java -Xss4m -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC_wBE.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/ctigar/hsort.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-62c3406-m [2018-06-26 21:32:20,632 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-26 21:32:20,634 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-26 21:32:20,645 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-26 21:32:20,646 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-26 21:32:20,647 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-26 21:32:20,648 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-26 21:32:20,652 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-26 21:32:20,653 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-26 21:32:20,656 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-26 21:32:20,657 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-26 21:32:20,657 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-26 21:32:20,658 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-26 21:32:20,658 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-26 21:32:20,661 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-26 21:32:20,662 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-26 21:32:20,663 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-26 21:32:20,672 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-26 21:32:20,674 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-26 21:32:20,675 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-26 21:32:20,676 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-26 21:32:20,677 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-26 21:32:20,681 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-26 21:32:20,682 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-26 21:32:20,682 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-26 21:32:20,683 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-26 21:32:20,687 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-26 21:32:20,687 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-26 21:32:20,688 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-26 21:32:20,689 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-26 21:32:20,689 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-26 21:32:20,689 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-26 21:32:20,693 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-06-26 21:32:20,693 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-26 21:32:20,694 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-26 21:32:20,695 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-26 21:32:20,695 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-26 21:32:20,716 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-26 21:32:20,716 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-26 21:32:20,716 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-26 21:32:20,716 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-26 21:32:20,717 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-26 21:32:20,718 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-26 21:32:20,718 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-26 21:32:20,718 INFO L133 SettingsManager]: * Use SBE=true [2018-06-26 21:32:20,718 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-26 21:32:20,718 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-26 21:32:20,719 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-26 21:32:20,721 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-26 21:32:20,722 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-26 21:32:20,722 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-26 21:32:20,722 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-26 21:32:20,722 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-26 21:32:20,722 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-26 21:32:20,723 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-26 21:32:20,723 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-26 21:32:20,723 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-26 21:32:20,723 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-26 21:32:20,726 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-26 21:32:20,726 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-26 21:32:20,770 INFO ]: Repository-Root is: /tmp [2018-06-26 21:32:20,785 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-26 21:32:20,790 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-26 21:32:20,792 INFO ]: Initializing SmtParser... [2018-06-26 21:32:20,792 INFO ]: SmtParser initialized [2018-06-26 21:32:20,793 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/hsort.c.smt2 [2018-06-26 21:32:20,794 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 [2018-06-26 21:32:20,885 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/hsort.c.smt2 unknown [2018-06-26 21:32:21,353 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/hsort.c.smt2 [2018-06-26 21:32:21,358 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-26 21:32:21,365 INFO ]: Walking toolchain with 5 elements. [2018-06-26 21:32:21,365 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-26 21:32:21,365 INFO ]: Initializing ChcToBoogie... [2018-06-26 21:32:21,365 INFO ]: ChcToBoogie initialized [2018-06-26 21:32:21,369 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 26.06 09:32:21" (1/1) ... [2018-06-26 21:32:21,427 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:32:21 Unit [2018-06-26 21:32:21,427 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-26 21:32:21,428 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-26 21:32:21,428 INFO ]: Initializing Boogie Preprocessor... [2018-06-26 21:32:21,428 INFO ]: Boogie Preprocessor initialized [2018-06-26 21:32:21,449 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:32:21" (1/1) ... [2018-06-26 21:32:21,449 