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/ctigar/seq-z3.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 15:35:15,033 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 15:35:15,034 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 15:35:15,046 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 15:35:15,049 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 15:35:15,050 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 15:35:15,051 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 15:35:15,053 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 15:35:15,054 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 15:35:15,055 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 15:35:15,057 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 15:35:15,058 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 15:35:15,059 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 15:35:15,060 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 15:35:15,060 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 15:35:15,063 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 15:35:15,065 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 15:35:15,066 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 15:35:15,068 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 15:35:15,069 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 15:35:15,070 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 15:35:15,072 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 15:35:15,073 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 15:35:15,073 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 15:35:15,074 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 15:35:15,075 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 15:35:15,075 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 15:35:15,076 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 15:35:15,077 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 15:35:15,078 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 15:35:15,083 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 15:35:15,084 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 15:35:15,084 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 15:35:15,085 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 15:35:15,085 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 15:35:15,086 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 15:35:15,104 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 15:35:15,104 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 15:35:15,108 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 15:35:15,108 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 15:35:15,109 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 15:35:15,109 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 15:35:15,110 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 15:35:15,110 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 15:35:15,110 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 15:35:15,110 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 15:35:15,110 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:35:15,111 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 15:35:15,111 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 15:35:15,111 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 15:35:15,111 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 15:35:15,111 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 15:35:15,111 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 15:35:15,112 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 15:35:15,112 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 15:35:15,114 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 15:35:15,114 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 15:35:15,166 INFO ]: Repository-Root is: /tmp [2018-06-22 15:35:15,181 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 15:35:15,184 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 15:35:15,185 INFO ]: Initializing SmtParser... [2018-06-22 15:35:15,186 INFO ]: SmtParser initialized [2018-06-22 15:35:15,186 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/seq-z3.c.smt2 [2018-06-22 15:35:15,188 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 15:35:15,283 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/seq-z3.c.smt2 unknown [2018-06-22 15:35:15,549 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/seq-z3.c.smt2 [2018-06-22 15:35:15,554 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 15:35:15,559 INFO ]: Walking toolchain with 4 elements. [2018-06-22 15:35:15,560 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 15:35:15,560 INFO ]: Initializing ChcToBoogie... [2018-06-22 15:35:15,560 INFO ]: ChcToBoogie initialized [2018-06-22 15:35:15,563 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:35:15" (1/1) ... [2018-06-22 15:35:15,618 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:35:15 Unit [2018-06-22 15:35:15,618 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 15:35:15,622 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 15:35:15,622 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 15:35:15,622 INFO ]: Boogie Preprocessor initialized [2018-06-22 15:35:15,645 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:35:15" (1/1) ... [2018-06-22 15:35:15,645 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:35:15" (1/1) ... [2018-06-22 15:35:15,664 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:35:15" (1/1) ... [2018-06-22 15:35:15,664 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:35:15" (1/1) ... [2018-06-22 15:35:15,668 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:35:15" (1/1) ... [2018-06-22 15:35:15,670 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:35:15" (1/1) ... [2018-06-22 15:35:15,680 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:35:15" (1/1) ... [2018-06-22 15:35:15,683 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 15:35:15,684 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 15:35:15,684 INFO ]: Initializing RCFGBuilder... [2018-06-22 15:35:15,684 INFO ]: RCFGBuilder initialized [2018-06-22 15:35:15,694 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:35:15" (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 15:35:15,716 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 15:35:15,716 INFO ]: Found specification of procedure False [2018-06-22 15:35:15,716 INFO ]: Found implementation of procedure False [2018-06-22 15:35:15,716 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 15:35:15,716 INFO ]: Found specification of procedure state [2018-06-22 15:35:15,716 INFO ]: Found implementation of procedure state [2018-06-22 15:35:15,716 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 15:35:15,716 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 15:35:15,716 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 15:35:15,939 INFO ]: Using library mode [2018-06-22 15:35:15,940 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:35:15 BoogieIcfgContainer [2018-06-22 15:35:15,940 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 15:35:15,941 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 15:35:15,942 INFO ]: Initializing TraceAbstraction... [2018-06-22 15:35:15,945 INFO ]: TraceAbstraction initialized [2018-06-22 15:35:15,945 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:35:15" (1/3) ... [2018-06-22 15:35:15,946 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@499667c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 03:35:15, skipping insertion in model container [2018-06-22 15:35:15,946 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:35:15" (2/3) ... [2018-06-22 15:35:15,946 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@499667c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 03:35:15, skipping insertion in model container [2018-06-22 15:35:15,946 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:35:15" (3/3) ... [2018-06-22 15:35:15,948 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 15:35:15,957 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 15:35:15,971 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 15:35:16,014 INFO ]: Using default assertion order modulation [2018-06-22 15:35:16,015 INFO ]: Interprodecural is true [2018-06-22 15:35:16,015 INFO ]: Hoare is false [2018-06-22 15:35:16,015 INFO ]: Compute interpolants for FPandBP [2018-06-22 15:35:16,015 INFO ]: Backedges is TWOTRACK [2018-06-22 15:35:16,015 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 15:35:16,015 INFO ]: Difference is false [2018-06-22 15:35:16,015 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 15:35:16,015 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 15:35:16,029 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 15:35:16,041 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 15:35:16,041 INFO ]: Found error trace [2018-06-22 15:35:16,042 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:35:16,042 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:35:16,048 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 15:35:16,050 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:35:16,051 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:35:16,087 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:35:16,087 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:35:16,087 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:35:16,114 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:35:16,298 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 15:35:16,300 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 15:35:16,301 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 15:35:16,302 INFO ]: Interpolant automaton has 4 states [2018-06-22 15:35:16,316 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 15:35:16,316 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:35:16,318 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 15:35:16,397 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:35:16,397 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 15:35:16,398 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 15:35:16,399 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 15:35:16,399 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:35:16,408 INFO ]: With dead ends: 13 [2018-06-22 15:35:16,408 INFO ]: Without dead ends: 13 [2018-06-22 15:35:16,410 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:35:16,424 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 15:35:16,443 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 15:35:16,444 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 15:35:16,445 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 15:35:16,446 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 15:35:16,446 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:35:16,446 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 15:35:16,446 INFO ]: Interpolant automaton has 4 states. [2018-06-22 15:35:16,446 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 15:35:16,447 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 15:35:16,447 INFO ]: Found error trace [2018-06-22 15:35:16,447 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:35:16,447 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:35:16,448 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 15:35:16,448 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:35:16,448 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:35:16,448 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:35:16,448 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:35:16,449 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:35:16,497 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:35:16,788 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:35:16,788 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:35:16,788 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 15:35:16,799 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:35:16,840 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:35:16,852 INFO ]: Computing forward predicates... [2018-06-22 15:35:17,389 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:35:17,429 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:35:17,429 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 15:35:17,429 INFO ]: Interpolant automaton has 9 states [2018-06-22 15:35:17,429 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 15:35:17,430 INFO ]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-06-22 15:35:17,430 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 15:35:17,909 WARN ]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-22 15:35:17,981 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:35:17,981 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 15:35:17,982 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 15:35:17,982 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 15:35:17,982 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:35:17,983 INFO ]: With dead ends: 15 [2018-06-22 15:35:17,983 INFO ]: Without dead ends: 15 [2018-06-22 15:35:17,984 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2018-06-22 15:35:17,984 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 15:35:17,987 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 15:35:17,987 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 15:35:17,988 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 15:35:17,988 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 15:35:17,988 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:35:17,988 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 15:35:17,988 INFO ]: Interpolant automaton has 9 states. [2018-06-22 15:35:17,988 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 15:35:17,989 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 15:35:17,989 INFO ]: Found error trace [2018-06-22 15:35:17,989 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:35:17,989 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:35:17,989 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 15:35:17,989 