java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/cav12/floppy_simpl3.cil.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:02:39,878 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:02:39,881 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:02:39,893 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:02:39,893 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:02:39,894 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:02:39,897 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:02:39,899 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:02:39,901 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:02:39,901 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:02:39,903 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:02:39,904 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:02:39,904 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:02:39,905 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:02:39,908 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:02:39,908 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:02:39,910 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:02:39,919 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:02:39,920 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:02:39,921 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:02:39,925 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:02:39,927 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:02:39,927 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:02:39,927 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:02:39,930 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:02:39,931 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:02:39,932 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:02:39,932 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:02:39,933 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:02:39,933 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:02:39,937 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:02:39,938 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:02:39,938 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:02:39,939 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:02:39,939 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:02:39,940 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 14:02:39,959 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:02:39,960 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:02:39,961 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:02:39,961 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:02:39,962 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:02:39,962 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:02:39,962 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:02:39,962 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:02:39,963 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:02:39,963 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:02:39,963 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:02:39,963 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:02:39,963 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:02:39,964 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:02:39,964 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:02:39,964 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:02:39,965 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:02:39,965 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:02:39,965 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:02:39,966 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:02:39,967 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:02:40,012 INFO ]: Repository-Root is: /tmp [2018-06-22 14:02:40,028 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:02:40,032 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:02:40,034 INFO ]: Initializing SmtParser... [2018-06-22 14:02:40,034 INFO ]: SmtParser initialized [2018-06-22 14:02:40,035 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/floppy_simpl3.cil.smt2 [2018-06-22 14:02:40,036 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 14:02:40,121 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/floppy_simpl3.cil.smt2 unknown [2018-06-22 14:02:41,258 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/floppy_simpl3.cil.smt2 [2018-06-22 14:02:41,262 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:02:41,268 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:02:41,269 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:02:41,269 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:02:41,269 INFO ]: ChcToBoogie initialized [2018-06-22 14:02:41,272 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:02:41" (1/1) ... [2018-06-22 14:02:41,347 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:02:41 Unit [2018-06-22 14:02:41,347 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:02:41,347 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:02:41,347 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:02:41,347 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:02:41,368 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:02:41" (1/1) ... [2018-06-22 14:02:41,368 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:02:41" (1/1) ... [2018-06-22 14:02:41,397 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:02:41" (1/1) ... [2018-06-22 14:02:41,397 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:02:41" (1/1) ... [2018-06-22 14:02:41,428 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:02:41" (1/1) ... [2018-06-22 14:02:41,429 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:02:41" (1/1) ... [2018-06-22 14:02:41,443 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:02:41" (1/1) ... [2018-06-22 14:02:41,455 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:02:41,455 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:02:41,455 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:02:41,455 INFO ]: RCFGBuilder initialized [2018-06-22 14:02:41,456 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:02:41" (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 14:02:41,472 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:02:41,472 INFO ]: Found specification of procedure False [2018-06-22 14:02:41,473 INFO ]: Found implementation of procedure False [2018-06-22 14:02:41,473 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:02:41,473 INFO ]: Found specification of procedure state [2018-06-22 14:02:41,473 INFO ]: Found implementation of procedure state [2018-06-22 14:02:41,473 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:02:41,473 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:02:41,473 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 14:02:42,212 INFO ]: Using library mode [2018-06-22 14:02:42,213 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:02:42 BoogieIcfgContainer [2018-06-22 14:02:42,213 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:02:42,214 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:02:42,214 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:02:42,217 INFO ]: TraceAbstraction initialized [2018-06-22 14:02:42,217 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:02:41" (1/3) ... [2018-06-22 14:02:42,218 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e7053e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:02:42, skipping insertion in model container [2018-06-22 14:02:42,218 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:02:41" (2/3) ... [2018-06-22 14:02:42,218 