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/cav12/array_max-2.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 04:13:22,277 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 04:13:22,281 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 04:13:22,296 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 04:13:22,297 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 04:13:22,298 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 04:13:22,300 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 04:13:22,302 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 04:13:22,304 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 04:13:22,304 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 04:13:22,306 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 04:13:22,307 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 04:13:22,308 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 04:13:22,309 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 04:13:22,310 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 04:13:22,311 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 04:13:22,315 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 04:13:22,317 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 04:13:22,329 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 04:13:22,330 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 04:13:22,331 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 04:13:22,334 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 04:13:22,334 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 04:13:22,334 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 04:13:22,335 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 04:13:22,342 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 04:13:22,343 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 04:13:22,343 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 04:13:22,344 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 04:13:22,344 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 04:13:22,345 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 04:13:22,346 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 04:13:22,346 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 04:13:22,351 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 04:13:22,352 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 04:13:22,352 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 04:13:22,376 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 04:13:22,377 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 04:13:22,377 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 04:13:22,377 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 04:13:22,378 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 04:13:22,379 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 04:13:22,379 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 04:13:22,379 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 04:13:22,379 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 04:13:22,380 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 04:13:22,380 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 04:13:22,380 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 04:13:22,381 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 04:13:22,381 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 04:13:22,381 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 04:13:22,381 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 04:13:22,381 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 04:13:22,382 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 04:13:22,383 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 04:13:22,435 INFO ]: Repository-Root is: /tmp [2018-06-22 04:13:22,453 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 04:13:22,456 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 04:13:22,459 INFO ]: Initializing SmtParser... [2018-06-22 04:13:22,459 INFO ]: SmtParser initialized [2018-06-22 04:13:22,460 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/array_max-2.smt2 [2018-06-22 04:13:22,461 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 04:13:22,550 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/array_max-2.smt2 unknown [2018-06-22 04:13:22,947 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/array_max-2.smt2 [2018-06-22 04:13:22,952 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 04:13:22,959 INFO ]: Walking toolchain with 4 elements. [2018-06-22 04:13:22,959 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 04:13:22,959 INFO ]: Initializing ChcToBoogie... [2018-06-22 04:13:22,960 INFO ]: ChcToBoogie initialized [2018-06-22 04:13:22,963 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 04:13:22" (1/1) ... [2018-06-22 04:13:23,039 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:13:23 Unit [2018-06-22 04:13:23,039 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 04:13:23,040 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 04:13:23,040 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 04:13:23,040 INFO ]: Boogie Preprocessor initialized [2018-06-22 04:13:23,061 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:13:23" (1/1) ... [2018-06-22 04:13:23,061 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:13:23" (1/1) ... [2018-06-22 04:13:23,084 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:13:23" (1/1) ... [2018-06-22 04:13:23,084 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:13:23" (1/1) ... [2018-06-22 04:13:23,099 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:13:23" (1/1) ... [2018-06-22 04:13:23,100 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:13:23" (1/1) ... [2018-06-22 04:13:23,105 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:13:23" (1/1) ... [2018-06-22 04:13:23,109 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 04:13:23,109 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 