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/conc/szymanski_safe.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 00:42:31,320 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 00:42:31,322 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 00:42:31,335 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 00:42:31,335 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 00:42:31,336 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 00:42:31,337 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 00:42:31,341 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 00:42:31,342 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 00:42:31,344 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 00:42:31,345 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 00:42:31,345 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 00:42:31,346 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 00:42:31,347 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 00:42:31,348 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 00:42:31,351 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 00:42:31,353 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 00:42:31,363 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 00:42:31,364 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 00:42:31,365 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 00:42:31,366 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 00:42:31,371 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-06-25 00:42:31,378 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 00:42:31,378 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 00:42:31,379 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 00:42:31,379 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 00:42:31,380 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 00:42:31,380 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 00:42:31,383 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 00:42:31,403 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 00:42:31,403 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 00:42:31,404 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 00:42:31,406 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 00:42:31,407 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 00:42:31,407 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 00:42:31,408 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 00:42:31,408 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 00:42:31,408 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 00:42:31,408 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 00:42:31,408 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 00:42:31,409 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 00:42:31,409 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 00:42:31,409 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 00:42:31,409 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 00:42:31,409 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 00:42:31,409 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 00:42:31,410 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 00:42:31,411 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 00:42:31,411 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 00:42:31,411 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 00:42:31,413 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 00:42:31,413 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 00:42:31,454 INFO ]: Repository-Root is: /tmp [2018-06-25 00:42:31,472 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 00:42:31,475 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 00:42:31,478 INFO ]: Initializing SmtParser... [2018-06-25 00:42:31,478 INFO ]: SmtParser initialized [2018-06-25 00:42:31,479 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/conc/szymanski_safe.smt2 [2018-06-25 00:42:31,480 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 00:42:31,550 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/conc/szymanski_safe.smt2 unknown [2018-06-25 00:42:31,808 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/conc/szymanski_safe.smt2 [2018-06-25 00:42:31,812 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 00:42:31,818 INFO ]: Walking toolchain with 5 elements. [2018-06-25 00:42:31,818 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 00:42:31,818 INFO ]: Initializing ChcToBoogie... [2018-06-25 00:42:31,819 INFO ]: ChcToBoogie initialized [2018-06-25 00:42:31,822 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 12:42:31" (1/1) ... [2018-06-25 00:42:31,884 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:42:31 Unit [2018-06-25 00:42:31,885 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 00:42:31,885 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 00:42:31,885 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 00:42:31,885 INFO ]: Boogie Preprocessor initialized [2018-06-25 00:42:31,905 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:42:31" (1/1) ... [2018-06-25 00:42:31,905 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:42:31" (1/1) ... [2018-06-25 00:42:31,912 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:42:31" (1/1) ... [2018-06-25 00:42:31,912 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:42:31" (1/1) ... [2018-06-25 00:42:31,924 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:42:31" (1/1) ... [2018-06-25 00:42:31,926 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:42:31" (1/1) ... [2018-06-25 00:42:31,927 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:42:31" (1/1) ... [2018-06-25 