java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/ctigar/substring1.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 05:59:36,200 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 05:59:36,204 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 05:59:36,220 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 05:59:36,221 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 05:59:36,222 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 05:59:36,224 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 05:59:36,228 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 05:59:36,229 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 05:59:36,232 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 05:59:36,233 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 05:59:36,233 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 05:59:36,236 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 05:59:36,238 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 05:59:36,238 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 05:59:36,239 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 05:59:36,252 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 05:59:36,254 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 05:59:36,255 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 05:59:36,256 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 05:59:36,258 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 05:59:36,264 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 05:59:36,265 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 05:59:36,265 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 05:59:36,266 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 05:59:36,267 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 05:59:36,268 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 05:59:36,271 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 05:59:36,272 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 05:59:36,272 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 05:59:36,273 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 05:59:36,280 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 05:59:36,280 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 05:59:36,281 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 05:59:36,282 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 05:59:36,282 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 05:59:36,299 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 05:59:36,299 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 05:59:36,300 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 05:59:36,300 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 05:59:36,303 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 05:59:36,306 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 05:59:36,307 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 05:59:36,307 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 05:59:36,307 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:59:36,307 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 05:59:36,307 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 05:59:36,308 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 05:59:36,308 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 05:59:36,308 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 05:59:36,308 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 05:59:36,308 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 05:59:36,308 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 05:59:36,311 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 05:59:36,311 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 05:59:36,360 INFO ]: Repository-Root is: /tmp [2018-06-22 05:59:36,378 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 05:59:36,383 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 05:59:36,385 INFO ]: Initializing SmtParser... [2018-06-22 05:59:36,385 INFO ]: SmtParser initialized [2018-06-22 05:59:36,386 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/substring1.c.smt2 [2018-06-22 05:59:36,387 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-22 05:59:36,466 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/substring1.c.smt2 unknown [2018-06-22 05:59:36,832 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/substring1.c.smt2 [2018-06-22 05:59:36,858 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 05:59:36,864 INFO ]: Walking toolchain with 4 elements. [2018-06-22 05:59:36,865 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 05:59:36,865 INFO ]: Initializing ChcToBoogie... [2018-06-22 05:59:36,865 INFO ]: ChcToBoogie initialized [2018-06-22 05:59:36,868 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:59:36" (1/1) ... [2018-06-22 05:59:36,953 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:59:36 Unit [2018-06-22 05:59:36,953 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 05:59:36,954 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 05:59:36,954 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 05:59:36,954 INFO ]: Boogie Preprocessor initialized [2018-06-22 05:59:36,975 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:59:36" (1/1) ... [2018-06-22 05:59:36,975 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:59:36" (1/1) ... [2018-06-22 05:59:36,981 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:59:36" (1/1) ... [2018-06-22 05:59:36,981 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:59:36" (1/1) ... [2018-06-22 05:59:36,987 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:59:36" (1/1) ... [2018-06-22 05:59:36,988 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:59:36" (1/1) ... [2018-06-22 05:59:36,997 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:59:36" (1/1) ... [2018-06-22 05:59:36,999 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 05:59:37,000 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 05:59:37,000 INFO ]: Initializing RCFGBuilder... [2018-06-22 05:59:37,000 INFO ]: RCFGBuilder initialized [2018-06-22 05:59:37,001 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:59:36" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-22 05:59:37,014 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 05:59:37,014 INFO ]: Found specification of procedure gotoProc [2018-06-22 05:59:37,014 INFO ]: Found implementation of procedure gotoProc [2018-06-22 05:59:37,014 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 05:59:37,014 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 05:59:37,014 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:59:37,246 INFO ]: Using library mode [2018-06-22 05:59:37,256 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:59:37 BoogieIcfgContainer [2018-06-22 05:59:37,256 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 