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/sally-chc-benchmarks/misc/inc_cas_prop1.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 12:37:27,749 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 12:37:27,751 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 12:37:27,765 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 12:37:27,766 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 12:37:27,767 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 12:37:27,768 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 12:37:27,770 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 12:37:27,771 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 12:37:27,772 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 12:37:27,773 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 12:37:27,773 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 12:37:27,774 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 12:37:27,775 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 12:37:27,776 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 12:37:27,777 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 12:37:27,779 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 12:37:27,783 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 12:37:27,795 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 12:37:27,797 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 12:37:27,798 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 12:37:27,800 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 12:37:27,801 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 12:37:27,801 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 12:37:27,802 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 12:37:27,802 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 12:37:27,803 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 12:37:27,804 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 12:37:27,811 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 12:37:27,811 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 12:37:27,812 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 12:37:27,812 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 12:37:27,813 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 12:37:27,813 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 12:37:27,814 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 12:37:27,814 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 12:37:27,838 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 12:37:27,838 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 12:37:27,839 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 12:37:27,839 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 12:37:27,840 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 12:37:27,840 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 12:37:27,840 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 12:37:27,840 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 12:37:27,841 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 12:37:27,843 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 12:37:27,844 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 12:37:27,844 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 12:37:27,844 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 12:37:27,844 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 12:37:27,844 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 12:37:27,845 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 12:37:27,845 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 12:37:27,845 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 12:37:27,845 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 12:37:27,847 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 12:37:27,848 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 12:37:27,901 INFO ]: Repository-Root is: /tmp [2018-06-22 12:37:27,916 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 12:37:27,923 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 12:37:27,925 INFO ]: Initializing SmtParser... [2018-06-22 12:37:27,925 INFO ]: SmtParser initialized [2018-06-22 12:37:27,925 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/sally-chc-benchmarks/misc/inc_cas_prop1.smt2 [2018-06-22 12:37:27,927 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 12:37:28,015 INFO ]: Executing SMT file /storage/chc-comp/sally-chc-benchmarks/misc/inc_cas_prop1.smt2 unknown [2018-06-22 12:37:28,190 INFO ]: Succesfully executed SMT file /storage/chc-comp/sally-chc-benchmarks/misc/inc_cas_prop1.smt2 [2018-06-22 12:37:28,204 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 12:37:28,216 INFO ]: Walking toolchain with 4 elements. [2018-06-22 12:37:28,217 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 12:37:28,217 INFO ]: Initializing ChcToBoogie... [2018-06-22 12:37:28,217 INFO ]: ChcToBoogie initialized [2018-06-22 12:37:28,220 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 12:37:28" (1/1) ... [2018-06-22 12:37:28,266 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:37:28 Unit [2018-06-22 12:37:28,267 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 12:37:28,267 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 12:37:28,267 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 12:37:28,267 INFO ]: Boogie Preprocessor initialized [2018-06-22 12:37:28,291 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:37:28" (1/1) ... [2018-06-22 12:37:28,291 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:37:28" (1/1) ... [2018-06-22 12:37:28,299 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:37:28" (1/1) ... [2018-06-22 12:37:28,299 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:37:28" (1/1) ... [2018-06-22 12:37:28,302 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:37:28" (1/1) ... [2018-06-22 12:37:28,304 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:37:28" (1/1) ... [2018-06-22 12:37:28,305 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:37:28" (1/1) ... [2018-06-22 12:37:28,306 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 12:37:28,313 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 12:37:28,313 INFO ]: Initializing RCFGBuilder... [2018-06-22 12:37:28,313 INFO ]: RCFGBuilder initialized [2018-06-22 12:37:28,314 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:37:28" (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 12:37:28,330 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 12:37:28,330 INFO ]: Found specification of procedure False [2018-06-22 12:37:28,331 INFO ]: Found implementation of procedure False [2018-06-22 12:37:28,331 INFO ]: Specification