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e7053e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:02:42, skipping insertion in model container [2018-06-22 14:02:42,219 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:02:42" (3/3) ... [2018-06-22 14:02:42,221 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:02:42,231 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:02:42,241 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:02:42,289 INFO ]: Using default assertion order modulation [2018-06-22 14:02:42,289 INFO ]: Interprodecural is true [2018-06-22 14:02:42,289 INFO ]: Hoare is false [2018-06-22 14:02:42,290 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:02:42,290 INFO ]: Backedges is TWOTRACK [2018-06-22 14:02:42,290 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:02:42,290 INFO ]: Difference is false [2018-06-22 14:02:42,290 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:02:42,290 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:02:42,307 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:02:42,318 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:02:42,318 INFO ]: Found error trace [2018-06-22 14:02:42,319 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:02:42,319 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:02:42,324 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 14:02:42,327 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:02:42,327 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:02:42,376 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:02:42,376 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:02:42,376 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:02:42,426 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:02:42,595 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:02:42,599 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:02:42,599 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:02:42,601 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:02:42,618 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:02:42,619 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:02:42,621 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:02:42,817 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:02:42,817 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:02:42,818 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:02:42,820 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:02:42,820 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:02:42,834 INFO ]: With dead ends: 13 [2018-06-22 14:02:42,834 INFO ]: Without dead ends: 13 [2018-06-22 14:02:42,839 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:02:42,857 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:02:42,892 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:02:42,893 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:02:42,894 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:02:42,895 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:02:42,895 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:02:42,896 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:02:42,896 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:02:42,896 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:02:42,897 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:02:42,897 INFO ]: Found error trace [2018-06-22 14:02:42,897 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:02:42,897 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:02:42,897 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 14:02:42,897 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:02:42,897 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:02:42,898 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:02:42,898 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:02:42,898 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:02:43,228 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:02:43,826 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:02:43,826 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:02:43,826 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) [2018-06-22 14:02:43,844 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:02:44,008 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:02:44,026 INFO ]: Computing forward predicates... [2018-06-22 14:02:46,257 WARN ]: Spent 1.28 s on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2018-06-22 14:02:46,421 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:02:46,442 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:02:46,442 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-22 14:02:46,443 INFO ]: Interpolant automaton has 8 states [2018-06-22 14:02:46,443 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 14:02:46,443 INFO ]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-06-22 14:02:46,443 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-22 14:02:47,136 WARN ]: Spent 419.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2018-06-22 14:02:47,155 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:02:47,155 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 14:02:47,156 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 14:02:47,156 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-22 14:02:47,156 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:02:47,157 INFO ]: With dead ends: 15 [2018-06-22 14:02:47,157 INFO ]: Without dead ends: 15 [2018-06-22 14:02:47,157 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-06-22 14:02:47,157 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 14:02:47,160 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 14:02:47,160 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 14:02:47,160 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 14:02:47,160 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 14:02:47,160 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:02:47,161 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 14:02:47,161 INFO ]: Interpolant automaton has 8 states. [2018-06-22 14:02:47,161 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 14:02:47,161 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 14:02:47,161 INFO ]: Found error trace [2018-06-22 14:02:47,161 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:02:47,161 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:02:47,161 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 14:02:47,161 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:02:47,161 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:02:47,162 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:02:47,162 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:02:47,162 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:02:47,570 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:02:49,681 WARN ]: Spent 1.52 s on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2018-06-22 14:02:49,899 WARN ]: Spent 146.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2018-06-22 14:02:49,967 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:02:49,967 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:02:49,967 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:02:49,985 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 14:02:50,206 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:02:50,206 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:02:50,226 INFO ]: Computing forward predicates... [2018-06-22 14:02:51,561 WARN ]: Spent 615.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2018-06-22 14:03:00,602 WARN ]: Spent 2.06 s on a formula simplification. DAG size of input: 149 DAG size of output: 82 [2018-06-22 14:03:01,761 WARN ]: Spent 536.