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_No_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/cav12/s3_srvr_3.cil.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:20:36,714 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:20:36,716 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:20:36,728 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:20:36,728 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:20:36,729 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:20:36,730 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:20:36,732 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:20:36,734 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:20:36,734 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:20:36,735 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:20:36,735 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:20:36,736 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:20:36,737 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:20:36,738 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:20:36,739 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:20:36,741 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:20:36,743 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:20:36,744 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:20:36,745 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:20:36,746 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:20:36,749 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:20:36,749 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:20:36,749 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:20:36,750 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:20:36,751 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:20:36,752 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:20:36,753 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:20:36,754 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:20:36,754 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:20:36,755 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:20:36,756 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:20:36,756 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:20:36,757 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:20:36,758 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:20:36,758 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 14:20:36,772 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:20:36,772 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:20:36,773 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:20:36,773 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:20:36,774 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:20:36,775 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:20:36,775 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:20:36,775 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:20:36,776 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:20:36,776 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:20:36,776 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:20:36,776 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:20:36,777 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:20:36,777 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:20:36,777 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:20:36,778 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:20:36,778 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:20:36,778 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:20:36,778 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:20:36,780 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:20:36,780 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:20:36,824 INFO ]: Repository-Root is: /tmp [2018-06-22 14:20:36,839 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:20:36,844 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:20:36,846 INFO ]: Initializing SmtParser... [2018-06-22 14:20:36,846 INFO ]: SmtParser initialized [2018-06-22 14:20:36,847 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/s3_srvr_3.cil.smt2 [2018-06-22 14:20:36,848 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 14:20:36,938 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/s3_srvr_3.cil.smt2 unknown [2018-06-22 14:20:37,457 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/s3_srvr_3.cil.smt2 [2018-06-22 14:20:37,462 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:20:37,468 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:20:37,468 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:20:37,468 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:20:37,469 INFO ]: ChcToBoogie initialized [2018-06-22 14:20:37,472 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:20:37" (1/1) ... [2018-06-22 14:20:37,525 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:20:37 Unit [2018-06-22 14:20:37,525 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:20:37,526 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:20:37,526 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:20:37,526 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:20:37,546 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:20:37" (1/1) ... [2018-06-22 14:20:37,547 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:20:37" (1/1) ... [2018-06-22 14:20:37,558 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:20:37" (1/1) ... [2018-06-22 14:20:37,558 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:20:37" (1/1) ... [2018-06-22 14:20:37,573 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:20:37" (1/1) ... [2018-06-22 14:20:37,574 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:20:37" (1/1) ... [2018-06-22 14:20:37,578 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:20:37" (1/1) ... [2018-06-22 14:20:37,583 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:20:37,584 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:20:37,584 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:20:37,584 INFO ]: RCFGBuilder initialized [2018-06-22 14:20:37,585 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:20:37" (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 14:20:37,610 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:20:37,610 INFO ]: Found specification of procedure False [2018-06-22 14:20:37,610 INFO ]: Found implementation of procedure False [2018-06-22 14:20:37,610 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:20:37,610 INFO ]: Found specification of procedure state [2018-06-22 14:20:37,610 INFO ]: Found implementation of procedure state [2018-06-22 14:20:37,610 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:20:37,610 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:20:37,610 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 14:20:37,946 INFO ]: Using library mode [2018-06-22 14:20:37,948 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:20:37 BoogieIcfgContainer [2018-06-22 14:20:37,948 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:20:37,950 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:20:37,950 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:20:37,958 INFO ]: TraceAbstraction initialized [2018-06-22 14:20:37,958 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:20:37" (1/3) ... [2018-06-22 14:20:37,959 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@571089c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:20:37, skipping insertion in model container [2018-06-22 14:20:37,959 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:20:37" (2/3) ... [2018-06-22 14:20:37,959 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@571089c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:20:37, skipping insertion in model container [2018-06-22 14:20:37,959 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:20:37" (3/3) ... [2018-06-22 14:20:37,967 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:20:37,976 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:20:37,988 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:20:38,038 INFO ]: Using default assertion order modulation [2018-06-22 14:20:38,038 INFO ]: Interprodecural is true [2018-06-22 14:20:38,038 INFO ]: Hoare is false [2018-06-22 14:20:38,039 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:20:38,039 INFO ]: Backedges is TWOTRACK [2018-06-22 14:20:38,039 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:20:38,039 INFO ]: Difference is false [2018-06-22 14:20:38,039 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:20:38,039 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:20:38,056 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:20:38,074 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:20:38,074 INFO ]: Found error trace [2018-06-22 14:20:38,075 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:20:38,075 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:20:38,081 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 14:20:38,083 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:20:38,083 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:20:38,115 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:20:38,115 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:20:38,115 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:20:38,149 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:20:38,245 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:20:38,248 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:20:38,248 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:20:38,250 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:20:38,264 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:20:38,265 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:20:38,266 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:20:38,367 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:20:38,367 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:20:38,368 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:20:38,369 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:20:38,369 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:20:38,378 INFO ]: With dead ends: 13 [2018-06-22 14:20:38,378 INFO ]: Without dead ends: 13 [2018-06-22 14:20:38,380 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:20:38,409 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:20:38,428 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:20:38,429 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:20:38,430 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:20:38,431 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:20:38,431 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:20:38,431 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:20:38,431 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:20:38,431 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:20:38,432 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:20:38,432 INFO ]: Found error trace [2018-06-22 14:20:38,432 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:20:38,432 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:20:38,433 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 14:20:38,433 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:20:38,433 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:20:38,433 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:20:38,433 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:20:38,433 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:20:38,597 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:20:39,117 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:20:39,118 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:20:39,118 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-22 14:20:39,136 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:20:39,234 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:20:39,246 INFO ]: Computing forward predicates... [2018-06-22 14:20:40,016 WARN ]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 14:20:40,068 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:20:40,089 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:20:40,090 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 14:20:40,090 INFO ]: Interpolant automaton has 10 states [2018-06-22 14:20:40,090 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 14:20:40,090 INFO ]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-06-22 14:20:40,091 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 10 states. [2018-06-22 14:20:40,379 WARN ]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-06-22 14:20:40,636 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:20:40,636 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 14:20:40,637 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 14:20:40,637 INFO ]: Start accepts. Automaton has 10 states. Word has length 13 [2018-06-22 14:20:40,637 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:20:40,637 INFO ]: With dead ends: 15 [2018-06-22 14:20:40,637 INFO ]: Without dead ends: 15 [2018-06-22 14:20:40,638 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-06-22 14:20:40,639 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 14:20:40,641 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 14:20:40,641 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 14:20:40,641 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 14:20:40,641 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 14:20:40,642 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:20:40,642 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 14:20:40,642 INFO ]: Interpolant automaton has 10 states. [2018-06-22 14:20:40,642 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 14:20:40,642 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 14:20:40,642 INFO ]: Found error trace [2018-06-22 14:20:40,642 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:20:40,642 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:20:40,642 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 14:20:40,642 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:20:40,642 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:20:40,643 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:20:40,643 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:20:40,643 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:20:40,724 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:20:40,931 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:20:40,931 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:20:41,034 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:20:41,043 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 14:20:41,144 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:20:41,144 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:20:41,153 INFO ]: Computing forward predicates... [2018-06-22 14:20:42,080 WARN ]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 14:20:42,928 WARN ]: Spent 463.