04:13:23,109 INFO ]: Initializing RCFGBuilder... [2018-06-22 04:13:23,109 INFO ]: RCFGBuilder initialized [2018-06-22 04:13:23,110 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:13:23" (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 04:13:23,124 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 04:13:23,124 INFO ]: Found specification of procedure gotoProc [2018-06-22 04:13:23,124 INFO ]: Found implementation of procedure gotoProc [2018-06-22 04:13:23,125 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 04:13:23,125 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 04:13:23,125 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 04:13:23,545 INFO ]: Using library mode [2018-06-22 04:13:23,546 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 04:13:23 BoogieIcfgContainer [2018-06-22 04:13:23,546 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 04:13:23,549 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 04:13:23,549 INFO ]: Initializing TraceAbstraction... [2018-06-22 04:13:23,555 INFO ]: TraceAbstraction initialized [2018-06-22 04:13:23,555 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 04:13:22" (1/3) ... [2018-06-22 04:13:23,556 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a24ccbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 04:13:23, skipping insertion in model container [2018-06-22 04:13:23,556 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:13:23" (2/3) ... [2018-06-22 04:13:23,556 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a24ccbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 04:13:23, skipping insertion in model container [2018-06-22 04:13:23,556 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 04:13:23" (3/3) ... [2018-06-22 04:13:23,558 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 04:13:23,565 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 04:13:23,573 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 04:13:23,611 INFO ]: Using default assertion order modulation [2018-06-22 04:13:23,612 INFO ]: Interprodecural is true [2018-06-22 04:13:23,612 INFO ]: Hoare is false [2018-06-22 04:13:23,612 INFO ]: Compute interpolants for FPandBP [2018-06-22 04:13:23,612 INFO ]: Backedges is TWOTRACK [2018-06-22 04:13:23,612 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 04:13:23,612 INFO ]: Difference is false [2018-06-22 04:13:23,612 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 04:13:23,612 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 04:13:23,626 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 04:13:23,640 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 04:13:23,641 INFO ]: Found error trace [2018-06-22 04:13:23,641 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:13:23,642 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:13:23,648 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-22 04:13:23,651 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:13:23,651 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:13:23,688 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:13:23,688 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:13:23,688 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:13:23,762 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:13:23,839 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:13:23,840 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 04:13:23,840 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 04:13:23,842 INFO ]: Interpolant automaton has 3 states [2018-06-22 04:13:23,853 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 04:13:23,853 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 04:13:23,855 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 04:13:23,942 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:13:23,942 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 04:13:23,943 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 04:13:23,944 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 04:13:23,945 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:13:23,953 INFO ]: With dead ends: 9 [2018-06-22 04:13:23,953 INFO ]: Without dead ends: 9 [2018-06-22 04:13:23,955 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 04:13:23,976 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 04:13:23,999 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 04:13:24,000 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 04:13:24,001 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 04:13:24,002 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 04:13:24,002 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:13:24,002 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 04:13:24,002 INFO ]: Interpolant automaton has 3 states. [2018-06-22 04:13:24,002 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 04:13:24,002 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 04:13:24,002 INFO ]: Found error trace [2018-06-22 04:13:24,002 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:13:24,003 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:13:24,003 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-22 04:13:24,003 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:13:24,003 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:13:24,004 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:13:24,004 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:13:24,004 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:13:24,117 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:13:24,315 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:13:24,315 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:13:24,315 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 04:13:24,322 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:13:24,436 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:13:24,448 INFO ]: Computing forward predicates... [2018-06-22 04:13:25,327 WARN ]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-22 04:13:25,339 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:13:25,375 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 04:13:25,375 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-22 04:13:25,376 INFO ]: Interpolant automaton has 6 states [2018-06-22 04:13:25,376 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 04:13:25,376 INFO ]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-22 04:13:25,376 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-06-22 04:13:25,736 WARN ]: Spent 302.