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/sendmail-close-angle.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 01:23:08,834 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 01:23:08,836 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 01:23:08,850 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 01:23:08,850 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 01:23:08,851 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 01:23:08,852 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 01:23:08,855 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 01:23:08,856 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 01:23:08,858 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 01:23:08,859 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 01:23:08,859 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 01:23:08,860 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 01:23:08,861 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 01:23:08,862 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 01:23:08,865 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 01:23:08,867 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 01:23:08,876 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 01:23:08,878 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 01:23:08,878 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 01:23:08,880 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 01:23:08,885 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-06-25 01:23:08,891 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 01:23:08,892 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 01:23:08,893 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 01:23:08,896 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 01:23:08,897 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 01:23:08,897 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 01:23:08,898 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 01:23:08,916 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 01:23:08,919 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 01:23:08,920 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 01:23:08,920 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 01:23:08,921 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 01:23:08,921 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 01:23:08,921 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 01:23:08,921 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 01:23:08,922 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 01:23:08,922 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 01:23:08,922 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 01:23:08,922 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 01:23:08,922 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 01:23:08,922 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 01:23:08,923 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 01:23:08,923 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 01:23:08,923 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 01:23:08,923 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 01:23:08,923 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 01:23:08,923 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 01:23:08,924 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 01:23:08,926 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 01:23:08,926 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 01:23:08,971 INFO ]: Repository-Root is: /tmp [2018-06-25 01:23:08,987 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 01:23:08,991 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 01:23:08,993 INFO ]: Initializing SmtParser... [2018-06-25 01:23:08,993 INFO ]: SmtParser initialized [2018-06-25 01:23:08,994 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/sendmail-close-angle.c.smt2 [2018-06-25 01:23:08,995 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 [2018-06-25 01:23:09,079 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/sendmail-close-angle.c.smt2 unknown [2018-06-25 01:23:09,489 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/sendmail-close-angle.c.smt2 [2018-06-25 01:23:09,496 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 01:23:09,503 INFO ]: Walking toolchain with 5 elements. [2018-06-25 01:23:09,504 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 01:23:09,504 INFO ]: Initializing ChcToBoogie... [2018-06-25 01:23:09,504 INFO ]: ChcToBoogie initialized [2018-06-25 01:23:09,507 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:23:09" (1/1) ... [2018-06-25 01:23:09,576 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:23:09 Unit [2018-06-25 01:23:09,577 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 01:23:09,577 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 01:23:09,577 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 01:23:09,577 INFO ]: Boogie Preprocessor initialized [2018-06-25 01:23:09,602 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:23:09" (1/1) ... [2018-06-25 01:23:09,602 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:23:09" (1/1) ... [2018-06-25 01:23:09,609 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:23:09" (1/1) ... [2018-06-25 01:23:09,609 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:23:09" (1/1) ... [2018-06-25 01:23:09,625 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:23:09" (1/1) ... [2018-06-25 01:23:09,627 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:23:09" (1/1) ... [2018-06-25 01:23:09,632 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:23:09" (1/1) ... [2018-06-25 01:23:09,634 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 01:23:09,635 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 01:23:09,635 INFO ]: Initializing RCFGBuilder... [2018-06-25 01:23:09,635 INFO ]: RCFGBuilder initialized [2018-06-25 01:23:09,636 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:23:09" (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) [2018-06-25 01:23:09,663 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 01:23:09,663 INFO ]: Found specification of