and implementation of procedure invariant given in one single declaration [2018-06-22 12:37:28,331 INFO ]: Found specification of procedure invariant [2018-06-22 12:37:28,331 INFO ]: Found implementation of procedure invariant [2018-06-22 12:37:28,331 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 12:37:28,331 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 12:37:28,331 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 12:37:28,626 INFO ]: Using library mode [2018-06-22 12:37:28,626 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 12:37:28 BoogieIcfgContainer [2018-06-22 12:37:28,627 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 12:37:28,628 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 12:37:28,628 INFO ]: Initializing TraceAbstraction... [2018-06-22 12:37:28,631 INFO ]: TraceAbstraction initialized [2018-06-22 12:37:28,631 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 12:37:28" (1/3) ... [2018-06-22 12:37:28,632 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@237d7d69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 12:37:28, skipping insertion in model container [2018-06-22 12:37:28,632 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:37:28" (2/3) ... [2018-06-22 12:37:28,632 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@237d7d69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 12:37:28, skipping insertion in model container [2018-06-22 12:37:28,633 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 12:37:28" (3/3) ... [2018-06-22 12:37:28,644 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 12:37:28,662 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 12:37:28,675 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 12:37:28,754 INFO ]: Using default assertion order modulation [2018-06-22 12:37:28,755 INFO ]: Interprodecural is true [2018-06-22 12:37:28,755 INFO ]: Hoare is false [2018-06-22 12:37:28,755 INFO ]: Compute interpolants for FPandBP [2018-06-22 12:37:28,755 INFO ]: Backedges is TWOTRACK [2018-06-22 12:37:28,755 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 12:37:28,755 INFO ]: Difference is false [2018-06-22 12:37:28,755 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 12:37:28,755 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 12:37:28,773 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 12:37:28,786 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 12:37:28,786 INFO ]: Found error trace [2018-06-22 12:37:28,787 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:37:28,787 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:37:28,793 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 12:37:28,795 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:37:28,795 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:37:28,828 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:37:28,828 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:37:28,828 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:37:28,862 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:37:28,968 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 12:37:28,970 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 12:37:28,970 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 12:37:28,971 INFO ]: Interpolant automaton has 4 states [2018-06-22 12:37:28,981 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 12:37:28,982 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 12:37:28,983 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 12:37:29,058 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:37:29,058 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 12:37:29,059 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 12:37:29,060 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 12:37:29,060 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:37:29,073 INFO ]: With dead ends: 13 [2018-06-22 12:37:29,073 INFO ]: Without dead ends: 13 [2018-06-22 12:37:29,075 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 12:37:29,094 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 12:37:29,116 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 12:37:29,116 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 12:37:29,117 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 12:37:29,118 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 12:37:29,118 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:37:29,118 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 12:37:29,118 INFO ]: Interpolant automaton has 4 states. [2018-06-22 12:37:29,119 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 12:37:29,120 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 12:37:29,120 INFO ]: Found error trace [2018-06-22 12:37:29,120 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:37:29,120 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:37:29,120 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 12:37:29,120 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:37:29,120 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:37:29,121 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:37:29,121 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:37:29,121 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:37:29,159 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:37:29,612 WARN ]: Spent 301.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 20 [2018-06-22 12:37:29,652 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 12:37:29,652 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:37:29,652 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 12:37:29,660 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:37:29,700 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:37:29,710 INFO ]: Computing forward predicates... [2018-06-22 12:37:30,442 WARN ]: Spent 547.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2018-06-22 12:37:30,512 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 12:37:30,532 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:37:30,532 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-22 12:37:30,533 INFO ]: Interpolant automaton has 8 states [2018-06-22 12:37:30,533 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 12:37:30,533 INFO ]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-06-22 12:37:30,534 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-22 12:37:31,244 WARN ]: Spent 615.