05:59:37,257 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 05:59:37,257 INFO ]: Initializing TraceAbstraction... [2018-06-22 05:59:37,261 INFO ]: TraceAbstraction initialized [2018-06-22 05:59:37,261 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:59:36" (1/3) ... [2018-06-22 05:59:37,262 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a294d33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:59:37, skipping insertion in model container [2018-06-22 05:59:37,262 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:59:36" (2/3) ... [2018-06-22 05:59:37,262 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a294d33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:59:37, skipping insertion in model container [2018-06-22 05:59:37,262 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:59:37" (3/3) ... [2018-06-22 05:59:37,264 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 05:59:37,293 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 05:59:37,303 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 05:59:37,364 INFO ]: Using default assertion order modulation [2018-06-22 05:59:37,364 INFO ]: Interprodecural is true [2018-06-22 05:59:37,364 INFO ]: Hoare is false [2018-06-22 05:59:37,364 INFO ]: Compute interpolants for FPandBP [2018-06-22 05:59:37,365 INFO ]: Backedges is TWOTRACK [2018-06-22 05:59:37,365 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 05:59:37,365 INFO ]: Difference is false [2018-06-22 05:59:37,365 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 05:59:37,365 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 05:59:37,382 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 05:59:37,396 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 05:59:37,396 INFO ]: Found error trace [2018-06-22 05:59:37,397 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:59:37,398 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:59:37,405 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-22 05:59:37,407 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:59:37,408 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:59:37,445 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:59:37,445 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:59:37,445 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:59:37,498 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:59:37,596 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:59:37,599 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 05:59:37,599 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 05:59:37,601 INFO ]: Interpolant automaton has 3 states [2018-06-22 05:59:37,620 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 05:59:37,621 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:59:37,624 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 05:59:37,707 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:59:37,707 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 05:59:37,707 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 05:59:37,709 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 05:59:37,709 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:59:37,717 INFO ]: With dead ends: 9 [2018-06-22 05:59:37,717 INFO ]: Without dead ends: 9 [2018-06-22 05:59:37,718 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:59:37,731 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 05:59:37,750 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 05:59:37,751 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 05:59:37,751 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 05:59:37,752 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 05:59:37,752 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:59:37,752 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 05:59:37,752 INFO ]: Interpolant automaton has 3 states. [2018-06-22 05:59:37,752 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 05:59:37,753 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 05:59:37,753 INFO ]: Found error trace [2018-06-22 05:59:37,753 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:59:37,753 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:59:37,753 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-22 05:59:37,753 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:59:37,753 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:59:37,754 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:59:37,754 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:59:37,754 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:59:37,817 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:59:37,924 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:59:37,924 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:59:37,924 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:59:37,938 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:59:38,002 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:59:38,014 INFO ]: Computing forward predicates... [2018-06-22 05:59:38,595 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:59:38,621 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:59:38,621 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 05:59:38,622 INFO ]: Interpolant automaton has 5 states [2018-06-22 05:59:38,622 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 05:59:38,622 INFO ]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-06-22 05:59:38,622 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 05:59:38,675 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:59:38,675 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 05:59:38,675 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 05:59:38,675 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 05:59:38,676 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:59:38,676 INFO ]: With dead ends: 10 [2018-06-22 05:59:38,676 INFO ]: Without dead ends: 10 [2018-06-22 05:59:38,677 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-06-22 05:59:38,677 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 05:59:38,678 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 05:59:38,678 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 05:59:38,678 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 05:59:38,678 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 05:59:38,678 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:59:38,678 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 05:59:38,678 INFO ]: Interpolant automaton has 5 states. [2018-06-22 05:59:38,678 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 05:59:38,679 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 05:59:38,679 INFO ]: Found error trace [2018-06-22 05:59:38,679 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:59:38,679 