procedure gotoProc [2018-06-25 01:23:09,663 INFO ]: Found implementation of procedure gotoProc [2018-06-25 01:23:09,663 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 01:23:09,663 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 01:23:09,663 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 [2018-06-25 01:23:09,936 INFO ]: Using library mode [2018-06-25 01:23:09,936 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:23:09 BoogieIcfgContainer [2018-06-25 01:23:09,936 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 01:23:09,937 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-25 01:23:09,937 INFO ]: Initializing BlockEncodingV2... [2018-06-25 01:23:09,944 INFO ]: BlockEncodingV2 initialized [2018-06-25 01:23:09,945 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:23:09" (1/1) ... [2018-06-25 01:23:09,971 INFO ]: Initial Icfg 10 locations, 10 edges [2018-06-25 01:23:09,972 INFO ]: Using Remove infeasible edges [2018-06-25 01:23:09,973 INFO ]: Using Maximize final states [2018-06-25 01:23:09,973 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-25 01:23:09,973 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-25 01:23:09,975 INFO ]: Using Remove sink states [2018-06-25 01:23:09,976 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-25 01:23:09,976 INFO ]: Using Use SBE [2018-06-25 01:23:09,981 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 01:23:10,096 WARN ]: aborting because of expected exponential blowup for input size 62 [2018-06-25 01:23:10,104 WARN ]: aborting because of expected exponential blowup for input size 62 [2018-06-25 01:23:10,104 INFO ]: SBE split 1 edges [2018-06-25 01:23:10,117 INFO ]: Removed 2 edges and 2 locations because of local infeasibility [2018-06-25 01:23:10,119 INFO ]: 0 new accepting states [2018-06-25 01:23:10,260 INFO ]: Removed 11 edges and 2 locations by large block encoding [2018-06-25 01:23:10,262 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-25 01:23:10,263 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-25 01:23:10,264 INFO ]: 0 new accepting states [2018-06-25 01:23:10,264 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-25 01:23:10,264 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-25 01:23:10,264 INFO ]: Encoded RCFG 6 locations, 13 edges [2018-06-25 01:23:10,264 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 25.06 01:23:10 BasicIcfg [2018-06-25 01:23:10,264 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-25 01:23:10,266 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 01:23:10,266 INFO ]: Initializing TraceAbstraction... [2018-06-25 01:23:10,269 INFO ]: TraceAbstraction initialized [2018-06-25 01:23:10,269 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:23:09" (1/4) ... [2018-06-25 01:23:10,270 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38466d0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 01:23:10, skipping insertion in model container [2018-06-25 01:23:10,270 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:23:09" (2/4) ... [2018-06-25 01:23:10,271 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38466d0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 01:23:10, skipping insertion in model container [2018-06-25 01:23:10,271 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:23:09" (3/4) ... [2018-06-25 01:23:10,271 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38466d0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 01:23:10, skipping insertion in model container [2018-06-25 01:23:10,271 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 25.06 01:23:10" (4/4) ... [2018-06-25 01:23:10,273 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-25 01:23:10,284 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 01:23:10,294 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 01:23:10,345 INFO ]: Using default assertion order modulation [2018-06-25 01:23:10,346 INFO ]: Interprodecural is true [2018-06-25 01:23:10,346 INFO ]: Hoare is false [2018-06-25 01:23:10,346 INFO ]: Compute interpolants for FPandBP [2018-06-25 01:23:10,346 INFO ]: Backedges is TWOTRACK [2018-06-25 01:23:10,346 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 01:23:10,346 INFO ]: Difference is false [2018-06-25 01:23:10,346 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 01:23:10,346 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 01:23:10,355 INFO ]: Start isEmpty. Operand 6 states. [2018-06-25 01:23:10,368 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-25 01:23:10,368 INFO ]: Found error trace [2018-06-25 01:23:10,369 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-25 01:23:10,369 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:23:10,373 INFO ]: Analyzing trace with hash 35655305, now seen corresponding path program 1 times [2018-06-25 01:23:10,374 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:23:10,374 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:23:10,407 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:23:10,407 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:23:10,407 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:23:10,453 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:23:10,557 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:23:10,560 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 01:23:10,560 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 01:23:10,563 INFO ]: Interpolant automaton has 3 states [2018-06-25 01:23:10,577 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 01:23:10,578 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 01:23:10,581 INFO ]: Start difference. First operand 6 states. Second operand 3 states. [2018-06-25 01:23:10,642 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:23:10,642 INFO ]: Finished difference Result 7 states and 14 transitions. [2018-06-25 01:23:10,642 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 01:23:10,643 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-25 01:23:10,643 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:23:10,651 INFO ]: With dead ends: 7 [2018-06-25 01:23:10,651 INFO ]: Without dead ends: 7 [2018-06-25 01:23:10,653 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 [2018-06-25 01:23:10,672 INFO ]: Start minimizeSevpa. Operand 7 states. [2018-06-25 01:23:10,692 INFO ]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-06-25 01:23:10,693 INFO ]: Start removeUnreachable. Operand 7 states. [2018-06-25 01:23:10,693 INFO ]: Finished removeUnreachable. Reduced from 7 states to 7 states and 14 transitions. [2018-06-25 01:23:10,695 INFO ]: Start accepts. Automaton has 7 states and 14 transitions. Word has length 5 [2018-06-25 01:23:10,696 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:23:10,696 INFO ]: Abstraction has 7 states and 14 transitions. [2018-06-25 01:23:10,696 INFO ]: Interpolant automaton has 3 states. [2018-06-25 01:23:10,696 INFO ]: Start isEmpty. Operand 7 states and 14 transitions. [2018-06-25 01:23:10,696 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-25 01:23:10,696 INFO ]: Found error trace [2018-06-25 01:23:10,696 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-25 01:23:10,696 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:23:10,696 INFO ]: Analyzing trace with hash 35863842, now seen corresponding path program 1 times [2018-06-25 01:23:10,696 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:23:10,696 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:23:10,697 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:23:10,697 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:23:10,697 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:23:10,703 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:23:10,760 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:23:10,760 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 01:23:10,760 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 01:23:10,761 INFO ]: Interpolant automaton has 3 states [2018-06-25 01:23:10,761 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 01:23:10,762 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 01:23:10,762 INFO ]: Start difference. First operand 7 states and 14 transitions. Second operand 3 states. [2018-06-25 01:23:10,850 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:23:10,850 INFO ]: Finished difference Result 8 states and 15 transitions. [2018-06-25 01:23:10,851 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 01:23:10,851 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-25 01:23:10,851 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:23:10,851 INFO ]: With dead ends: 8 [2018-06-25 01:23:10,851 INFO ]: Without dead ends: 8 [2018-06-25 01:23:10,852 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 [2018-06-25 01:23:10,852 INFO ]: Start minimizeSevpa. Operand 8 states. [2018-06-25 01:23:10,853 INFO ]: Finished minimizeSevpa. Reduced states from 8 to 7. [2018-06-25 01:23:10,853 INFO ]: Start removeUnreachable. Operand 7 states. [2018-06-25 01:23:10,853 INFO ]: Finished removeUnreachable. Reduced from 7 states to 7 states and 14 transitions. [2018-06-25 01:23:10,854 INFO ]: Start accepts. Automaton has 7 states and 14 transitions. Word has length 5 [2018-06-25 01:23:10,854 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:23:10,854 INFO ]: Abstraction has 7 states and 14 transitions. [2018-06-25 01:23:10,854 INFO ]: Interpolant automaton has 3 states. [2018-06-25 01:23:10,854 INFO ]: Start isEmpty. Operand 7 states and 14 transitions. [2018-06-25 01:23:10,854 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-25 01:23:10,854 INFO ]: Found error trace [2018-06-25 01:23:10,854 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-25 01:23:10,854 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:23:10,854 INFO ]: Analyzing trace with hash 1104615967, now seen corresponding path program 1 times [2018-06-25 01:23:10,854 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:23:10,854 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:23:10,855 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:23:10,855 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:23:10,855 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:23:10,932 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:23:11,099 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:23:11,099 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:23:11,099 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 [2018-06-25 01:23:11,124 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:23:11,184 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:23:11,192 INFO ]: Computing forward predicates... [2018-06-25 01:23:13,714 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:23:13,748 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 01:23:13,748 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 01:23:13,748 INFO ]: Interpolant automaton has 5 states [2018-06-25 01:23:13,748 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 01:23:13,748 INFO ]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-25 01:23:13,749 INFO ]: Start difference. First operand 7 states and 14 transitions. Second operand 5 states. [2018-06-25 01:23:14,025 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:23:14,025 INFO ]: Finished difference Result 11 states and 18 transitions. [2018-06-25 01:23:14,026 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-25 01:23:14,027 INFO ]: Start accepts. Automaton has 5 states. Word has length 6 [2018-06-25 01:23:14,027 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:23:14,027 INFO ]: With dead ends: 11 [2018-06-25 01:23:14,027 INFO ]: Without dead ends: 11 [2018-06-25 01:23:14,027 INFO ]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-25 01:23:14,028 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-25 01:23:14,029 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 8. [2018-06-25 01:23:14,029 INFO ]: Start removeUnreachable. Operand 8 states. [2018-06-25 01:23:14,029 INFO ]: Finished removeUnreachable. Reduced from 8 states to 8 states and 15 transitions. [2018-06-25 01:23:14,029 INFO ]: Start accepts. Automaton has 8 states and 15 transitions. Word has length 6 [2018-06-25 01:23:14,029 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:23:14,029 INFO ]: Abstraction has 8 states and 15 transitions. [2018-06-25 01:23:14,029 INFO ]: Interpolant automaton has 5 