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 7 [2018-06-22 04:13:25,920 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:13:25,920 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 04:13:25,921 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 04:13:25,921 INFO ]: Start accepts. Automaton has 6 states. Word has length 8 [2018-06-22 04:13:25,921 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:13:25,921 INFO ]: With dead ends: 11 [2018-06-22 04:13:25,921 INFO ]: Without dead ends: 11 [2018-06-22 04:13:25,922 INFO ]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-06-22 04:13:25,922 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 04:13:25,923 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 04:13:25,923 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 04:13:25,923 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 04:13:25,924 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-22 04:13:25,924 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:13:25,924 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 04:13:25,924 INFO ]: Interpolant automaton has 6 states. [2018-06-22 04:13:25,924 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 04:13:25,924 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 04:13:25,924 INFO ]: Found error trace [2018-06-22 04:13:25,924 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:13:25,924 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:13:25,924 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 2 times [2018-06-22 04:13:25,924 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:13:25,924 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:13:25,925 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:13:25,925 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:13:25,925 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:13:26,165 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:13:26,797 WARN ]: Spent 289.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 10 [2018-06-22 04:13:26,855 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:13:26,855 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:13:26,855 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 04:13:26,862 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 04:13:26,986 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 04:13:26,986 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:13:26,997 INFO ]: Computing forward predicates... [2018-06-22 04:13:28,166 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:13:28,187 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 04:13:28,187 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 04:13:28,188 INFO ]: Interpolant automaton has 10 states [2018-06-22 04:13:28,188 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 04:13:28,188 INFO ]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-06-22 04:13:28,188 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-06-22 04:13:28,354 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:13:28,354 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 04:13:28,355 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 04:13:28,355 INFO ]: Start accepts. Automaton has 10 states. Word has length 10 [2018-06-22 04:13:28,355 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:13:28,355 INFO ]: With dead ends: 13 [2018-06-22 04:13:28,355 INFO ]: Without dead ends: 13 [2018-06-22 04:13:28,356 INFO ]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-06-22 04:13:28,356 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 04:13:28,358 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 04:13:28,358 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 04:13:28,358 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 04:13:28,358 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-06-22 04:13:28,358 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:13:28,358 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 04:13:28,359 INFO ]: Interpolant automaton has 10 states. [2018-06-22 04:13:28,359 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 04:13:28,359 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 04:13:28,359 INFO ]: Found error trace [2018-06-22 04:13:28,359 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:13:28,359 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:13:28,359 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 3 times [2018-06-22 04:13:28,359 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:13:28,359 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:13:28,360 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:13:28,360 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 04:13:28,360 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:13:28,576 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:13:28,995 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:13:28,995 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:13:28,995 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 04:13:29,007 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 04:13:29,141 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 04:13:29,141 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:13:29,152 INFO ]: Computing forward predicates... [2018-06-22 04:13:33,607 WARN ]: Spent 808.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 50 [2018-06-22 04:13:36,035 WARN ]: Spent 160.