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2018-06-22 12:37:31,293 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:37:31,293 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 12:37:31,294 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 12:37:31,294 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-22 12:37:31,294 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:37:31,295 INFO ]: With dead ends: 15 [2018-06-22 12:37:31,295 INFO ]: Without dead ends: 15 [2018-06-22 12:37:31,296 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-06-22 12:37:31,296 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 12:37:31,301 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 12:37:31,301 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 12:37:31,302 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 12:37:31,302 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 12:37:31,302 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:37:31,302 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 12:37:31,302 INFO ]: Interpolant automaton has 8 states. [2018-06-22 12:37:31,302 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 12:37:31,302 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 12:37:31,302 INFO ]: Found error trace [2018-06-22 12:37:31,303 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:37:31,303 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:37:31,303 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 12:37:31,303 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:37:31,303 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:37:31,305 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:37:31,305 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:37:31,305 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:37:31,377 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:37:31,902 WARN ]: Spent 335.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2018-06-22 12:37:32,042 WARN ]: Spent 126.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2018-06-22 12:37:32,150 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 12:37:32,151 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:37:32,151 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 12:37:32,162 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 12:37:32,191 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 12:37:32,191 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:37:32,195 INFO ]: Computing forward predicates... [2018-06-22 12:37:32,511 WARN ]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2018-06-22 12:37:32,917 WARN ]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2018-06-22 12:37:33,305 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 12:37:33,327 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:37:33,327 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 12:37:33,327 INFO ]: Interpolant automaton has 13 states [2018-06-22 12:37:33,328 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 12:37:33,329 INFO ]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-06-22 12:37:33,329 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 12:37:34,904 WARN ]: Spent 1.55 s on a formula simplification. DAG size of input: 112 DAG size of output: 98 [2018-06-22 12:37:35,148 WARN ]: Spent 201.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 50 [2018-06-22 12:37:36,264 WARN ]: Spent 1.08 s on a formula simplification. DAG size of input: 118 DAG size of output: 96 [2018-06-22 12:37:36,313 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:37:36,313 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 12:37:36,317 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 12:37:36,317 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 12:37:36,317 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:37:36,317 INFO ]: With dead ends: 17 [2018-06-22 12:37:36,317 INFO ]: Without dead ends: 17 [2018-06-22 12:37:36,318 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2018-06-22 12:37:36,318 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 12:37:36,320 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 12:37:36,320 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 12:37:36,321 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 12:37:36,321 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 12:37:36,321 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:37:36,321 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 12:37:36,321 INFO ]: Interpolant automaton has 13 states. [2018-06-22 12:37:36,321 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 12:37:36,322 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 12:37:36,322 INFO ]: Found error trace [2018-06-22 12:37:36,322 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:37:36,322 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:37:36,322 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 12:37:36,322 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:37:36,322 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:37:36,323 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:37:36,323 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 12:37:36,323 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:37:36,372 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:37:36,697 WARN ]: Spent 109.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 7 [2018-06-22 12:37:37,172 WARN ]: Spent 417.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2018-06-22 12:37:37,434 WARN ]: Spent 249.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2018-06-22 12:37:37,608 WARN ]: Spent 159.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2018-06-22 12:37:37,813 WARN ]: Spent 167.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2018-06-22 12:37:37,971 WARN ]: Spent 136.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2018-06-22 12:37:38,000 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 12:37:38,000 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:37:38,000 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 12:37:38,009 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 12:37:38,077 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 12:37:38,077 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:37:38,081 INFO ]: Computing forward predicates... [2018-06-22 12:37:38,329 WARN ]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2018-06-22 12:37:38,975 INFO ]: Checked inductivity of 21 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 12:37:38,999 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:37:38,999 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2018-06-22 12:37:39,000 INFO ]: Interpolant automaton has 16 states [2018-06-22 12:37:39,000 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 12:37:39,000 INFO ]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2018-06-22 12:37:39,000 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 16 states. [2018-06-22 12:37:39,613 WARN ]: Spent 570.