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2018-06-22 14:20:43,094 INFO ]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:20:43,114 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:20:43,114 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-06-22 14:20:43,115 INFO ]: Interpolant automaton has 14 states [2018-06-22 14:20:43,115 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-22 14:20:43,115 INFO ]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2018-06-22 14:20:43,115 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 14 states. [2018-06-22 14:20:43,393 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:20:43,393 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 14:20:43,394 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:20:43,394 INFO ]: Start accepts. Automaton has 14 states. Word has length 17 [2018-06-22 14:20:43,394 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:20:43,395 INFO ]: With dead ends: 17 [2018-06-22 14:20:43,395 INFO ]: Without dead ends: 17 [2018-06-22 14:20:43,395 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2018-06-22 14:20:43,395 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 14:20:43,398 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 14:20:43,398 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 14:20:43,398 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 14:20:43,398 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 14:20:43,398 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:20:43,398 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 14:20:43,399 INFO ]: Interpolant automaton has 14 states. [2018-06-22 14:20:43,399 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 14:20:43,399 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 14:20:43,399 INFO ]: Found error trace [2018-06-22 14:20:43,399 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:20:43,400 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:20:43,400 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 14:20:43,400 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:20:43,400 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:20:43,400 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:20:43,400 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:20:43,400 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:20:43,492 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:20:43,924 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:20:43,924 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:20:43,924 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 14:20:43,933 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 14:20:44,044 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 14:20:44,044 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:20:44,053 INFO ]: Computing forward predicates... [2018-06-22 14:20:45,369 WARN ]: Spent 903.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2018-06-22 14:20:47,035 WARN ]: Spent 1.19 s on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2018-06-22 14:20:47,762 WARN ]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 14:20:48,520 INFO ]: Checked inductivity of 21 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:20:48,557 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:20:48,557 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2018-06-22 14:20:48,557 INFO ]: Interpolant automaton has 18 states [2018-06-22 14:20:48,557 INFO ]: Constructing interpolant automaton starting with 18 interpolants. [2018-06-22 14:20:48,558 INFO ]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2018-06-22 14:20:48,558 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 18 states. [2018-06-22 14:20:48,991 WARN ]: Spent 185.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2018-06-22 14:20:49,267 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:20:49,267 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 14:20:49,267 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 14:20:49,267 INFO ]: Start accepts. Automaton has 18 states. Word has length 21 [2018-06-22 14:20:49,268 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:20:49,268 INFO ]: With dead ends: 19 [2018-06-22 14:20:49,268 INFO ]: Without dead ends: 19 [2018-06-22 14:20:49,269 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2018-06-22 14:20:49,269 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 14:20:49,271 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 14:20:49,271 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 14:20:49,272 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 14:20:49,272 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 14:20:49,272 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:20:49,272 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 14:20:49,272 INFO ]: Interpolant automaton has 18 states. [2018-06-22 14:20:49,272 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 14:20:49,273 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 14:20:49,273 INFO ]: Found error trace [2018-06-22 14:20:49,273 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:20:49,273 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:20:49,273 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-22 14:20:49,273 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:20:49,273 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:20:49,274 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:20:49,274 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:20:49,274 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:20:49,425 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:20:49,886 WARN ]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 14:20:50,125 WARN ]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-22 14:20:50,507 WARN ]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-06-22 14:20:50,582 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 