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 28 [2018-06-22 04:13:36,441 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:13:36,475 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 04:13:36,475 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-06-22 04:13:36,475 INFO ]: Interpolant automaton has 14 states [2018-06-22 04:13:36,476 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-22 04:13:36,476 INFO ]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-06-22 04:13:36,476 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 14 states. [2018-06-22 04:13:36,729 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:13:36,729 INFO ]: Finished difference Result 17 states and 17 transitions. [2018-06-22 04:13:36,729 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 04:13:36,729 INFO ]: Start accepts. Automaton has 14 states. Word has length 12 [2018-06-22 04:13:36,729 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:13:36,730 INFO ]: With dead ends: 17 [2018-06-22 04:13:36,730 INFO ]: Without dead ends: 17 [2018-06-22 04:13:36,730 INFO ]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2018-06-22 04:13:36,730 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 04:13:36,732 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 04:13:36,732 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 04:13:36,732 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-06-22 04:13:36,733 INFO ]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 12 [2018-06-22 04:13:36,733 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:13:36,733 INFO ]: Abstraction has 17 states and 17 transitions. [2018-06-22 04:13:36,733 INFO ]: Interpolant automaton has 14 states. [2018-06-22 04:13:36,733 INFO ]: Start isEmpty. Operand 17 states and 17 transitions. [2018-06-22 04:13:36,733 INFO ]: Finished isEmpty. Found accepting run of length 17 [2018-06-22 04:13:36,733 INFO ]: Found error trace [2018-06-22 04:13:36,733 INFO ]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:13:36,733 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:13:36,734 INFO ]: Analyzing trace with hash -1752374252, now seen corresponding path program 4 times [2018-06-22 04:13:36,734 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:13:36,734 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:13:36,734 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:13:36,734 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 04:13:36,734 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:13:37,232 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:13:37,682 WARN ]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 04:13:38,041 WARN ]: Spent 306.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 6 [2018-06-22 04:13:38,414 INFO ]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:13:38,414 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:13:38,414 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 04:13:38,421 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 04:13:38,619 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 04:13:38,619 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:13:38,637 INFO ]: Computing forward predicates... [2018-06-22 04:13:39,488 WARN ]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2018-06-22 04:13:40,073 WARN ]: Spent 152.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 47 [2018-06-22 04:13:40,473 WARN ]: Spent 169.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 45 [2018-06-22 04:13:40,978 WARN ]: Spent 163.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 43 [2018-06-22 04:13:41,589 WARN ]: Spent 370.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 41 [2018-06-22 04:13:42,391 WARN ]: Spent 102.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 31 [2018-06-22 04:13:42,694 INFO ]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:13:42,719 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 04:13:42,720 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2018-06-22 04:13:42,720 INFO ]: Interpolant automaton has 22 states [2018-06-22 04:13:42,720 INFO ]: Constructing interpolant automaton starting with 22 interpolants. [2018-06-22 04:13:42,720 INFO ]: CoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2018-06-22 04:13:42,720 INFO ]: Start difference. First operand 17 states and 17 transitions. Second operand 22 states. [2018-06-22 04:13:43,225 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:13:43,225 INFO ]: Finished difference Result 23 states and 23 transitions. [2018-06-22 04:13:43,225 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-06-22 04:13:43,225 INFO ]: Start accepts. Automaton has 22 states. Word has length 16 [2018-06-22 04:13:43,225 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:13:43,226 INFO ]: With dead ends: 23 [2018-06-22 04:13:43,226 INFO ]: Without dead ends: 23 [2018-06-22 04:13:43,227 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=283, Invalid=529, Unknown=0, NotChecked=0, Total=812 [2018-06-22 04:13:43,227 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 04:13:43,230 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 04:13:43,230 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 04:13:43,231 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-06-22 04:13:43,231 INFO ]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 16 [2018-06-22 04:13:43,231 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:13:43,231 INFO ]: Abstraction has 23 states and 23 transitions. [2018-06-22 04:13:43,231 INFO ]: Interpolant automaton has 22 states. [2018-06-22 04:13:43,231 INFO ]: Start isEmpty. Operand 23 states and 23 transitions. [2018-06-22 04:13:43,232 INFO ]: Finished isEmpty. Found accepting run of length 23 [2018-06-22 04:13:43,232 INFO ]: Found error trace [2018-06-22 04:13:43,232 INFO ]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:13:43,232 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:13:43,232 INFO ]: Analyzing trace with hash -1558576876, now seen corresponding path program 5 times [2018-06-22 04:13:43,232 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:13:43,232 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:13:43,233 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:13:43,233 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 04:13:43,233 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:13:44,365 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:13:45,116 WARN ]: Spent 209.