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:32:21" (1/1) ... [2018-06-26 21:32:21,470 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:32:21" (1/1) ... [2018-06-26 21:32:21,471 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:32:21" (1/1) ... [2018-06-26 21:32:21,479 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:32:21" (1/1) ... [2018-06-26 21:32:21,489 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:32:21" (1/1) ... [2018-06-26 21:32:21,492 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:32:21" (1/1) ... [2018-06-26 21:32:21,495 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-26 21:32:21,496 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-26 21:32:21,496 INFO ]: Initializing RCFGBuilder... [2018-06-26 21:32:21,496 INFO ]: RCFGBuilder initialized [2018-06-26 21:32:21,496 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:32:21" (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) [2018-06-26 21:32:21,524 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-26 21:32:21,524 INFO ]: Found specification of procedure gotoProc [2018-06-26 21:32:21,524 INFO ]: Found implementation of procedure gotoProc [2018-06-26 21:32:21,524 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-26 21:32:21,524 INFO ]: Found specification of procedure Ultimate.START [2018-06-26 21:32:21,524 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 [2018-06-26 21:32:21,791 INFO ]: Using library mode [2018-06-26 21:32:21,791 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 09:32:21 BoogieIcfgContainer [2018-06-26 21:32:21,791 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-26 21:32:21,792 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-26 21:32:21,792 INFO ]: Initializing BlockEncodingV2... [2018-06-26 21:32:21,793 INFO ]: BlockEncodingV2 initialized [2018-06-26 21:32:21,793 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 09:32:21" (1/1) ... [2018-06-26 21:32:21,808 INFO ]: Initial Icfg 10 locations, 10 edges [2018-06-26 21:32:21,809 INFO ]: Using Remove infeasible edges [2018-06-26 21:32:21,810 INFO ]: Using Maximize final states [2018-06-26 21:32:21,810 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-26 21:32:21,810 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-26 21:32:21,812 INFO ]: Using Remove sink states [2018-06-26 21:32:21,813 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-26 21:32:21,813 INFO ]: Using Use SBE [2018-06-26 21:32:21,817 WARN ]: expecting exponential blowup for input size 7 [2018-06-26 21:32:21,861 WARN ]: aborting because of expected exponential blowup for input size 90 [2018-06-26 21:32:21,876 WARN ]: aborting because of expected exponential blowup for input size 90 [2018-06-26 21:32:21,877 INFO ]: SBE split 1 edges [2018-06-26 21:32:21,882 INFO ]: Removed 2 edges and 2 locations because of local infeasibility [2018-06-26 21:32:21,883 INFO ]: 0 new accepting states [2018-06-26 21:32:22,018 INFO ]: Removed 9 edges and 2 locations by large block encoding [2018-06-26 21:32:22,020 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-26 21:32:22,022 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-26 21:32:22,022 INFO ]: 0 new accepting states [2018-06-26 21:32:22,022 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-26 21:32:22,022 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-26 21:32:22,022 INFO ]: Encoded RCFG 6 locations, 11 edges [2018-06-26 21:32:22,024 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 26.06 09:32:22 BasicIcfg [2018-06-26 21:32:22,024 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-26 21:32:22,025 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-26 21:32:22,025 INFO ]: Initializing TraceAbstraction... [2018-06-26 21:32:22,029 INFO ]: TraceAbstraction initialized [2018-06-26 21:32:22,030 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 26.06 09:32:21" (1/4) ... [2018-06-26 21:32:22,031 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16717fb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 26.06 09:32:22, skipping insertion in model container [2018-06-26 21:32:22,031 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:32:21" (2/4) ... [2018-06-26 21:32:22,031 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16717fb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.06 09:32:22, skipping insertion in model container [2018-06-26 21:32:22,031 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 09:32:21" (3/4) ... [2018-06-26 21:32:22,031 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16717fb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.06 09:32:22, skipping insertion in model container [2018-06-26 21:32:22,031 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 26.06 09:32:22" (4/4) ... [2018-06-26 21:32:22,033 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-26 21:32:22,044 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-26 21:32:22,050 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-26 21:32:22,092 INFO ]: Using default assertion order modulation [2018-06-26 21:32:22,092 INFO ]: Interprodecural is true [2018-06-26 21:32:22,092 INFO ]: Hoare is false [2018-06-26 21:32:22,093 INFO ]: Compute interpolants for FPandBP [2018-06-26 21:32:22,093 INFO ]: Backedges is TWOTRACK [2018-06-26 21:32:22,093 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-26 21:32:22,093 INFO ]: Difference is false [2018-06-26 21:32:22,093 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-26 21:32:22,093 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-26 21:32:22,107 INFO ]: Start isEmpty. Operand 6 states. [2018-06-26 21:32:22,121 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-26 21:32:22,122 INFO ]: Found error trace [2018-06-26 21:32:22,122 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-26 21:32:22,123 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:32:22,128 INFO ]: Analyzing trace with hash 