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:59:38,679 INFO ]: Analyzing trace with hash -2043975570, now seen corresponding path program 2 times [2018-06-22 05:59:38,679 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:59:38,679 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:59:38,681 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:59:38,681 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:59:38,681 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:59:38,741 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:59:38,944 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:59:38,944 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:59:38,944 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) [2018-06-22 05:59:38,959 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:59:39,046 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:59:39,046 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:59:39,050 INFO ]: Computing forward predicates... [2018-06-22 05:59:40,861 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:59:40,894 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:59:40,894 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-22 05:59:40,895 INFO ]: Interpolant automaton has 6 states [2018-06-22 05:59:40,895 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 05:59:40,895 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:59:40,895 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-22 05:59:41,167 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:59:41,167 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 05:59:41,168 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 05:59:41,168 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-22 05:59:41,168 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:59:41,168 INFO ]: With dead ends: 11 [2018-06-22 05:59:41,168 INFO ]: Without dead ends: 11 [2018-06-22 05:59:41,168 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-06-22 05:59:41,169 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 05:59:41,170 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 05:59:41,170 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 05:59:41,170 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 05:59:41,170 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-22 05:59:41,170 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:59:41,170 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 05:59:41,170 INFO ]: Interpolant automaton has 6 states. [2018-06-22 05:59:41,170 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 05:59:41,171 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 05:59:41,171 INFO ]: Found error trace [2018-06-22 05:59:41,171 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:59:41,171 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:59:41,171 INFO ]: Analyzing trace with hash 1062095287, now seen corresponding path program 3 times [2018-06-22 05:59:41,171 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:59:41,171 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:59:41,172 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:59:41,172 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:59:41,172 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:59:41,214 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:59:41,777 WARN ]: Spent 388.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2018-06-22 05:59:41,908 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:59:41,909 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:59:41,929 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:59:41,936 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 05:59:42,001 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 05:59:42,001 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:59:42,005 INFO ]: Computing forward predicates... [2018-06-22 05:59:47,067 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:59:47,090 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:59:47,091 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-22 05:59:47,091 INFO ]: Interpolant automaton has 7 states [2018-06-22 05:59:47,091 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 05:59:47,091 INFO ]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-06-22 05:59:47,091 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-06-22 05:59:47,200 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:59:47,200 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 05:59:47,200 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 05:59:47,200 INFO ]: Start accepts. Automaton has 7 states. Word has length 10 [2018-06-22 05:59:47,200 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:59:47,201 INFO ]: With dead ends: 12 [2018-06-22 05:59:47,201 INFO ]: Without dead ends: 12 [2018-06-22 05:59:47,201 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2018-06-22 05:59:47,201 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 05:59:47,203 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 05:59:47,203 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 05:59:47,203 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 05:59:47,203 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-22 05:59:47,203 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:59:47,203 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 05:59:47,203 INFO ]: Interpolant automaton has 7 states. [2018-06-22 05:59:47,203 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 05:59:47,204 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 05:59:47,204 INFO ]: Found error trace [2018-06-22 05:59:47,204 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:59:47,204 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:59:47,204 INFO ]: Analyzing trace with hash -1433955954, now seen corresponding path program 4 times [2018-06-22 05:59:47,204 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:59:47,204 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:59:47,205 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:59:47,205 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:59:47,205 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:59:47,288 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:59:47,502 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:59:47,502 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:59:47,502 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:59:47,510 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 05:59:47,585 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 05:59:47,585 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:59:47,589 INFO ]: Computing forward predicates... [2018-06-22 06:00:01,100 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 06:00:01,121 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 06:00:01,121 