00:42:31,932 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 00:42:31,933 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 00:42:31,933 INFO ]: Initializing RCFGBuilder... [2018-06-25 00:42:31,933 INFO ]: RCFGBuilder initialized [2018-06-25 00:42:31,934 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:42:31" (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 00:42:31,956 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 00:42:31,956 INFO ]: Found specification of procedure gotoProc [2018-06-25 00:42:31,956 INFO ]: Found implementation of procedure gotoProc [2018-06-25 00:42:31,956 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 00:42:31,956 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 00:42:31,956 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 00:42:32,238 INFO ]: Using library mode [2018-06-25 00:42:32,238 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 12:42:32 BoogieIcfgContainer [2018-06-25 00:42:32,238 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 00:42:32,239 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-25 00:42:32,239 INFO ]: Initializing BlockEncodingV2... [2018-06-25 00:42:32,240 INFO ]: BlockEncodingV2 initialized [2018-06-25 00:42:32,240 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 12:42:32" (1/1) ... [2018-06-25 00:42:32,257 INFO ]: Initial Icfg 10 locations, 10 edges [2018-06-25 00:42:32,258 INFO ]: Using Remove infeasible edges [2018-06-25 00:42:32,258 INFO ]: Using Maximize final states [2018-06-25 00:42:32,259 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-25 00:42:32,259 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-25 00:42:32,263 INFO ]: Using Remove sink states [2018-06-25 00:42:32,264 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-25 00:42:32,264 INFO ]: Using Use SBE [2018-06-25 00:42:32,272 WARN ]: expecting exponential blowup for input size 8 [2018-06-25 00:42:32,353 WARN ]: aborting because of expected exponential blowup for input size 40 [2018-06-25 00:42:32,354 INFO ]: SBE split 0 edges [2018-06-25 00:42:32,365 INFO ]: Removed 2 edges and 2 locations because of local infeasibility [2018-06-25 00:42:32,368 INFO ]: 0 new accepting states [2018-06-25 00:42:32,420 INFO ]: Removed 4 edges and 2 locations by large block encoding [2018-06-25 00:42:32,422 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-25 00:42:32,428 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-25 00:42:32,428 INFO ]: 0 new accepting states [2018-06-25 00:42:32,428 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-25 00:42:32,428 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-25 00:42:32,428 INFO ]: Encoded RCFG 6 locations, 6 edges [2018-06-25 00:42:32,429 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 25.06 12:42:32 BasicIcfg [2018-06-25 00:42:32,430 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-25 00:42:32,431 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 00:42:32,431 INFO ]: Initializing TraceAbstraction... [2018-06-25 00:42:32,436 INFO ]: TraceAbstraction initialized [2018-06-25 00:42:32,436 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 12:42:31" (1/4) ... [2018-06-25 00:42:32,437 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f9014d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 12:42:32, skipping insertion in model container [2018-06-25 00:42:32,437 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:42:31" (2/4) ... [2018-06-25 00:42:32,437 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f9014d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 12:42:32, skipping insertion in model container [2018-06-25 00:42:32,437 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 12:42:32" (3/4) ... [2018-06-25 00:42:32,437 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f9014d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 12:42:32, skipping insertion in model container [2018-06-25 00:42:32,438 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 25.06 12:42:32" (4/4) ... [2018-06-25 00:42:32,440 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-25 00:42:32,450 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 00:42:32,458 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 00:42:32,505 INFO ]: Using default assertion order modulation [2018-06-25 00:42:32,506 INFO ]: Interprodecural is true [2018-06-25 00:42:32,506 INFO ]: Hoare is false [2018-06-25 00:42:32,506 INFO ]: Compute interpolants for FPandBP [2018-06-25 00:42:32,506 INFO ]: Backedges is TWOTRACK [2018-06-25 00:42:32,506 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 00:42:32,506 INFO ]: Difference is false [2018-06-25 00:42:32,506 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 00:42:32,506 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 00:42:32,520 INFO ]: Start isEmpty. Operand 6 states. [2018-06-25 00:42:32,537 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-25 00:42:32,537 INFO ]: Found error trace [2018-06-25 00:42:32,539 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-25 00:42:32,539 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 00:42:32,545 INFO ]: Analyzing trace with hash 35402562, now seen corresponding path program 1 times [2018-06-25 00:42:32,547 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 00:42:32,548 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 00:42:32,595 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 00:42:32,595 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 00:42:32,595 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 00:42:32,651 INFO ]: Conjunction of SSA is unsat [2018-06-25 00:42:32,765 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 