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:35:17,989 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:35:17,990 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:35:17,990 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:35:17,990 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:35:18,075 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:35:18,358 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:35:18,359 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:35:18,359 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 15:35:18,370 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:35:18,440 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:35:18,440 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:35:18,444 INFO ]: Computing forward predicates... [2018-06-22 15:35:18,854 WARN ]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-22 15:35:19,393 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:35:19,420 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:35:19,420 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-06-22 15:35:19,421 INFO ]: Interpolant automaton has 11 states [2018-06-22 15:35:19,421 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-22 15:35:19,421 INFO ]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-06-22 15:35:19,421 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-06-22 15:35:19,790 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:35:19,790 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 15:35:19,791 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 15:35:19,791 INFO ]: Start accepts. Automaton has 11 states. Word has length 17 [2018-06-22 15:35:19,791 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:35:19,792 INFO ]: With dead ends: 17 [2018-06-22 15:35:19,792 INFO ]: Without dead ends: 17 [2018-06-22 15:35:19,792 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2018-06-22 15:35:19,792 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 15:35:19,795 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 15:35:19,795 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 15:35:19,796 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 15:35:19,796 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 15:35:19,796 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:35:19,796 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 15:35:19,796 INFO ]: Interpolant automaton has 11 states. [2018-06-22 15:35:19,796 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 15:35:19,797 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 15:35:19,797 INFO ]: Found error trace [2018-06-22 15:35:19,797 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:35:19,797 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:35:19,797 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 15:35:19,797 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:35:19,797 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:35:19,798 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:35:19,798 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:35:19,798 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:35:19,838 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:35:20,260 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:35:20,260 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:35:20,261 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 15:35:20,290 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 15:35:20,352 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 15:35:20,352 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:35:20,357 INFO ]: Computing forward predicates... [2018-06-22 15:35:20,532 WARN ]: Spent 129.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2018-06-22 15:35:21,327 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:35:21,348 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:35:21,348 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2018-06-22 15:35:21,349 INFO ]: Interpolant automaton has 13 states [2018-06-22 15:35:21,349 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 15:35:21,349 INFO ]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2018-06-22 15:35:21,349 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 13 states. [2018-06-22 15:35:21,545 WARN ]: Spent 141.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2018-06-22 15:35:21,791 WARN ]: Spent 152.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2018-06-22 15:35:21,970 WARN ]: Spent 148.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2018-06-22 15:35:22,015 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:35:22,016 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 15:35:22,017 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 15:35:22,017 INFO ]: Start accepts. Automaton has 13 states. Word has length 21 [2018-06-22 15:35:22,017 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:35:22,018 INFO ]: With dead ends: 19 [2018-06-22 15:35:22,018 INFO ]: Without dead ends: 19 [2018-06-22 15:35:22,018 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-06-22 15:35:22,018 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 15:35:22,021 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 15:35:22,021 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 15:35:22,022 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 15:35:22,022 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 15:35:22,022 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:35:22,022 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 15:35:22,022 INFO ]: Interpolant automaton has 13 states. [2018-06-22 15:35:22,022 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 15:35:22,023 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 15:35:22,023 INFO ]: Found error trace [2018-06-22 15:35:22,023 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:35:22,023 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:35:22,024 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-22 15:35:22,024 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:35:22,024 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:35:22,024 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:35:22,025 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:35:22,025 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:35:22,063 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:35:22,450 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:35:22,450 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:35:22,450 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 15:35:22,461 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 15:35:22,523 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 15:35:22,523 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:35:22,528 INFO ]: Computing forward predicates... [2018-06-22 15:35:23,507 WARN ]: Spent 292.