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 100 [2018-06-22 12:37:39,925 WARN ]: Spent 253.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 63 [2018-06-22 12:37:40,489 WARN ]: Spent 533.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 98 [2018-06-22 12:37:41,148 WARN ]: Spent 588.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 107 [2018-06-22 12:37:41,243 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:37:41,243 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 12:37:41,244 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 12:37:41,244 INFO ]: Start accepts. Automaton has 16 states. Word has length 21 [2018-06-22 12:37:41,244 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:37:41,244 INFO ]: With dead ends: 19 [2018-06-22 12:37:41,245 INFO ]: Without dead ends: 19 [2018-06-22 12:37:41,245 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2018-06-22 12:37:41,245 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 12:37:41,248 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 12:37:41,248 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 12:37:41,249 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 12:37:41,249 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 12:37:41,249 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:37:41,249 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 12:37:41,249 INFO ]: Interpolant automaton has 16 states. [2018-06-22 12:37:41,249 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 12:37:41,249 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 12:37:41,249 INFO ]: Found error trace [2018-06-22 12:37:41,249 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:37:41,250 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:37:41,250 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-22 12:37:41,250 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:37:41,250 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:37:41,250 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:37:41,250 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 12:37:41,250 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:37:41,283 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:37:41,707 WARN ]: Spent 147.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2018-06-22 12:37:41,898 WARN ]: Spent 181.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 85 [2018-06-22 12:37:42,070 WARN ]: Spent 131.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2018-06-22 12:37:42,515 WARN ]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2018-06-22 12:37:42,612 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 12:37:42,612 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:37:42,612 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 12:37:42,619 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 12:37:42,661 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 12:37:42,661 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:37:42,665 INFO ]: Computing forward predicates... [2018-06-22 12:37:44,082 WARN ]: Spent 229.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 6 [2018-06-22 12:37:44,102 INFO ]: Checked inductivity of 36 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-06-22 12:37:44,132 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:37:44,132 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2018-06-22 12:37:44,132 INFO ]: Interpolant automaton has 20 states [2018-06-22 12:37:44,133 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-22 12:37:44,133 INFO ]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2018-06-22 12:37:44,133 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 20 states. [2018-06-22 12:37:45,493 WARN ]: Spent 958.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 108 [2018-06-22 12:37:45,904 WARN ]: Spent 203.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 61 [2018-06-22 12:37:46,246 WARN ]: Spent 294.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 78 [2018-06-22 12:37:46,906 WARN ]: Spent 611.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 101 [2018-06-22 12:37:47,600 WARN ]: Spent 580.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 129 [2018-06-22 12:37:48,114 WARN ]: Spent 458.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 105 [2018-06-22 12:37:48,160 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:37:48,160 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 12:37:48,161 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 12:37:48,161 INFO ]: Start accepts. Automaton has 20 states. Word has length 25 [2018-06-22 12:37:48,161 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:37:48,161 INFO ]: With dead ends: 23 [2018-06-22 12:37:48,161 INFO ]: Without dead ends: 23 [2018-06-22 12:37:48,162 INFO ]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2018-06-22 12:37:48,162 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 12:37:48,165 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 12:37:48,165 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 12:37:48,166 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 12:37:48,166 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 25 [2018-06-22 12:37:48,166 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:37:48,166 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 12:37:48,166 INFO ]: Interpolant automaton has 20 states. [2018-06-22 12:37:48,166 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 12:37:48,167 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 12:37:48,167 INFO ]: Found error trace [2018-06-22 12:37:48,167 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:37:48,167 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:37:48,167 INFO ]: Analyzing trace with hash 800064122, now seen corresponding path program 5 times [2018-06-22 12:37:48,168 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:37:48,168 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:37:48,168 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:37:48,168 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 12:37:48,168 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:37:48,236 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:37:49,254 WARN ]: Spent 509.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 35 [2018-06-22 12:37:49,754 WARN ]: Spent 475.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 102 [2018-06-22 12:37:50,263 WARN ]: Spent 459.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 98 [2018-06-22 12:37:50,796 WARN ]: Spent 445.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 77 [2018-06-22 12:37:51,542 WARN ]: Spent 594.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 78 [2018-06-22 12:37:51,831 WARN ]: Spent 197.