14:20:50,582 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:20:50,582 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 14:20:50,595 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 14:20:50,749 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 14:20:50,749 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:20:50,764 INFO ]: Computing forward predicates... [2018-06-22 14:20:51,920 WARN ]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2018-06-22 14:20:52,213 INFO ]: Checked inductivity of 36 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 14:20:52,234 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:20:52,234 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2018-06-22 14:20:52,234 INFO ]: Interpolant automaton has 22 states [2018-06-22 14:20:52,235 INFO ]: Constructing interpolant automaton starting with 22 interpolants. [2018-06-22 14:20:52,235 INFO ]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2018-06-22 14:20:52,235 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 22 states. [2018-06-22 14:20:52,516 WARN ]: Spent 225.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2018-06-22 14:20:53,035 WARN ]: Spent 183.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2018-06-22 14:20:53,071 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:20:53,071 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 14:20:53,071 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 14:20:53,071 INFO ]: Start accepts. Automaton has 22 states. Word has length 25 [2018-06-22 14:20:53,071 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:20:53,072 INFO ]: With dead ends: 21 [2018-06-22 14:20:53,072 INFO ]: Without dead ends: 21 [2018-06-22 14:20:53,072 INFO ]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2018-06-22 14:20:53,073 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 14:20:53,075 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 14:20:53,075 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 14:20:53,076 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 14:20:53,076 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 14:20:53,076 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:20:53,076 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 14:20:53,076 INFO ]: Interpolant automaton has 22 states. [2018-06-22 14:20:53,076 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 14:20:53,077 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 14:20:53,077 INFO ]: Found error trace [2018-06-22 14:20:53,077 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:20:53,077 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:20:53,077 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 5 times [2018-06-22 14:20:53,077 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:20:53,077 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:20:53,077 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:20:53,078 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:20:53,078 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:20:53,263 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:20:53,722 WARN ]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 14:20:53,916 WARN ]: Spent 126.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 12 [2018-06-22 14:20:54,066 WARN ]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 26 [2018-06-22 14:20:54,331 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 14:20:54,331 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:20:54,331 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 14:20:54,337 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 14:20:54,555 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 14:20:54,555 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:20:54,576 INFO ]: Computing forward predicates... [2018-06-22 14:20:56,048 WARN ]: Spent 923.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 10 [2018-06-22 14:21:00,963 WARN ]: Spent 4.23 s on a formula simplification. DAG size of input: 374 DAG size of output: 152 [2018-06-22 14:21:02,919 WARN ]: Spent 1.36 s on a formula simplification. DAG size of input: 325 DAG size of output: 69 [2018-06-22 14:21:08,246 WARN ]: Spent 4.52 s on a formula simplification. DAG size of input: 372 DAG size of output: 162 [2018-06-22 14:21:09,074 WARN ]: Spent 231.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 38 [2018-06-22 14:21:10,111 INFO ]: Checked inductivity of 55 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 14:21:10,132 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:21:10,132 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2018-06-22 14:21:10,132 INFO ]: Interpolant automaton has 26 states [2018-06-22 14:21:10,133 INFO ]: Constructing interpolant automaton starting with 26 interpolants. [2018-06-22 14:21:10,133 INFO ]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2018-06-22 14:21:10,133 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 26 states. [2018-06-22 14:21:13,280 WARN ]: Spent 3.08 s on a formula simplification. DAG size of input: 249 DAG size of output: 219 [2018-06-22 14:21:13,678 WARN ]: Spent 296.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 51 [2018-06-22 14:21:14,163 WARN ]: Spent 431.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 48 [2018-06-22 14:21:16,523 WARN ]: Spent 2.18 s on a formula simplification. DAG size of input: 256 DAG size of output: 177 [2018-06-22 14:21:18,470 WARN ]: Spent 1.85 s on a formula simplification. DAG size of input: 250 DAG size of output: 204 [2018-06-22 14:21:20,535 WARN ]: Spent 1.95 s on a formula simplification. DAG size of input: 249 DAG size of output: 210 [2018-06-22 14:21:23,471 WARN ]: Spent 2.79 s on a formula simplification. DAG size of input: 249 DAG size of output: 215 [2018-06-22 14:21:23,583 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:21:23,583 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 14:21:23,584 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 14:21:23,584 INFO ]: Start accepts. Automaton has 26 states. Word has length 29 [2018-06-22 14:21:23,584 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:21:23,585 INFO ]: With dead ends: 25 [2018-06-22 14:21:23,585 INFO ]: Without dead ends: 25 [2018-06-22 14:21:23,586 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=268, Invalid=788, Unknown=0, NotChecked=0, Total=1056 [2018-06-22 14:21:23,586 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 14:21:23,589 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 14:21:23,589 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 14:21:23,590 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 14:21:23,590 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 29 [2018-06-22 14:21:23,590 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:21:23,590 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 14:21:23,590 INFO ]: Interpolant automaton has 26 states. [2018-06-22 14:21:23,590 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 14:21:23,591 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 14:21:23,591 INFO ]: Found error trace [2018-06-22 14:21:23,591 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:21:23,591 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:21:23,591 INFO ]: Analyzing trace with hash -411423458, now seen corresponding path program 6 times [2018-06-22 14:21:23,591 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:21:23,591 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:21:23,592 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:21:23,592 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:21:23,592 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:21:23,870 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:21:24,590 WARN ]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2018-06-22 14:21:25,076 WARN ]: Spent 470.