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2018-06-22 15:35:23,764 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:35:23,785 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:35:23,785 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2018-06-22 15:35:23,785 INFO ]: Interpolant automaton has 15 states [2018-06-22 15:35:23,786 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-22 15:35:23,786 INFO ]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2018-06-22 15:35:23,786 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 15 states. [2018-06-22 15:35:23,982 WARN ]: Spent 161.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2018-06-22 15:35:24,185 WARN ]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2018-06-22 15:35:24,314 WARN ]: Spent 111.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2018-06-22 15:35:24,481 WARN ]: Spent 148.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2018-06-22 15:35:24,510 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:35:24,510 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 15:35:24,513 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 15:35:24,513 INFO ]: Start accepts. Automaton has 15 states. Word has length 25 [2018-06-22 15:35:24,513 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:35:24,514 INFO ]: With dead ends: 21 [2018-06-22 15:35:24,514 INFO ]: Without dead ends: 21 [2018-06-22 15:35:24,514 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2018-06-22 15:35:24,514 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 15:35:24,520 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 15:35:24,520 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 15:35:24,520 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 15:35:24,520 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 15:35:24,521 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:35:24,521 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 15:35:24,521 INFO ]: Interpolant automaton has 15 states. [2018-06-22 15:35:24,521 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 15:35:24,521 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 15:35:24,521 INFO ]: Found error trace [2018-06-22 15:35:24,522 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:35:24,522 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:35:24,522 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 5 times [2018-06-22 15:35:24,522 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:35:24,522 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:35:24,522 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:35:24,523 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:35:24,523 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:35:24,563 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:35:24,949 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:35:24,949 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:35:24,949 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 15:35:24,955 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 15:35:25,014 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 15:35:25,014 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:35:25,019 INFO ]: Computing forward predicates... [2018-06-22 15:35:25,487 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:35:25,507 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:35:25,507 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2018-06-22 15:35:25,508 INFO ]: Interpolant automaton has 17 states [2018-06-22 15:35:25,508 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 15:35:25,508 INFO ]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2018-06-22 15:35:25,508 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 17 states. [2018-06-22 15:35:26,123 WARN ]: Spent 573.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2018-06-22 15:35:26,399 WARN ]: Spent 142.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 28 [2018-06-22 15:35:26,684 WARN ]: Spent 207.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2018-06-22 15:35:26,990 WARN ]: Spent 281.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2018-06-22 15:35:27,435 WARN ]: Spent 412.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2018-06-22 15:35:27,463 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:35:27,463 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 15:35:27,464 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 15:35:27,465 INFO ]: Start accepts. Automaton has 17 states. Word has length 29 [2018-06-22 15:35:27,465 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:35:27,465 INFO ]: With dead ends: 23 [2018-06-22 15:35:27,465 INFO ]: Without dead ends: 23 [2018-06-22 15:35:27,466 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2018-06-22 15:35:27,466 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 15:35:27,469 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 15:35:27,469 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 15:35:27,470 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 15:35:27,470 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 15:35:27,470 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:35:27,470 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 15:35:27,470 INFO ]: Interpolant automaton has 17 states. [2018-06-22 15:35:27,470 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 15:35:27,471 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 15:35:27,471 INFO ]: Found error trace [2018-06-22 15:35:27,471 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:35:27,471 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:35:27,471 INFO ]: Analyzing trace with hash -1661294575, now seen corresponding path program 6 times [2018-06-22 15:35:27,471 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:35:27,471 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:35:27,472 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:35:27,472 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:35:27,472 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:35:27,556 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:35:28,614 WARN ]: Spent 764.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2018-06-22 15:35:28,946 WARN ]: Spent 326.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2018-06-22 15:35:29,301 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:35:29,301 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:35:29,301 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 15:35:29,315 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 15:35:29,435 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-22 15:35:29,435 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:35:29,442 INFO ]: Computing forward predicates... [2018-06-22 15:35:32,802 WARN ]: Spent 2.68 s on a formula simplification. DAG size of input: 214 DAG size of output: 44 [2018-06-22 15:35:33,209 WARN ]: Spent 162.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2018-06-22 15:35:33,873 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:35:33,902 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:35:33,902 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2018-06-22 15:35:33,903 INFO ]: Interpolant automaton has 22 states [2018-06-22 15:35:33,903 INFO ]: Constructing interpolant automaton starting with 22 interpolants. [2018-06-22 15:35:33,903 INFO ]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2018-06-22 15:35:33,903 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 22 states. [2018-06-22 15:35:34,539 WARN ]: Spent 478.