00:42:32,766 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 00:42:32,766 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 00:42:32,768 INFO ]: Interpolant automaton has 3 states [2018-06-25 00:42:32,780 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 00:42:32,781 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 00:42:32,783 INFO ]: Start difference. First operand 6 states. Second operand 3 states. [2018-06-25 00:42:32,839 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 00:42:32,839 INFO ]: Finished difference Result 7 states and 7 transitions. [2018-06-25 00:42:32,839 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 00:42:32,840 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-25 00:42:32,841 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 00:42:32,847 INFO ]: With dead ends: 7 [2018-06-25 00:42:32,847 INFO ]: Without dead ends: 7 [2018-06-25 00:42:32,849 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 00:42:32,863 INFO ]: Start minimizeSevpa. Operand 7 states. [2018-06-25 00:42:32,878 INFO ]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-06-25 00:42:32,879 INFO ]: Start removeUnreachable. Operand 7 states. [2018-06-25 00:42:32,879 INFO ]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-06-25 00:42:32,881 INFO ]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-06-25 00:42:32,881 INFO ]: Finished accepts. word is rejected. [2018-06-25 00:42:32,881 INFO ]: Abstraction has 7 states and 7 transitions. [2018-06-25 00:42:32,881 INFO ]: Interpolant automaton has 3 states. [2018-06-25 00:42:32,881 INFO ]: Start isEmpty. Operand 7 states and 7 transitions. [2018-06-25 00:42:32,882 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-25 00:42:32,882 INFO ]: Found error trace [2018-06-25 00:42:32,882 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-25 00:42:32,882 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 00:42:32,882 INFO ]: Analyzing trace with hash 1097183593, now seen corresponding path program 1 times [2018-06-25 00:42:32,882 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 00:42:32,882 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 00:42:32,883 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 00:42:32,883 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 00:42:32,883 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 00:42:32,954 INFO ]: Conjunction of SSA is unsat [2018-06-25 00:42:33,249 WARN ]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2018-06-25 00:42:33,249 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 00:42:33,250 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 00:42:33,250 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 00:42:33,264 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 00:42:33,323 INFO ]: Conjunction of SSA is unsat [2018-06-25 00:42:33,333 INFO ]: Computing forward predicates... [2018-06-25 00:42:34,291 WARN ]: Spent 290.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 9 [2018-06-25 00:42:34,294 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 00:42:34,314 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 00:42:34,314 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-25 00:42:34,315 INFO ]: Interpolant automaton has 6 states [2018-06-25 00:42:34,315 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 00:42:34,315 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-25 00:42:34,315 INFO ]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-06-25 00:42:34,378 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 00:42:34,378 INFO ]: Finished difference Result 8 states and 8 transitions. [2018-06-25 00:42:34,378 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-25 00:42:34,378 INFO ]: Start accepts. Automaton has 6 states. Word has length 6 [2018-06-25 00:42:34,378 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 00:42:34,379 INFO ]: With dead ends: 8 [2018-06-25 00:42:34,379 INFO ]: Without dead ends: 8 [2018-06-25 00:42:34,379 INFO ]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-06-25 00:42:34,380 INFO ]: Start minimizeSevpa. Operand 8 states. [2018-06-25 00:42:34,380 INFO ]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-06-25 00:42:34,380 INFO ]: Start removeUnreachable. Operand 8 states. [2018-06-25 00:42:34,381 INFO ]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-06-25 00:42:34,381 INFO ]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-06-25 00:42:34,381 INFO ]: Finished accepts. word is rejected. [2018-06-25 00:42:34,381 INFO ]: Abstraction has 8 states and 8 transitions. [2018-06-25 00:42:34,381 INFO ]: Interpolant automaton has 6 states. [2018-06-25 00:42:34,381 INFO ]: Start isEmpty. Operand 8 states and 8 transitions. [2018-06-25 00:42:34,381 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 00:42:34,381 INFO ]: Found error trace [2018-06-25 00:42:34,381 INFO ]: trace histogram [2, 1, 1, 1, 1, 1] [2018-06-25 00:42:34,381 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 00:42:34,381 INFO ]: Analyzing trace with hash -347342814, now seen corresponding path program 2 times [2018-06-25 00:42:34,382 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 00:42:34,382 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 00:42:34,382 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 00:42:34,382 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 00:42:34,382 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 00:42:34,440 INFO ]: Conjunction of SSA is unsat [2018-06-25 00:42:34,676 WARN ]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-25 00:42:34,677 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 00:42:34,677 