35591879, now seen corresponding path program 1 times [2018-06-26 21:32:22,130 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:32:22,130 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:32:22,166 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:32:22,166 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:32:22,166 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:32:22,208 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:32:22,284 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:32:22,285 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 21:32:22,285 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-26 21:32:22,287 INFO ]: Interpolant automaton has 3 states [2018-06-26 21:32:22,297 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-26 21:32:22,297 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 21:32:22,299 INFO ]: Start difference. First operand 6 states. Second operand 3 states. [2018-06-26 21:32:22,387 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:32:22,388 INFO ]: Finished difference Result 7 states and 12 transitions. [2018-06-26 21:32:22,388 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-26 21:32:22,389 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-26 21:32:22,389 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:32:22,402 INFO ]: With dead ends: 7 [2018-06-26 21:32:22,403 INFO ]: Without dead ends: 7 [2018-06-26 21:32:22,404 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 [2018-06-26 21:32:22,419 INFO ]: Start minimizeSevpa. Operand 7 states. [2018-06-26 21:32:22,438 INFO ]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-06-26 21:32:22,439 INFO ]: Start removeUnreachable. Operand 7 states. [2018-06-26 21:32:22,439 INFO ]: Finished removeUnreachable. Reduced from 7 states to 7 states and 12 transitions. [2018-06-26 21:32:22,440 INFO ]: Start accepts. Automaton has 7 states and 12 transitions. Word has length 5 [2018-06-26 21:32:22,443 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:32:22,443 INFO ]: Abstraction has 7 states and 12 transitions. [2018-06-26 21:32:22,443 INFO ]: Interpolant automaton has 3 states. [2018-06-26 21:32:22,443 INFO ]: Start isEmpty. Operand 7 states and 12 transitions. [2018-06-26 21:32:22,443 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-26 21:32:22,443 INFO ]: Found error trace [2018-06-26 21:32:22,443 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-26 21:32:22,443 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:32:22,443 INFO ]: Analyzing trace with hash 1102735290, now seen corresponding path program 1 times [2018-06-26 21:32:22,443 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:32:22,443 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:32:22,444 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:32:22,444 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:32:22,444 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:32:22,519 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:32:22,682 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:32:22,682 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 21:32:22,682 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) [2018-06-26 21:32:22,691 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-26 21:32:22,767 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:32:22,775 INFO ]: Computing forward predicates... [2018-06-26 21:32:23,443 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:32:23,476 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 21:32:23,476 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-26 21:32:23,477 INFO ]: Interpolant automaton has 5 states [2018-06-26 21:32:23,477 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-26 21:32:23,477 INFO ]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-26 21:32:23,477 INFO ]: Start difference. First operand 7 states and 12 transitions. Second operand 5 states. [2018-06-26 21:32:23,872 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:32:23,872 INFO ]: Finished difference Result 9 states and 14 transitions. [2018-06-26 21:32:23,873 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-26 21:32:23,873 INFO ]: Start accepts. Automaton has 5 states. Word has length 6 [2018-06-26 21:32:23,873 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:32:23,873 INFO ]: With dead ends: 9 [2018-06-26 21:32:23,873 INFO ]: Without dead ends: 9 [2018-06-26 21:32:23,874 INFO ]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-26 21:32:23,874 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-26 21:32:23,875 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 8. [2018-06-26 21:32:23,875 INFO ]: Start removeUnreachable. Operand 8 states. [2018-06-26 21:32:23,876 INFO ]: Finished removeUnreachable. Reduced from 8 states to 8 states and 13 transitions. [2018-06-26 21:32:23,876 INFO ]: Start accepts. Automaton has 8 states and 13 transitions. Word has length 6 [2018-06-26 21:32:23,876 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:32:23,876 INFO ]: Abstraction has 8 states and 13 transitions. [2018-06-26 21:32:23,876 INFO ]: Interpolant automaton has 5 states. [2018-06-26 21:32:23,876 INFO ]: Start isEmpty. Operand 8 states and 13 transitions. [2018-06-26 21:32:23,876 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-26 21:32:23,876 INFO ]: Found error trace [2018-06-26 21:32:23,876 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-26 21:32:23,876 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:32:23,877 INFO ]: Analyzing trace with hash 1103658811, now seen corresponding path program 1 times [2018-06-26 21:32:23,877 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:32:23,877 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:32:23,878 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:32:23,879 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:32:23,879 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:32:23,918 