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2018-06-22 15:35:34,743 WARN ]: Spent 170.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 27 [2018-06-22 15:35:35,003 WARN ]: Spent 234.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 35 [2018-06-22 15:35:35,388 WARN ]: Spent 277.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 40 [2018-06-22 15:35:35,761 WARN ]: Spent 345.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 37 [2018-06-22 15:35:36,080 WARN ]: Spent 287.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 42 [2018-06-22 15:35:36,551 WARN ]: Spent 440.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 53 [2018-06-22 15:35:36,582 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:35:36,582 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 15:35:36,583 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 15:35:36,583 INFO ]: Start accepts. Automaton has 22 states. Word has length 33 [2018-06-22 15:35:36,583 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:35:36,584 INFO ]: With dead ends: 25 [2018-06-22 15:35:36,584 INFO ]: Without dead ends: 25 [2018-06-22 15:35:36,585 INFO ]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2018-06-22 15:35:36,585 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 15:35:36,589 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 15:35:36,589 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 15:35:36,590 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 15:35:36,590 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 33 [2018-06-22 15:35:36,590 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:35:36,590 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 15:35:36,590 INFO ]: Interpolant automaton has 22 states. [2018-06-22 15:35:36,590 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 15:35:36,591 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 15:35:36,591 INFO ]: Found error trace [2018-06-22 15:35:36,591 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:35:36,591 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:35:36,592 INFO ]: Analyzing trace with hash -1494134477, now seen corresponding path program 7 times [2018-06-22 15:35:36,592 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:35:36,592 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:35:36,592 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:35:36,592 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:35:36,592 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:35:36,661 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:35:37,505 WARN ]: Spent 559.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2018-06-22 15:35:38,004 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:35:38,004 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:35:38,004 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:35:38,012 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:35:38,066 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:35:38,072 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-22 15:36:23,206 WARN ]: Removed 2 from assertion stack [2018-06-22 15:36:23,206 INFO ]: Timeout while computing interpolants [2018-06-22 15:36:23,406 WARN ]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:36:23,407 WARN ]: Verification canceled [2018-06-22 15:36:23,411 WARN ]: Timeout [2018-06-22 15:36:23,411 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 03:36:23 BoogieIcfgContainer [2018-06-22 15:36:23,411 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 15:36:23,412 INFO ]: Toolchain (without parser) took 67857.80 ms. Allocated memory was 309.3 MB in the beginning and 1.0 GB in the end (delta: 734.5 MB). Free memory was 261.7 MB in the beginning and 793.7 MB in the end (delta: -532.0 MB). Peak memory consumption was 831.6 MB. Max. memory is 3.6 GB. [2018-06-22 15:36:23,412 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 309.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 15:36:23,413 INFO ]: ChcToBoogie took 61.45 ms. Allocated memory is still 309.3 MB. Free memory was 259.7 MB in the beginning and 257.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:36:23,413 INFO ]: Boogie Preprocessor took 61.32 ms. Allocated memory is still 309.3 MB. Free memory is still 257.7 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 15:36:23,413 INFO ]: RCFGBuilder took 256.47 ms. Allocated memory is still 309.3 MB. Free memory was 257.7 MB in the beginning and 247.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:36:23,414 INFO ]: TraceAbstraction took 67469.63 ms. Allocated memory was 309.3 MB in the beginning and 1.0 GB in the end (delta: 734.5 MB). Free memory was 247.8 MB in the beginning and 793.7 MB in the end (delta: -545.9 MB). Peak memory consumption was 817.7 MB. Max. memory is 3.6 GB. [2018-06-22 15:36:23,417 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 309.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 61.45 ms. Allocated memory is still 309.3 MB. Free memory was 259.7 MB in the beginning and 257.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 61.32 ms. Allocated memory is still 309.3 MB. Free memory is still 257.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * RCFGBuilder took 256.47 ms. Allocated memory is still 309.3 MB. Free memory was 257.7 MB in the beginning and 247.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 67469.63 ms. Allocated memory was 309.3 MB in the beginning and 1.0 GB in the end (delta: 734.5 MB). Free memory was 247.8 MB in the beginning and 793.7 MB in the end (delta: -545.9 MB). Peak memory consumption was 817.7 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 analyzing trace of length 38 with TraceHistMax 8, while TraceCheckSpWp was constructing forward predicates, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 5403. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 67.4s OverallTime, 8 OverallIterations, 8 TraceHistogramMax, 7.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 87 SDtfs, 172 SDslu, 425 SDs, 0 SdLazy, 351 SolverSat, 224 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 235 GetRequests, 116 SyntacticMatches, 9 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 15.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 12.3s InterpolantComputationTime, 285 NumberOfCodeBlocks, 285 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 272 ConstructedInterpolants, 0 QuantifiedInterpolants, 98284 SizeOfPredicates, 291 NumberOfNonLiveVariables, 1197 ConjunctsInSsa, 207 ConjunctsInUnsatCore, 13 InterpolantComputations, 1 PerfectInterpolantSequences, 112/406 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/seq-z3.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_15-36-23-428.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/seq-z3.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_15-36-23-428.csv Completed graceful shutdown