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-06-22 06:00:01,122 INFO ]: Interpolant automaton has 8 states [2018-06-22 06:00:01,122 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 06:00:01,122 INFO ]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-06-22 06:00:01,122 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 8 states. [2018-06-22 06:00:01,257 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 06:00:01,257 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 06:00:01,257 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 06:00:01,257 INFO ]: Start accepts. Automaton has 8 states. Word has length 11 [2018-06-22 06:00:01,257 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 06:00:01,257 INFO ]: With dead ends: 13 [2018-06-22 06:00:01,257 INFO ]: Without dead ends: 13 [2018-06-22 06:00:01,257 INFO ]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-06-22 06:00:01,257 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 06:00:01,259 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 06:00:01,259 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 06:00:01,259 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 06:00:01,259 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-22 06:00:01,259 INFO ]: Finished accepts. word is rejected. [2018-06-22 06:00:01,259 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 06:00:01,259 INFO ]: Interpolant automaton has 8 states. [2018-06-22 06:00:01,259 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 06:00:01,260 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 06:00:01,260 INFO ]: Found error trace [2018-06-22 06:00:01,260 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 06:00:01,260 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 06:00:01,260 INFO ]: Analyzing trace with hash -1502133097, now seen corresponding path program 5 times [2018-06-22 06:00:01,260 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 06:00:01,260 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 06:00:01,261 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 06:00:01,261 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 06:00:01,261 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 06:00:01,310 INFO ]: Conjunction of SSA is unsat [2018-06-22 06:00:02,375 WARN ]: Spent 850.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 10 [2018-06-22 06:00:02,976 WARN ]: Spent 519.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 11 [2018-06-22 06:00:03,103 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 06:00:03,104 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 06:00:03,104 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 06:00:03,117 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 06:00:03,218 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-22 06:00:03,218 INFO ]: Conjunction of SSA is unsat [2018-06-22 06:00:03,223 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-22 06:00:42,650 INFO ]: Timeout while computing interpolants [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (7)] Forcibly destroying the process [2018-06-22 06:00:42,851 WARN ]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 06:00:42,851 WARN ]: Verification canceled [2018-06-22 06:00:43,034 WARN ]: Timeout [2018-06-22 06:00:43,034 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 06:00:43 BoogieIcfgContainer [2018-06-22 06:00:43,034 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 06:00:43,043 INFO ]: Toolchain (without parser) took 66184.34 ms. Allocated memory was 300.4 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 250.8 MB in the beginning and 447.1 MB in the end (delta: -196.3 MB). Peak memory consumption was 1.4 GB. Max. memory is 3.6 GB. [2018-06-22 06:00:43,044 INFO ]: SmtParser took 0.09 ms. Allocated memory is still 300.4 MB. Free memory is still 263.9 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 06:00:43,044 INFO ]: ChcToBoogie took 88.38 ms. Allocated memory is still 300.4 MB. Free memory was 250.8 MB in the beginning and 248.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 06:00:43,045 INFO ]: Boogie Preprocessor took 45.71 ms. Allocated memory is still 300.4 MB. Free memory was 248.8 MB in the beginning and 246.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 06:00:43,045 INFO ]: RCFGBuilder took 255.99 ms. Allocated memory is still 300.4 MB. Free memory was 246.8 MB in the beginning and 236.7 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 3.6 GB. [2018-06-22 06:00:43,046 INFO ]: TraceAbstraction took 65776.92 ms. Allocated memory was 300.4 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 236.7 MB in the beginning and 447.1 MB in the end (delta: -210.4 MB). Peak memory consumption was 1.4 GB. Max. memory is 3.6 GB. [2018-06-22 06:00:43,049 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.09 ms. Allocated memory is still 300.4 MB. Free memory is still 263.9 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 88.38 ms. Allocated memory is still 300.4 MB. Free memory was 250.8 MB in the beginning and 248.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 45.71 ms. Allocated memory is still 300.4 MB. Free memory was 248.8 MB in the beginning and 246.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 255.99 ms. Allocated memory is still 300.4 MB. Free memory was 246.8 MB in the beginning and 236.7 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 3.6 GB. * TraceAbstraction took 65776.92 ms. Allocated memory was 300.4 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 236.7 MB in the beginning and 447.1 MB in the end (delta: -210.4 MB). Peak memory consumption was 1.4 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 13 with TraceHistMax 5, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while XnfDer was eliminating 46091 quantified variables from 16 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 65.6s OverallTime, 6 OverallIterations, 5 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 35 SDtfs, 6 SDslu, 69 SDs, 0 SdLazy, 32 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 10 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=5, 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, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 22.2s InterpolantComputationTime, 83 NumberOfCodeBlocks, 83 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 74 ConstructedInterpolants, 0 QuantifiedInterpolants, 2154 SizeOfPredicates, 20 NumberOfNonLiveVariables, 604 ConjunctsInSsa, 121 ConjunctsInUnsatCore, 9 InterpolantComputations, 1 PerfectInterpolantSequences, 0/40 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/substring1.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_06-00-43-092.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/substring1.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_06-00-43-092.csv Completed graceful shutdown