states. [2018-06-25 01:23:14,029 INFO ]: Start isEmpty. Operand 8 states and 15 transitions. [2018-06-25 01:23:14,030 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-25 01:23:14,030 INFO ]: Found error trace [2018-06-25 01:23:14,030 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-25 01:23:14,030 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:23:14,030 INFO ]: Analyzing trace with hash 1105539488, now seen corresponding path program 1 times [2018-06-25 01:23:14,030 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:23:14,030 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:23:14,034 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:23:14,034 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:23:14,034 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:23:14,074 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:23:14,164 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:23:14,164 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:23:14,164 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 [2018-06-25 01:23:14,179 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:23:14,233 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:23:14,235 INFO ]: Computing forward predicates... [2018-06-25 01:23:15,486 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:23:15,504 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 01:23:15,504 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 01:23:15,504 INFO ]: Interpolant automaton has 5 states [2018-06-25 01:23:15,504 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 01:23:15,505 INFO ]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-25 01:23:15,505 INFO ]: Start difference. First operand 8 states and 15 transitions. Second operand 5 states. [2018-06-25 01:23:15,539 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:23:15,539 INFO ]: Finished difference Result 13 states and 20 transitions. [2018-06-25 01:23:15,539 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-25 01:23:15,539 INFO ]: Start accepts. Automaton has 5 states. Word has length 6 [2018-06-25 01:23:15,539 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:23:15,540 INFO ]: With dead ends: 13 [2018-06-25 01:23:15,540 INFO ]: Without dead ends: 13 [2018-06-25 01:23:15,540 INFO ]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-25 01:23:15,540 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-25 01:23:15,542 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 8. [2018-06-25 01:23:15,542 INFO ]: Start removeUnreachable. Operand 8 states. [2018-06-25 01:23:15,542 INFO ]: Finished removeUnreachable. Reduced from 8 states to 8 states and 15 transitions. [2018-06-25 01:23:15,542 INFO ]: Start accepts. Automaton has 8 states and 15 transitions. Word has length 6 [2018-06-25 01:23:15,542 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:23:15,542 INFO ]: Abstraction has 8 states and 15 transitions. [2018-06-25 01:23:15,542 INFO ]: Interpolant automaton has 5 states. [2018-06-25 01:23:15,542 INFO ]: Start isEmpty. Operand 8 states and 15 transitions. [2018-06-25 01:23:15,542 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 01:23:15,542 INFO ]: Found error trace [2018-06-25 01:23:15,542 INFO ]: trace histogram [2, 1, 1, 1, 1, 1] [2018-06-25 01:23:15,542 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:23:15,543 INFO ]: Analyzing trace with hash -117341879, now seen corresponding path program 2 times [2018-06-25 01:23:15,543 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:23:15,543 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:23:15,543 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:23:15,543 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:23:15,543 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:23:15,579 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:23:15,666 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:23:15,666 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:23:15,666 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 [2018-06-25 01:23:15,673 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 01:23:15,711 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 01:23:15,711 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:23:15,713 INFO ]: Computing forward predicates... [2018-06-25 01:23:24,046 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:23:24,065 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 01:23:24,065 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-25 01:23:24,066 INFO ]: Interpolant automaton has 6 states [2018-06-25 01:23:24,066 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 01:23:24,066 INFO ]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-25 01:23:24,066 INFO ]: Start difference. First operand 8 states and 15 transitions. Second operand 6 states. [2018-06-25 01:23:24,140 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:23:24,141 INFO ]: Finished difference Result 13 states and 20 transitions. [2018-06-25 01:23:24,142 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-25 01:23:24,142 INFO ]: Start accepts. Automaton has 6 states. Word has length 7 [2018-06-25 01:23:24,142 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:23:24,142 INFO ]: With dead ends: 13 [2018-06-25 01:23:24,143 INFO ]: Without dead ends: 13 [2018-06-25 01:23:24,143 INFO ]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2018-06-25 01:23:24,143 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-25 01:23:24,144 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 9. [2018-06-25 01:23:24,144 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 01:23:24,144 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 16 transitions. [2018-06-25 01:23:24,145 INFO ]: Start accepts. Automaton has 9 states and 16 transitions. Word has length 7 [2018-06-25 01:23:24,145 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:23:24,145 INFO ]: Abstraction has 9 states and 16 transitions. [2018-06-25 01:23:24,145 INFO ]: Interpolant automaton has 6 states. [2018-06-25 01:23:24,145 INFO ]: Start isEmpty. Operand 9 states and 16 transitions. [2018-06-25 01:23:24,145 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 01:23:24,145 INFO ]: Found error trace [2018-06-25 01:23:24,145 INFO ]: trace histogram [2, 1, 1, 1, 1, 1] [2018-06-25 01:23:24,145 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:23:24,145 INFO ]: Analyzing trace with hash -88712728, now seen corresponding path program 2 times [2018-06-25 01:23:24,145 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:23:24,145 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:23:24,146 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:23:24,146 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 01:23:24,146 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:23:24,188 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:23:24,280 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:23:24,280 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:23:24,280 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 [2018-06-25 01:23:24,293 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 01:23:24,324 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 01:23:24,324 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:23:24,326 INFO ]: Computing forward predicates... [2018-06-25 01:23:24,637 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 01:23:26,075 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:23:26,108 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 01:23:26,108 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-25 01:23:26,108 INFO ]: Interpolant automaton has 6 states [2018-06-25 01:23:26,108 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 01:23:26,108 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-25 01:23:26,108 INFO ]: Start difference. First operand 9 states and 16 transitions. Second operand 6 states. [2018-06-25 01:23:26,244 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:23:26,244 INFO ]: Finished difference Result 18 states and 25 transitions. [2018-06-25 01:23:26,244 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-25 01:23:26,244 INFO ]: Start accepts. Automaton has 6 states. Word has length 7 [2018-06-25 01:23:26,244 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:23:26,245 INFO ]: With dead ends: 18 [2018-06-25 01:23:26,245 INFO ]: Without dead ends: 18 [2018-06-25 01:23:26,245 INFO ]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-06-25 01:23:26,245 INFO ]: Start minimizeSevpa. Operand 18 states. [2018-06-25 01:23:26,246 INFO ]: Finished minimizeSevpa. Reduced states from 18 to 9. [2018-06-25 01:23:26,246 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 01:23:26,246 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 16 transitions. [2018-06-25 01:23:26,247 INFO ]: Start accepts. Automaton has 9 states and 16 transitions. Word has length 7 [2018-06-25 01:23:26,247 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:23:26,247 INFO ]: Abstraction has 9 states and 16 transitions. [2018-06-25 01:23:26,247 INFO ]: Interpolant automaton has 6 states. [2018-06-25 01:23:26,247 INFO ]: Start isEmpty. Operand 9 states and 16 transitions. [2018-06-25 01:23:26,247 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 01:23:26,247 INFO ]: Found error trace [2018-06-25 01:23:26,247 INFO ]: trace histogram [3, 1, 1, 1, 1, 1] [2018-06-25 01:23:26,247 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:23:26,247 INFO ]: Analyzing trace with hash 656670559, now seen corresponding path program 3 times [2018-06-25 01:23:26,247 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:23:26,247 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:23:26,248 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:23:26,248 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 01:23:26,248 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:23:26,297 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:23:26,623 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:23:26,623 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:23:26,623 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 [2018-06-25 01:23:26,629 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 01:23:26,703 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 01:23:26,703 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:23:26,706 INFO ]: Computing forward predicates... [2018-06-25 01:23:37,028 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 01:23:42,626 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:23:42,646 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 01:23:42,646 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-25 01:23:42,647 INFO ]: Interpolant automaton has 7 states [2018-06-25 01:23:42,647 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-25 01:23:42,647 INFO ]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-06-25 01:23:42,647 INFO ]: Start difference. First operand 9 states and 16 transitions. Second operand 7 states. [2018-06-25 01:23:42,769 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:23:42,770 INFO ]: Finished difference Result 15 states and 22 transitions. [2018-06-25 01:23:42,770 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-25 01:23:42,770 INFO ]: Start accepts. Automaton has 7 states. Word has length 8 [2018-06-25 01:23:42,770 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:23:42,770 INFO ]: With dead ends: 15 [2018-06-25 01:23:42,770 INFO ]: Without dead ends: 15 [2018-06-25 01:23:42,770 INFO ]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2018-06-25 01:23:42,770 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-25 01:23:42,772 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 10. [2018-06-25 01:23:42,772 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-25 01:23:42,772 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 17 transitions. [2018-06-25 01:23:42,772 INFO ]: Start accepts. Automaton has 10 states and 17 transitions. Word has length 8 [2018-06-25 01:23:42,772 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:23:42,772 INFO ]: Abstraction has 10 states and 17 transitions. [2018-06-25 01:23:42,772 INFO ]: Interpolant automaton has 7 states. [2018-06-25 01:23:42,772 INFO ]: Start isEmpty. Operand 10 states and 17 transitions. [2018-06-25 01:23:42,773 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 01:23:42,773 INFO ]: Found error trace [2018-06-25 01:23:42,773 INFO ]: trace histogram [3, 1, 1, 1, 1, 1] [2018-06-25 01:23:42,774 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:23:42,774 INFO ]: Analyzing trace with hash 1544174240, now seen corresponding path program 3 times [2018-06-25 01:23:42,774 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:23:42,774 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:23:42,774 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:23:42,774 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 01:23:42,774 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:23:42,810 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:23:43,704 WARN ]: Spent 715.