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 54 [2018-06-22 12:37:52,215 WARN ]: Spent 217.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 38 [2018-06-22 12:37:52,557 WARN ]: Spent 260.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 45 [2018-06-22 12:37:52,853 WARN ]: Spent 254.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 38 [2018-06-22 12:37:53,165 WARN ]: Spent 179.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 39 [2018-06-22 12:37:53,195 INFO ]: Checked inductivity of 78 backedges. 1 proven. 56 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 12:37:53,195 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:37:53,196 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 12:37:53,202 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 12:37:53,274 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-06-22 12:37:53,274 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:37:53,281 INFO ]: Computing forward predicates... [2018-06-22 12:37:54,393 WARN ]: Spent 150.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2018-06-22 12:37:54,770 WARN ]: Spent 240.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2018-06-22 12:37:55,064 WARN ]: Spent 213.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2018-06-22 12:37:55,133 INFO ]: Checked inductivity of 78 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-06-22 12:37:55,154 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:37:55,154 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2018-06-22 12:37:55,154 INFO ]: Interpolant automaton has 26 states [2018-06-22 12:37:55,154 INFO ]: Constructing interpolant automaton starting with 26 interpolants. [2018-06-22 12:37:55,154 INFO ]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2018-06-22 12:37:55,154 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 26 states. [2018-06-22 12:37:55,334 WARN ]: Spent 120.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 55 [2018-06-22 12:37:55,588 WARN ]: Spent 231.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 78 [2018-06-22 12:37:56,073 WARN ]: Spent 339.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 84 [2018-06-22 12:37:56,564 WARN ]: Spent 456.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 105 [2018-06-22 12:37:56,576 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:37:56,603 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 12:37:56,604 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 12:37:56,604 INFO ]: Start accepts. Automaton has 26 states. Word has length 33 [2018-06-22 12:37:56,604 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:37:56,604 INFO ]: With dead ends: 19 [2018-06-22 12:37:56,604 INFO ]: Without dead ends: 0 [2018-06-22 12:37:56,605 INFO ]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2018-06-22 12:37:56,605 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 12:37:56,605 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 12:37:56,605 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 12:37:56,605 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 12:37:56,605 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2018-06-22 12:37:56,605 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:37:56,605 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 12:37:56,605 INFO ]: Interpolant automaton has 26 states. [2018-06-22 12:37:56,605 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 12:37:56,605 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 12:37:56,609 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 12:37:56 BoogieIcfgContainer [2018-06-22 12:37:56,609 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 12:37:56,610 INFO ]: Toolchain (without parser) took 28405.20 ms. Allocated memory was 309.3 MB in the beginning and 576.2 MB in the end (delta: 266.9 MB). Free memory was 263.7 MB in the beginning and 361.3 MB in the end (delta: -97.6 MB). Peak memory consumption was 169.2 MB. Max. memory is 3.6 GB. [2018-06-22 12:37:56,610 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 12:37:56,610 INFO ]: ChcToBoogie took 50.20 ms. Allocated memory is still 309.3 MB. Free memory was 263.7 MB in the beginning and 261.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 12:37:56,611 INFO ]: Boogie Preprocessor took 39.26 ms. Allocated memory is still 309.3 MB. Free memory is still 261.7 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 12:37:56,611 INFO ]: RCFGBuilder took 313.86 ms. Allocated memory is still 309.3 MB. Free memory was 261.7 MB in the beginning and 253.8 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. [2018-06-22 12:37:56,612 INFO ]: TraceAbstraction took 27981.28 ms. Allocated memory was 309.3 MB in the beginning and 576.2 MB in the end (delta: 266.9 MB). Free memory was 253.8 MB in the beginning and 361.3 MB in the end (delta: -107.6 MB). Peak memory consumption was 159.3 MB. Max. memory is 3.6 GB. [2018-06-22 12:37:56,614 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 50.20 ms. Allocated memory is still 309.3 MB. Free memory was 263.7 MB in the beginning and 261.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 39.26 ms. Allocated memory is still 309.3 MB. Free memory is still 261.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * RCFGBuilder took 313.86 ms. Allocated memory is still 309.3 MB. Free memory was 261.7 MB in the beginning and 253.8 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 27981.28 ms. Allocated memory was 309.3 MB in the beginning and 576.2 MB in the end (delta: 266.9 MB). Free memory was 253.8 MB in the beginning and 361.3 MB in the end (delta: -107.6 MB). Peak memory consumption was 159.3 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. SAFE Result, 27.8s OverallTime, 6 OverallIterations, 7 TraceHistogramMax, 11.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 68 SDtfs, 96 SDslu, 307 SDs, 0 SdLazy, 277 SolverSat, 120 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 179 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 23.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 15.3s InterpolantComputationTime, 227 NumberOfCodeBlocks, 227 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 216 ConstructedInterpolants, 0 QuantifiedInterpolants, 239880 SizeOfPredicates, 203 NumberOfNonLiveVariables, 566 ConjunctsInSsa, 274 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 102/296 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/inc_cas_prop1.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_12-37-56-623.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/inc_cas_prop1.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_12-37-56-623.csv Received shutdown request...