpolants. [2018-06-18 17:13:29,614 INFO ]: CoverageRelationStatistics Valid=42, Invalid=378, Unknown=0, NotChecked=0, Total=420 [2018-06-18 17:13:29,614 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 21 states. [2018-06-18 17:13:29,869 WARN ]: Spent 151.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 59 [2018-06-18 17:13:30,393 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 17:13:30,393 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-18 17:13:30,415 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-18 17:13:30,415 INFO ]: Start accepts. Automaton has 21 states. Word has length 25 [2018-06-18 17:13:30,415 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 17:13:30,416 INFO ]: With dead ends: 25 [2018-06-18 17:13:30,416 INFO ]: Without dead ends: 25 [2018-06-18 17:13:30,417 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2018-06-18 17:13:30,417 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-18 17:13:30,422 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 23. [2018-06-18 17:13:30,422 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-18 17:13:30,423 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-18 17:13:30,423 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 25 [2018-06-18 17:13:30,423 INFO ]: Finished accepts. word is rejected. [2018-06-18 17:13:30,423 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-18 17:13:30,423 INFO ]: Interpolant automaton has 21 states. [2018-06-18 17:13:30,424 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-18 17:13:30,424 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-18 17:13:30,424 INFO ]: Found error trace [2018-06-18 17:13:30,424 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 17:13:30,425 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 17:13:30,425 INFO ]: Analyzing trace with hash 800064122, now seen corresponding path program 5 times [2018-06-18 17:13:30,425 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 17:13:30,425 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 17:13:30,425 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 17:13:30,425 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 17:13:30,425 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 17:13:30,492 INFO ]: Conjunction of SSA is unsat [2018-06-18 17:13:30,502 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 17:13:30,862 WARN ]: Spent 205.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2018-06-18 17:13:31,394 INFO ]: Checked inductivity of 78 backedges. 2 proven. 53 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-06-18 17:13:31,394 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 17:13:31,394 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 17:13:31,401 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-18 17:13:31,462 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-06-18 17:13:31,462 INFO ]: Conjunction of SSA is unsat [2018-06-18 17:13:31,468 INFO ]: Computing forward predicates... [2018-06-18 17:13:32,143 WARN ]: Spent 239.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2018-06-18 17:13:32,348 WARN ]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-06-18 17:13:34,247 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-18 17:13:34,267 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 17:13:34,267 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 27 [2018-06-18 17:13:34,267 INFO ]: Interpolant automaton has 27 states [2018-06-18 17:13:34,267 INFO ]: Constructing interpolant automaton starting with 27 interpolants. [2018-06-18 17:13:34,268 INFO ]: CoverageRelationStatistics Valid=56, Invalid=646, Unknown=0, NotChecked=0, Total=702 [2018-06-18 17:13:34,268 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 27 states. [2018-06-18 17:13:35,213 WARN ]: Spent 875.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 98 [2018-06-18 17:13:35,742 WARN ]: Spent 221.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 37 [2018-06-18 17:13:36,000 WARN ]: Spent 203.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 35 [2018-06-18 17:13:36,240 WARN ]: Spent 191.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 37 [2018-06-18 17:13:36,548 WARN ]: Spent 253.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 44 [2018-06-18 17:13:36,562 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 17:13:36,562 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-18 17:13:36,562 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-18 17:13:36,562 INFO ]: Start accepts. Automaton has 27 states. Word has length 33 [2018-06-18 17:13:36,563 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 17:13:36,563 INFO ]: With dead ends: 19 [2018-06-18 17:13:36,563 INFO ]: Without dead ends: 0 [2018-06-18 17:13:36,563 INFO ]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2018-06-18 17:13:36,563 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-18 17:13:36,563 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-18 17:13:36,563 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-18 17:13:36,563 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-18 17:13:36,564 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2018-06-18 17:13:36,564 INFO ]: Finished accepts. word is rejected. [2018-06-18 17:13:36,564 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-18 17:13:36,564 INFO ]: Interpolant automaton has 27 states. [2018-06-18 17:13:36,564 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-18 17:13:36,564 INFO ]: Finished isEmpty. No accepting run. [2018-06-18 17:13:36,574 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.06 05:13:36 BoogieIcfgContainer [2018-06-18 17:13:36,574 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-18 17:13:36,575 INFO ]: Toolchain (without parser) took 15975.25 ms. Allocated memory was 305.1 MB in the beginning and 489.7 MB in the end (delta: 184.5 MB). Free memory was 259.5 MB in the beginning and 294.0 MB in the end (delta: -34.4 MB). Peak memory consumption was 150.1 MB. Max. memory is 3.6 GB. [2018-06-18 17:13:36,576 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 305.1 MB. Free memory is still 269.6 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 17:13:36,576 INFO ]: ChcToBoogie took 67.59 ms. Allocated memory is still 305.1 MB. Free memory was 259.5 MB in the beginning and 257.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-18 17:13:36,576 INFO ]: Boogie Preprocessor took 55.06 ms. Allocated memory is still 305.1 MB. Free memory was 257.5 MB in the beginning and 255.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-18 17:13:36,577 INFO ]: RCFGBuilder took 263.84 ms. Allocated memory is still 305.1 MB. Free memory was 255.5 MB in the beginning and 245.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. [2018-06-18 17:13:36,577 INFO ]: TraceAbstraction took 15578.80 ms. Allocated memory was 305.1 MB in the beginning and 489.7 MB in the end (delta: 184.5 MB). Free memory was 245.6 MB in the beginning and 294.0 MB in the end (delta: -48.4 MB). Peak memory consumption was 136.2 MB. Max. memory is 3.6 GB. [2018-06-18 17:13:36,587 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.08 ms. Allocated memory is still 305.1 MB. Free memory is still 269.6 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 67.59 ms. Allocated memory is still 305.1 MB. Free memory was 259.5 MB in the beginning and 257.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 55.06 ms. Allocated memory is still 305.1 MB. Free memory was 257.5 MB in the beginning and 255.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 263.84 ms. Allocated memory is still 305.1 MB. Free memory was 255.5 MB in the beginning and 245.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 15578.80 ms. Allocated memory was 305.1 MB in the beginning and 489.7 MB in the end (delta: 184.5 MB). Free memory was 245.6 MB in the beginning and 294.0 MB in the end (delta: -48.4 MB). Peak memory consumption was 136.2 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, 13 locations, 1 error locations. SAFE Result, 15.5s OverallTime, 6 OverallIterations, 7 TraceHistogramMax, 6.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 72 SDtfs, 118 SDslu, 463 SDs, 0 SdLazy, 431 SolverSat, 151 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 183 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 11.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=5, 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, 6 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 8.2s InterpolantComputationTime, 227 NumberOfCodeBlocks, 227 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 216 ConstructedInterpolants, 0 QuantifiedInterpolants, 66020 SizeOfPredicates, 149 NumberOfNonLiveVariables, 914 ConjunctsInSsa, 259 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 86/296 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/two_counters.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-18_17-13-36-602.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/two_counters.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-18_17-13-36-602.csv Received shutdown request...