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 73 [2018-06-22 14:21:25,435 WARN ]: Spent 327.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 70 [2018-06-22 14:21:25,684 WARN ]: Spent 227.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 66 [2018-06-22 14:21:26,105 WARN ]: Spent 205.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 30 [2018-06-22 14:21:26,387 INFO ]: Checked inductivity of 105 backedges. 2 proven. 75 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 14:21:26,387 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:21:26,387 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) [2018-06-22 14:21:26,437 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:21:26,710 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-06-22 14:21:26,710 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:21:26,730 INFO ]: Computing forward predicates... [2018-06-22 14:21:27,843 WARN ]: Spent 683.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 10 [2018-06-22 14:21:32,524 WARN ]: Spent 4.11 s on a formula simplification. DAG size of input: 320 DAG size of output: 180 [2018-06-22 14:21:34,257 WARN ]: Spent 1.28 s on a formula simplification. DAG size of input: 325 DAG size of output: 57 [2018-06-22 14:21:34,615 WARN ]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2018-06-22 14:21:34,954 WARN ]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2018-06-22 14:21:36,215 WARN ]: Spent 149.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 23 [2018-06-22 14:21:36,246 INFO ]: Checked inductivity of 105 backedges. 6 proven. 70 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2018-06-22 14:21:36,268 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:21:36,268 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2018-06-22 14:21:36,269 INFO ]: Interpolant automaton has 33 states [2018-06-22 14:21:36,270 INFO ]: Constructing interpolant automaton starting with 33 interpolants. [2018-06-22 14:21:36,270 INFO ]: CoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2018-06-22 14:21:36,270 INFO ]: Start difference. First operand 25 states and 26 transitions. Second operand 33 states. Received shutdown request... [2018-06-22 14:21:37,183 WARN ]: Removed 27 from assertion stack [2018-06-22 14:21:37,183 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 14:21:37,184 WARN ]: Verification canceled [2018-06-22 14:21:37,187 WARN ]: Timeout [2018-06-22 14:21:37,187 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 02:21:37 BoogieIcfgContainer [2018-06-22 14:21:37,187 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 14:21:37,188 INFO ]: Toolchain (without parser) took 59725.39 ms. Allocated memory was 308.8 MB in the beginning and 1.2 GB in the end (delta: 845.7 MB). Free memory was 241.3 MB in the beginning and 858.6 MB in the end (delta: -617.3 MB). Peak memory consumption was 914.7 MB. Max. memory is 3.6 GB. [2018-06-22 14:21:37,188 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 308.8 MB. Free memory is still 271.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 14:21:37,188 INFO ]: ChcToBoogie took 56.76 ms. Allocated memory is still 308.8 MB. Free memory was 239.3 MB in the beginning and 237.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 14:21:37,188 INFO ]: Boogie Preprocessor took 57.77 ms. Allocated memory is still 308.8 MB. Free memory was 237.3 MB in the beginning and 235.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 14:21:37,189 INFO ]: RCFGBuilder took 363.99 ms. Allocated memory is still 308.8 MB. Free memory was 235.3 MB in the beginning and 207.2 MB in the end (delta: 28.1 MB). Peak memory consumption was 28.1 MB. Max. memory is 3.6 GB. [2018-06-22 14:21:37,189 INFO ]: TraceAbstraction took 59237.29 ms. Allocated memory was 308.8 MB in the beginning and 1.2 GB in the end (delta: 845.7 MB). Free memory was 207.2 MB in the beginning and 858.6 MB in the end (delta: -651.3 MB). Peak memory consumption was 880.7 MB. Max. memory is 3.6 GB. [2018-06-22 14:21:37,191 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 308.8 MB. Free memory is still 271.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 56.76 ms. Allocated memory is still 308.8 MB. Free memory was 239.3 MB in the beginning and 237.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 57.77 ms. Allocated memory is still 308.8 MB. Free memory was 237.3 MB in the beginning and 235.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 363.99 ms. Allocated memory is still 308.8 MB. Free memory was 235.3 MB in the beginning and 207.2 MB in the end (delta: 28.1 MB). Peak memory consumption was 28.1 MB. Max. memory is 3.6 GB. * TraceAbstraction took 59237.29 ms. Allocated memory was 308.8 MB in the beginning and 1.2 GB in the end (delta: 845.7 MB). Free memory was 207.2 MB in the beginning and 858.6 MB in the end (delta: -651.3 MB). Peak memory consumption was 880.7 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was constructing difference of abstraction (25states) and interpolant automaton (currently 3 states, 33 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 308. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 59.1s OverallTime, 7 OverallIterations, 8 TraceHistogramMax, 16.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 71 SDtfs, 107 SDslu, 316 SDs, 0 SdLazy, 240 SolverSat, 133 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 231 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 46.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 39.7s InterpolantComputationTime, 293 NumberOfCodeBlocks, 293 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 280 ConstructedInterpolants, 0 QuantifiedInterpolants, 207292 SizeOfPredicates, 3030 NumberOfNonLiveVariables, 2710 ConjunctsInSsa, 161 ConjunctsInUnsatCore, 13 InterpolantComputations, 1 PerfectInterpolantSequences, 146/460 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/s3_srvr_3.cil.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_14-21-37-200.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/s3_srvr_3.cil.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_14-21-37-200.csv Completed graceful shutdown