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2018-06-22 14:03:02,252 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:03:02,286 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:03:02,299 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-06-22 14:03:02,299 INFO ]: Interpolant automaton has 12 states [2018-06-22 14:03:02,299 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 14:03:02,300 INFO ]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2018-06-22 14:03:02,300 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-06-22 14:03:06,080 WARN ]: Spent 3.54 s on a formula simplification. DAG size of input: 111 DAG size of output: 98 [2018-06-22 14:03:07,131 WARN ]: Spent 922.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 73 [2018-06-22 14:03:08,060 WARN ]: Spent 861.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 94 [2018-06-22 14:03:08,101 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:03:08,101 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 14:03:08,102 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:03:08,102 INFO ]: Start accepts. Automaton has 12 states. Word has length 17 [2018-06-22 14:03:08,102 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:03:08,102 INFO ]: With dead ends: 17 [2018-06-22 14:03:08,102 INFO ]: Without dead ends: 17 [2018-06-22 14:03:08,103 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2018-06-22 14:03:08,103 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 14:03:08,105 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 14:03:08,105 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 14:03:08,105 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 14:03:08,105 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 14:03:08,105 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:03:08,105 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 14:03:08,105 INFO ]: Interpolant automaton has 12 states. [2018-06-22 14:03:08,105 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 14:03:08,106 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 14:03:08,106 INFO ]: Found error trace [2018-06-22 14:03:08,106 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:03:08,106 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:03:08,106 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 14:03:08,106 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:03:08,106 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:03:08,107 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:03:08,107 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:03:08,107 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:03:08,498 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:03:09,343 WARN ]: Spent 101.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2018-06-22 14:03:09,651 WARN ]: Spent 289.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 75 [2018-06-22 14:03:09,869 WARN ]: Spent 202.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 54 [2018-06-22 14:03:10,082 WARN ]: Spent 185.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 49 [2018-06-22 14:03:10,156 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:03:10,156 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:03:10,156 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 14:03:10,170 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 14:03:10,502 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 14:03:10,502 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:03:10,528 INFO ]: Computing forward predicates... [2018-06-22 14:03:11,701 WARN ]: Spent 565.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2018-06-22 14:03:17,040 WARN ]: Spent 2.76 s on a formula simplification. DAG size of input: 157 DAG size of output: 119 Received shutdown request... [2018-06-22 14:03:39,995 INFO ]: Timeout while computing interpolants [2018-06-22 14:03:40,196 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:03:40,196 WARN ]: Verification canceled [2018-06-22 14:03:40,200 WARN ]: Timeout [2018-06-22 14:03:40,201 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 02:03:40 BoogieIcfgContainer [2018-06-22 14:03:40,201 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 14:03:40,201 INFO ]: Toolchain (without parser) took 58938.70 ms. Allocated memory was 339.2 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 295.8 MB in the beginning and 1.2 GB in the end (delta: -916.4 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 14:03:40,202 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 309.3 MB. Free memory is still 274.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 14:03:40,202 INFO ]: ChcToBoogie took 78.46 ms. Allocated memory is still 339.2 MB. Free memory was 295.8 MB in the beginning and 290.7 MB in the end (delta: 5.1 MB). Peak memory consumption was 5.1 MB. Max. memory is 3.6 GB. [2018-06-22 14:03:40,202 INFO ]: Boogie Preprocessor took 107.50 ms. Allocated memory is still 339.2 MB. Free memory was 290.7 MB in the beginning and 287.4 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 3.6 GB. [2018-06-22 14:03:40,203 INFO ]: RCFGBuilder took 757.43 ms. Allocated memory is still 339.2 MB. Free memory was 287.4 MB in the beginning and 207.9 MB in the end (delta: 79.5 MB). Peak memory consumption was 79.5 MB. Max. memory is 3.6 GB. [2018-06-22 14:03:40,203 INFO ]: TraceAbstraction took 57987.02 ms. Allocated memory was 339.2 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 207.9 MB in the beginning and 1.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 14:03:40,206 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 309.3 MB. Free memory is still 274.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 78.46 ms. Allocated memory is still 339.2 MB. Free memory was 295.8 MB in the beginning and 290.7 MB in the end (delta: 5.1 MB). Peak memory consumption was 5.1 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 107.50 ms. Allocated memory is still 339.2 MB. Free memory was 290.7 MB in the beginning and 287.4 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 3.6 GB. * RCFGBuilder took 757.43 ms. Allocated memory is still 339.2 MB. Free memory was 287.4 MB in the beginning and 207.9 MB in the end (delta: 79.5 MB). Peak memory consumption was 79.5 MB. Max. memory is 3.6 GB. * TraceAbstraction took 57987.02 ms. Allocated memory was 339.2 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 207.9 MB in the beginning and 1.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 22 with TraceHistMax 4, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while XnfDer was eliminating 6942 quantified variables from 61 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 57.9s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 6.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 33 SDtfs, 13 SDslu, 78 SDs, 0 SdLazy, 57 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 13.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=3, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 17.6s InterpolantComputationTime, 69 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 64 ConstructedInterpolants, 0 QuantifiedInterpolants, 28940 SizeOfPredicates, 1198 NumberOfNonLiveVariables, 664 ConjunctsInSsa, 46 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 8/26 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/floppy_simpl3.cil.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_14-03-40-215.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/floppy_simpl3.cil.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_14-03-40-215.csv Completed graceful shutdown