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 6 [2018-06-22 04:13:45,490 WARN ]: Spent 323.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 6 [2018-06-22 04:13:45,706 WARN ]: Spent 136.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 10 [2018-06-22 04:13:46,125 WARN ]: Spent 121.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 12 [2018-06-22 04:13:46,310 WARN ]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 11 [2018-06-22 04:13:46,672 WARN ]: Spent 225.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 11 [2018-06-22 04:13:46,713 INFO ]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:13:46,713 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:13:46,713 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 04:13:46,719 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 04:13:47,177 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-06-22 04:13:47,177 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:13:47,201 INFO ]: Computing forward predicates... [2018-06-22 04:13:49,655 WARN ]: Spent 141.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 26 [2018-06-22 04:13:50,838 WARN ]: Spent 133.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 20 [2018-06-22 04:13:51,219 WARN ]: Spent 132.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 17 [2018-06-22 04:13:51,520 WARN ]: Spent 133.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 18 [2018-06-22 04:13:51,983 WARN ]: Spent 131.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 18 [2018-06-22 04:13:52,315 WARN ]: Spent 131.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 18 [2018-06-22 04:13:52,575 WARN ]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 18 [2018-06-22 04:13:53,377 WARN ]: Spent 186.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 18 [2018-06-22 04:13:53,813 WARN ]: Spent 116.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 18 [2018-06-22 04:13:54,133 INFO ]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:13:54,157 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 04:13:54,157 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2018-06-22 04:13:54,157 INFO ]: Interpolant automaton has 34 states [2018-06-22 04:13:54,157 INFO ]: Constructing interpolant automaton starting with 34 interpolants. [2018-06-22 04:13:54,158 INFO ]: CoverageRelationStatistics Valid=169, Invalid=953, Unknown=0, NotChecked=0, Total=1122 [2018-06-22 04:13:54,158 INFO ]: Start difference. First operand 23 states and 23 transitions. Second operand 34 states. [2018-06-22 04:13:54,342 WARN ]: Spent 137.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2018-06-22 04:13:54,557 WARN ]: Spent 198.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2018-06-22 04:13:54,854 WARN ]: Spent 278.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2018-06-22 04:13:55,074 WARN ]: Spent 198.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2018-06-22 04:13:55,288 WARN ]: Spent 192.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2018-06-22 04:13:55,431 WARN ]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2018-06-22 04:13:55,581 WARN ]: Spent 124.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2018-06-22 04:13:55,742 WARN ]: Spent 135.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2018-06-22 04:13:56,481 WARN ]: Spent 136.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2018-06-22 04:13:56,483 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:13:56,483 INFO ]: Finished difference Result 24 states and 24 transitions. [2018-06-22 04:13:56,483 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-06-22 04:13:56,483 INFO ]: Start accepts. Automaton has 34 states. Word has length 22 [2018-06-22 04:13:56,483 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:13:56,483 INFO ]: With dead ends: 24 [2018-06-22 04:13:56,483 INFO ]: Without dead ends: 24 [2018-06-22 04:13:56,485 INFO ]: 0 DeclaredPredicates, 54 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=571, Invalid=1781, Unknown=0, NotChecked=0, Total=2352 [2018-06-22 04:13:56,492 INFO ]: Start minimizeSevpa. Operand 24 states. [2018-06-22 04:13:56,494 INFO ]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-06-22 04:13:56,494 INFO ]: Start removeUnreachable. Operand 24 states. [2018-06-22 04:13:56,494 INFO ]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-06-22 04:13:56,494 INFO ]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-06-22 04:13:56,495 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:13:56,495 INFO ]: Abstraction has 24 states and 24 transitions. [2018-06-22 04:13:56,495 INFO ]: Interpolant automaton has 34 states. [2018-06-22 04:13:56,495 INFO ]: Start isEmpty. Operand 24 states and 24 transitions. [2018-06-22 04:13:56,495 INFO ]: Finished isEmpty. Found accepting run of length 24 [2018-06-22 04:13:56,495 INFO ]: Found error trace [2018-06-22 04:13:56,495 INFO ]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:13:56,495 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:13:56,495 INFO ]: Analyzing trace with hash -1073125364, now seen corresponding path program 6 times [2018-06-22 04:13:56,495 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:13:56,495 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:13:56,496 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:13:56,496 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 04:13:56,496 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:13:57,432 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:13:59,698 WARN ]: Spent 723.