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:32:24,094 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:32:24,094 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 21:32:24,094 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 [2018-06-26 21:32:24,107 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:32:24,156 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:32:24,159 INFO ]: Computing forward predicates... [2018-06-26 21:32:25,196 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:32:25,216 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 21:32:25,216 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-26 21:32:25,216 INFO ]: Interpolant automaton has 5 states [2018-06-26 21:32:25,216 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-26 21:32:25,216 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-26 21:32:25,217 INFO ]: Start difference. First operand 8 states and 13 transitions. Second operand 5 states. [2018-06-26 21:32:25,456 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:32:25,456 INFO ]: Finished difference Result 12 states and 17 transitions. [2018-06-26 21:32:25,457 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-26 21:32:25,457 INFO ]: Start accepts. Automaton has 5 states. Word has length 6 [2018-06-26 21:32:25,457 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:32:25,457 INFO ]: With dead ends: 12 [2018-06-26 21:32:25,457 INFO ]: Without dead ends: 12 [2018-06-26 21:32:25,458 INFO ]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-26 21:32:25,458 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-26 21:32:25,460 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 8. [2018-06-26 21:32:25,460 INFO ]: Start removeUnreachable. Operand 8 states. [2018-06-26 21:32:25,460 INFO ]: Finished removeUnreachable. Reduced from 8 states to 8 states and 13 transitions. [2018-06-26 21:32:25,460 INFO ]: Start accepts. Automaton has 8 states and 13 transitions. Word has length 6 [2018-06-26 21:32:25,460 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:32:25,460 INFO ]: Abstraction has 8 states and 13 transitions. [2018-06-26 21:32:25,460 INFO ]: Interpolant automaton has 5 states. [2018-06-26 21:32:25,461 INFO ]: Start isEmpty. Operand 8 states and 13 transitions. [2018-06-26 21:32:25,461 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-26 21:32:25,461 INFO ]: Found error trace [2018-06-26 21:32:25,461 INFO ]: trace histogram [2, 1, 1, 1, 1, 1] [2018-06-26 21:32:25,461 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:32:25,461 INFO ]: Analyzing trace with hash -175557337, now seen corresponding path program 2 times [2018-06-26 21:32:25,461 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:32:25,461 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:32:25,462 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:32:25,462 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:32:25,462 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:32:25,530 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:32:25,772 WARN ]: Spent 133.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2018-06-26 21:32:25,782 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:32:25,782 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 21:32:25,782 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 [2018-06-26 21:32:25,789 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-26 21:32:25,854 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-26 21:32:25,854 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:32:25,857 INFO ]: Computing forward predicates... [2018-06-26 21:32:28,885 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:32:28,916 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 21:32:28,916 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-26 21:32:28,916 INFO ]: Interpolant automaton has 6 states [2018-06-26 21:32:28,916 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-26 21:32:28,917 INFO ]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-26 21:32:28,917 INFO ]: Start difference. First operand 8 states and 13 transitions. Second operand 6 states. [2018-06-26 21:32:29,473 WARN ]: Spent 292.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 11 [2018-06-26 21:32:29,513 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:32:29,513 INFO ]: Finished difference Result 12 states and 17 transitions. [2018-06-26 21:32:29,513 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-26 21:32:29,513 INFO ]: Start accepts. Automaton has 6 states. Word has length 7 [2018-06-26 21:32:29,513 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:32:29,514 INFO ]: With dead ends: 12 [2018-06-26 21:32:29,514 INFO ]: Without dead ends: 12 [2018-06-26 21:32:29,514 INFO ]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-06-26 21:32:29,514 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-26 21:32:29,515 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 9. [2018-06-26 21:32:29,515 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-26 21:32:29,516 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 14 transitions. [2018-06-26 21:32:29,516 INFO ]: Start accepts. Automaton has 9 states and 14 transitions. Word has length 7 [2018-06-26 21:32:29,516 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:32:29,516 INFO ]: Abstraction has 9 states and 14 transitions. [2018-06-26 21:32:29,516 INFO ]: Interpolant automaton has 6 states. [2018-06-26 21:32:29,516 INFO ]: Start isEmpty. Operand 9 states and 14 transitions. [2018-06-26 21:32:29,516 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-26 21:32:29,516 INFO ]: Found error trace [2018-06-26 21:32:29,516 INFO ]: trace histogram [2, 1, 1, 1, 1, 1] [2018-06-26 21:32:29,516 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:32:29,516 INFO ]: Analyzing trace with hash -146928186, now seen corresponding path program 2 times [2018-06-26 21:32:29,516 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:32:29,516 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:32:29,517 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:32:29,517 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-26 21:32:29,517 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:32:29,553 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:32:29,703 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:32:29,703 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 21:32:29,704 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 [2018-06-26 21:32:29,713 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-26 21:32:29,792 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-26 21:32:29,792 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:32:29,796 INFO ]: Computing forward predicates... [2018-06-26 21:32:36,609 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:32:36,632 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 21:32:36,632 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-26 21:32:36,632 INFO ]: Interpolant automaton has 6 states [2018-06-26 21:32:36,633 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-26 21:32:36,633 INFO ]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-26 21:32:36,633 INFO ]: Start difference. First operand 9 states and 14 transitions. Second operand 6 states. [2018-06-26 21:32:36,698 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:32:36,698 INFO ]: Finished difference Result 15 states and 20 transitions. [2018-06-26 21:32:36,699 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-26 21:32:36,699 INFO ]: Start accepts. Automaton has 6 states. Word has length 7 [2018-06-26 21:32:36,699 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:32:36,700 INFO ]: With dead ends: 15 [2018-06-26 21:32:36,700 INFO ]: Without dead ends: 15 [2018-06-26 21:32:36,700 INFO ]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2018-06-26 21:32:36,700 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-26 21:32:36,701 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 9. [2018-06-26 21:32:36,701 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-26 21:32:36,702 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 14 transitions. [2018-06-26 21:32:36,702 INFO ]: Start accepts. Automaton has 9 states and 14 transitions. Word has length 7 [2018-06-26 21:32:36,702 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:32:36,702 INFO ]: Abstraction has 9 states and 14 transitions. [2018-06-26 21:32:36,702 INFO ]: Interpolant automaton has 6 states. [2018-06-26 21:32:36,702 INFO ]: Start isEmpty. Operand 9 states and 14 transitions. [2018-06-26 21:32:36,702 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-26 21:32:36,702 INFO ]: Found error trace [2018-06-26 21:32:36,702 INFO ]: trace histogram [2, 1, 1, 1, 1, 1] [2018-06-26 21:32:36,702 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:32:36,702 INFO ]: Analyzing trace with hash -118299035, now seen corresponding path program 1 times [2018-06-26 21:32:36,702 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:32:36,702 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:32:36,703 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:32:36,703 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-26 21:32:36,703 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:32:36,737 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:32:37,400 WARN ]: Spent 461.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2018-06-26 21:32:37,637 WARN ]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-26 21:32:37,637 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:32:37,637 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 21:32:37,637 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) [2018-06-26 21:32:37,653 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-26 21:32:37,710 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:32:37,713 INFO ]: Computing forward predicates... [2018-06-26 21:32:43,353 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:32:43,372 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 21:32:43,372 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-26 21:32:43,372 INFO ]: Interpolant automaton has 6 states [2018-06-26 21:32:43,373 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-26 21:32:43,373 INFO ]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-26 21:32:43,373 INFO ]: Start difference. First operand 9 states and 14 transitions. Second operand 6 states. [2018-06-26 21:32:43,474 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:32:43,474 INFO ]: Finished difference Result 15 states and 20 transitions. [2018-06-26 21:32:43,475 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-26 21:32:43,475 INFO ]: Start accepts. Automaton has 6 states. Word has length 7 [2018-06-26 21:32:43,475 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:32:43,476 INFO ]: With dead ends: 15 [2018-06-26 21:32:43,476 INFO ]: Without dead ends: 15 [2018-06-26 21:32:43,476 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-06-26 21:32:43,476 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-26 21:32:43,477 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 9. [2018-06-26 21:32:43,477 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-26 21:32:43,478 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 14 transitions. [2018-06-26 21:32:43,478 INFO ]: Start accepts. Automaton has 9 states and 14 transitions. Word has length 7 [2018-06-26 21:32:43,478 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:32:43,478 INFO ]: Abstraction has 9 states and 14 transitions. [2018-06-26 21:32:43,478 INFO ]: Interpolant automaton has 6 states. [2018-06-26 21:32:43,478 INFO ]: Start isEmpty. Operand 9 states and 14 transitions. [2018-06-26 21:32:43,478 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-26 