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 00:42:34,677 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 00:42:34,683 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 00:42:34,739 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 00:42:34,739 INFO ]: Conjunction of SSA is unsat [2018-06-25 00:42:34,743 INFO ]: Computing forward predicates... [2018-06-25 00:42:35,335 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 00:42:38,602 WARN ]: Simplifying disjunction of 8704 conjuctions. This might take some time... [2018-06-25 00:42:44,543 INFO ]: Simplified to disjunction of 8704 conjuctions. [2018-06-25 00:42:44,662 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 00:42:44,665 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 00:42:44,702 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 00:42:44,716 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 00:42:44,781 WARN ]: Simplifying disjunction of 8704 conjuctions. This might take some time... [2018-06-25 00:42:50,052 INFO ]: Simplified to disjunction of 8704 conjuctions. [2018-06-25 00:42:50,301 WARN ]: expecting exponential blowup for input size 12 [2018-06-25 00:43:03,151 WARN ]: Simplifying disjunction of 1114112 conjuctions. This might take some time... Received shutdown request... [2018-06-25 00:43:31,953 INFO ]: Timeout while computing interpolants [2018-06-25 00:43:32,154 WARN ]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 00:43:32,154 WARN ]: Verification canceled [2018-06-25 00:43:32,156 INFO ]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-06-25 00:43:32,157 WARN ]: Timeout [2018-06-25 00:43:32,157 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 12:43:32 BasicIcfg [2018-06-25 00:43:32,157 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 00:43:32,158 INFO ]: Toolchain (without parser) took 60345.36 ms. Allocated memory was 307.8 MB in the beginning and 2.2 GB in the end (delta: 1.9 GB). Free memory was 260.2 MB in the beginning and 975.4 MB in the end (delta: -715.3 MB). Peak memory consumption was 1.9 GB. Max. memory is 3.6 GB. [2018-06-25 00:43:32,159 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 307.8 MB. Free memory is still 273.2 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 00:43:32,159 INFO ]: ChcToBoogie took 66.65 ms. Allocated memory is still 307.8 MB. Free memory was 259.2 MB in the beginning and 257.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 00:43:32,160 INFO ]: Boogie Preprocessor took 46.93 ms. Allocated memory is still 307.8 MB. Free memory was 257.2 MB in the beginning and 256.2 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-25 00:43:32,160 INFO ]: RCFGBuilder took 305.58 ms. Allocated memory is still 307.8 MB. Free memory was 256.2 MB in the beginning and 244.2 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. [2018-06-25 00:43:32,161 INFO ]: BlockEncodingV2 took 191.23 ms. Allocated memory is still 307.8 MB. Free memory was 244.2 MB in the beginning and 235.2 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 3.6 GB. [2018-06-25 00:43:32,164 INFO ]: TraceAbstraction took 59726.06 ms. Allocated memory was 307.8 MB in the beginning and 2.2 GB in the end (delta: 1.9 GB). Free memory was 235.2 MB in the beginning and 975.4 MB in the end (delta: -740.2 MB). Peak memory consumption was 1.9 GB. Max. memory is 3.6 GB. [2018-06-25 00:43:32,168 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, 6 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 307.8 MB. Free memory is still 273.2 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 66.65 ms. Allocated memory is still 307.8 MB. Free memory was 259.2 MB in the beginning and 257.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 46.93 ms. Allocated memory is still 307.8 MB. Free memory was 257.2 MB in the beginning and 256.2 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 305.58 ms. Allocated memory is still 307.8 MB. Free memory was 256.2 MB in the beginning and 244.2 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. * BlockEncodingV2 took 191.23 ms. Allocated memory is still 307.8 MB. Free memory was 244.2 MB in the beginning and 235.2 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 59726.06 ms. Allocated memory was 307.8 MB in the beginning and 2.2 GB in the end (delta: 1.9 GB). Free memory was 235.2 MB in the beginning and 975.4 MB in the end (delta: -740.2 MB). Peak memory consumption was 1.9 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 8 with TraceHistMax 2, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while DnfTransformerHelper was XNF transformer was simplifying 1114112 conjuctions. . - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 6 locations, 1 error locations. TIMEOUT Result, 59.6s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 10 SDtfs, 0 SDslu, 9 SDs, 0 SdLazy, 8 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8occurred in iteration=2, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 146 SizeOfPredicates, 8 NumberOfNonLiveVariables, 100 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 0/2 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/szymanski_safe.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-0-2018-06-25_00-43-32-187.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/szymanski_safe.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-1-2018-06-25_00-43-32-187.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/szymanski_safe.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-Benchmark-0-2018-06-25_00-43-32-187.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/szymanski_safe.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_00-43-32-187.csv Completed graceful shutdown