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 25 [2018-06-22 04:14:00,126 WARN ]: Spent 399.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 60 [2018-06-22 04:14:00,645 WARN ]: Spent 495.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 95 [2018-06-22 04:14:01,592 WARN ]: Spent 913.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 121 [2018-06-22 04:14:02,350 WARN ]: Spent 711.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 117 [2018-06-22 04:14:03,301 WARN ]: Spent 848.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 127 [2018-06-22 04:14:04,542 WARN ]: Spent 1.15 s on a formula simplification. DAG size of input: 198 DAG size of output: 130 [2018-06-22 04:14:04,967 WARN ]: Spent 348.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 37 [2018-06-22 04:14:05,628 WARN ]: Spent 403.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 32 [2018-06-22 04:14:05,992 WARN ]: Spent 256.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 30 [2018-06-22 04:14:06,275 WARN ]: Spent 175.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 25 [2018-06-22 04:14:06,593 WARN ]: Spent 256.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 17 [2018-06-22 04:14:06,668 INFO ]: Checked inductivity of 136 backedges. 15 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:14:06,668 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:14:06,668 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 04:14:06,674 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 04:14:07,606 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-06-22 04:14:07,606 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:14:07,640 INFO ]: Computing forward predicates... [2018-06-22 04:14:08,150 WARN ]: Spent 113.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2018-06-22 04:14:09,002 WARN ]: Spent 500.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 60 [2018-06-22 04:14:11,770 WARN ]: Spent 1.32 s on a formula simplification. DAG size of input: 211 DAG size of output: 79 [2018-06-22 04:14:17,589 WARN ]: Spent 3.37 s on a formula simplification. DAG size of input: 379 DAG size of output: 107 Received shutdown request... [2018-06-22 04:14:19,691 INFO ]: Timeout while computing interpolants [2018-06-22 04:14:19,891 WARN ]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 04:14:19,891 WARN ]: Verification canceled [2018-06-22 04:14:19,896 WARN ]: Timeout [2018-06-22 04:14:19,896 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 04:14:19 BoogieIcfgContainer [2018-06-22 04:14:19,896 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 04:14:19,897 INFO ]: Toolchain (without parser) took 56944.54 ms. Allocated memory was 306.7 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 247.3 MB in the beginning and 883.7 MB in the end (delta: -636.4 MB). Peak memory consumption was 533.3 MB. Max. memory is 3.6 GB. [2018-06-22 04:14:19,898 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 306.7 MB. Free memory is still 272.4 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 04:14:19,898 INFO ]: ChcToBoogie took 80.27 ms. Allocated memory is still 306.7 MB. Free memory was 246.3 MB in the beginning and 244.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 04:14:19,898 INFO ]: Boogie Preprocessor took 68.81 ms. Allocated memory is still 306.7 MB. Free memory was 244.3 MB in the beginning and 242.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 04:14:19,899 INFO ]: RCFGBuilder took 437.29 ms. Allocated memory is still 306.7 MB. Free memory was 242.3 MB in the beginning and 220.1 MB in the end (delta: 22.2 MB). Peak memory consumption was 22.2 MB. Max. memory is 3.6 GB. [2018-06-22 04:14:19,899 INFO ]: TraceAbstraction took 56347.47 ms. Allocated memory was 306.7 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 220.1 MB in the beginning and 883.7 MB in the end (delta: -663.6 MB). Peak memory consumption was 506.0 MB. Max. memory is 3.6 GB. [2018-06-22 04:14:19,901 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 306.7 MB. Free memory is still 272.4 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 80.27 ms. Allocated memory is still 306.7 MB. Free memory was 246.3 MB in the beginning and 244.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 68.81 ms. Allocated memory is still 306.7 MB. Free memory was 244.3 MB in the beginning and 242.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 437.29 ms. Allocated memory is still 306.7 MB. Free memory was 242.3 MB in the beginning and 220.1 MB in the end (delta: 22.2 MB). Peak memory consumption was 22.2 MB. Max. memory is 3.6 GB. * TraceAbstraction took 56347.47 ms. Allocated memory was 306.7 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 220.1 MB in the beginning and 883.7 MB in the end (delta: -663.6 MB). Peak memory consumption was 506.0 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 16, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 24 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 56.2s OverallTime, 7 OverallIterations, 16 TraceHistogramMax, 3.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 42 SDtfs, 23 SDslu, 221 SDs, 0 SdLazy, 89 SolverSat, 62 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 144 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 12.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=6, 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 2.9s SatisfiabilityAnalysisTime, 25.3s InterpolantComputationTime, 143 NumberOfCodeBlocks, 143 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 132 ConstructedInterpolants, 0 QuantifiedInterpolants, 26268 SizeOfPredicates, 19 NumberOfNonLiveVariables, 2622 ConjunctsInSsa, 289 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 0/374 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/array_max-2.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_04-14-19-911.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/array_max-2.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_04-14-19-911.csv Completed graceful shutdown