21:32:43,478 INFO ]: Found error trace [2018-06-26 21:32:43,478 INFO ]: trace histogram [3, 1, 1, 1, 1, 1] [2018-06-26 21:32:43,478 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:32:43,478 INFO ]: Analyzing trace with hash -1147923110, now seen corresponding path program 3 times [2018-06-26 21:32:43,478 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:32:43,478 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:32:43,487 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:32:43,487 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:32:43,487 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:32:43,555 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:32:43,828 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:32:43,828 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 21:32:43,828 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 [2018-06-26 21:32:43,835 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-26 21:32:43,917 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-26 21:32:43,917 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:32:43,919 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-26 21:33:29,440 INFO ]: Timeout while computing interpolants [2018-06-26 21:33:29,641 WARN ]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-26 21:33:29,641 WARN ]: Verification canceled [2018-06-26 21:33:29,643 INFO ]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-06-26 21:33:29,644 WARN ]: Timeout [2018-06-26 21:33:29,644 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.06 09:33:29 BasicIcfg [2018-06-26 21:33:29,644 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-26 21:33:29,645 INFO ]: Toolchain (without parser) took 68286.56 ms. Allocated memory was 303.6 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 245.9 MB in the beginning and 1.1 GB in the end (delta: -837.6 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-26 21:33:29,646 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 303.6 MB. Free memory is still 269.0 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-26 21:33:29,646 INFO ]: ChcToBoogie took 62.09 ms. Allocated memory is still 303.6 MB. Free memory was 245.9 MB in the beginning and 242.9 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-26 21:33:29,647 INFO ]: Boogie Preprocessor took 67.51 ms. Allocated memory is still 303.6 MB. Free memory was 242.9 MB in the beginning and 241.9 MB in the end (delta: 996.3 kB). Peak memory consumption was 996.3 kB. Max. memory is 3.6 GB. [2018-06-26 21:33:29,647 INFO ]: RCFGBuilder took 295.74 ms. Allocated memory is still 303.6 MB. Free memory was 241.9 MB in the beginning and 225.0 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 3.6 GB. [2018-06-26 21:33:29,648 INFO ]: BlockEncodingV2 took 232.00 ms. Allocated memory is still 303.6 MB. Free memory was 224.0 MB in the beginning and 213.0 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 3.6 GB. [2018-06-26 21:33:29,648 INFO ]: TraceAbstraction took 67618.92 ms. Allocated memory was 303.6 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 213.0 MB in the beginning and 1.1 GB in the end (delta: -870.5 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-26 21:33:29,652 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 10 locations, 10 edges - StatisticsResult: Encoded RCFG 6 locations, 11 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 303.6 MB. Free memory is still 269.0 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 62.09 ms. Allocated memory is still 303.6 MB. Free memory was 245.9 MB in the beginning and 242.9 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 67.51 ms. Allocated memory is still 303.6 MB. Free memory was 242.9 MB in the beginning and 241.9 MB in the end (delta: 996.3 kB). Peak memory consumption was 996.3 kB. Max. memory is 3.6 GB. * RCFGBuilder took 295.74 ms. Allocated memory is still 303.6 MB. Free memory was 241.9 MB in the beginning and 225.0 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 3.6 GB. * BlockEncodingV2 took 232.00 ms. Allocated memory is still 303.6 MB. Free memory was 224.0 MB in the beginning and 213.0 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 67618.92 ms. Allocated memory was 303.6 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 213.0 MB in the beginning and 1.1 GB in the end (delta: -870.5 MB). 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 Cancelled while BasicCegarLoop was analyzing trace of length 9 with TraceHistMax 3, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 21 quantified variables from 23 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 6 locations, 1 error locations. TIMEOUT Result, 67.5s OverallTime, 7 OverallIterations, 3 TraceHistogramMax, 1.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 60 SDtfs, 0 SDslu, 51 SDs, 0 SdLazy, 62 SolverSat, 61 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=4, 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, 20 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 18.9s InterpolantComputationTime, 71 NumberOfCodeBlocks, 71 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 60 ConstructedInterpolants, 0 QuantifiedInterpolants, 1067 SizeOfPredicates, 30 NumberOfNonLiveVariables, 1070 ConjunctsInSsa, 107 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 0/22 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/hsort.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-0-2018-06-26_21-33-29-672.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/hsort.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-1-2018-06-26_21-33-29-672.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/hsort.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-Benchmark-0-2018-06-26_21-33-29-672.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/hsort.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-26_21-33-29-672.csv Completed graceful shutdown