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2018-06-25 01:23:43,742 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:23:43,742 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:23:43,742 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 [2018-06-25 01:23:43,748 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 01:23:43,801 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 01:23:43,801 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:23:43,803 INFO ]: Computing forward predicates... [2018-06-25 01:23:49,594 WARN ]: expecting exponential blowup for input size 10 [2018-06-25 01:23:50,026 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 01:23:50,095 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 01:23:50,247 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 01:23:50,599 WARN ]: expecting exponential blowup for input size 6 Received shutdown request... [2018-06-25 01:24:13,291 INFO ]: Timeout while computing interpolants [2018-06-25 01:24:13,492 WARN ]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 01:24:13,492 WARN ]: Verification canceled [2018-06-25 01:24:13,494 INFO ]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-06-25 01:24:13,495 WARN ]: Timeout [2018-06-25 01:24:13,495 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 01:24:13 BasicIcfg [2018-06-25 01:24:13,495 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 01:24:13,496 INFO ]: Toolchain (without parser) took 63999.18 ms. Allocated memory was 309.3 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 255.7 MB in the beginning and 909.0 MB in the end (delta: -653.3 MB). Peak memory consumption was 1.4 GB. Max. memory is 3.6 GB. [2018-06-25 01:24:13,497 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 309.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 01:24:13,497 INFO ]: ChcToBoogie took 73.20 ms. Allocated memory is still 309.3 MB. Free memory was 255.7 MB in the beginning and 251.7 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. [2018-06-25 01:24:13,498 INFO ]: Boogie Preprocessor took 56.97 ms. Allocated memory is still 309.3 MB. Free memory was 251.7 MB in the beginning and 249.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 01:24:13,498 INFO ]: RCFGBuilder took 301.78 ms. Allocated memory is still 309.3 MB. Free memory was 249.8 MB in the beginning and 235.8 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 3.6 GB. [2018-06-25 01:24:13,499 INFO ]: BlockEncodingV2 took 327.56 ms. Allocated memory is still 309.3 MB. Free memory was 235.8 MB in the beginning and 219.8 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 3.6 GB. [2018-06-25 01:24:13,499 INFO ]: TraceAbstraction took 63229.35 ms. Allocated memory was 309.3 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 219.8 MB in the beginning and 909.0 MB in the end (delta: -689.2 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 01:24:13,503 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, 13 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 309.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 73.20 ms. Allocated memory is still 309.3 MB. Free memory was 255.7 MB in the beginning and 251.7 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 56.97 ms. Allocated memory is still 309.3 MB. Free memory was 251.7 MB in the beginning and 249.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 301.78 ms. Allocated memory is still 309.3 MB. Free memory was 249.8 MB in the beginning and 235.8 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 3.6 GB. * BlockEncodingV2 took 327.56 ms. Allocated memory is still 309.3 MB. Free memory was 235.8 MB in the beginning and 219.8 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 63229.35 ms. Allocated memory was 309.3 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 219.8 MB in the beginning and 909.0 MB in the end (delta: -689.2 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 PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while XnfDer was eliminating 48390 quantified variables from 16 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 6 locations, 1 error locations. TIMEOUT Result, 63.1s OverallTime, 8 OverallIterations, 3 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 85 SDtfs, 0 SDslu, 48 SDs, 0 SdLazy, 95 SolverSat, 82 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 9 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred in iteration=7, 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, 7 MinimizatonAttempts, 27 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 30.7s InterpolantComputationTime, 78 NumberOfCodeBlocks, 78 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 66 ConstructedInterpolants, 0 QuantifiedInterpolants, 1226 SizeOfPredicates, 30 NumberOfNonLiveVariables, 918 ConjunctsInSsa, 115 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 0/28 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/sendmail-close-angle.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-0-2018-06-25_01-24-13-516.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/sendmail-close-angle.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-1-2018-06-25_01-24-13-516.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/sendmail-close-angle.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-Benchmark-0-2018-06-25_01-24-13-516.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/sendmail-close-angle.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_01-24-13-516.csv Completed graceful shutdown