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/lustre/car_2.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 15:52:24,135 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 15:52:24,137 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 15:52:24,148 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 15:52:24,149 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 15:52:24,150 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 15:52:24,153 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 15:52:24,159 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 15:52:24,162 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 15:52:24,163 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 15:52:24,164 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 15:52:24,164 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 15:52:24,165 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 15:52:24,175 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 15:52:24,176 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 15:52:24,176 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 15:52:24,179 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 15:52:24,180 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 15:52:24,185 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 15:52:24,186 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 15:52:24,187 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 15:52:24,189 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 15:52:24,189 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 15:52:24,189 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 15:52:24,193 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 15:52:24,193 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 15:52:24,194 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 15:52:24,195 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 15:52:24,198 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 15:52:24,198 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 15:52:24,199 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 15:52:24,200 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 15:52:24,200 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 15:52:24,200 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 15:52:24,201 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 15:52:24,201 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 15:52:24,214 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 15:52:24,214 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 15:52:24,214 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 15:52:24,215 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 15:52:24,215 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 15:52:24,216 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 15:52:24,216 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 15:52:24,216 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 15:52:24,216 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 15:52:24,216 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 15:52:24,217 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:52:24,217 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 15:52:24,217 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 15:52:24,217 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 15:52:24,217 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 15:52:24,217 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 15:52:24,218 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 15:52:24,218 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 15:52:24,218 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 15:52:24,219 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 15:52:24,219 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 15:52:24,270 INFO ]: Repository-Root is: /tmp [2018-06-22 15:52:24,288 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 15:52:24,292 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 15:52:24,294 INFO ]: Initializing SmtParser... [2018-06-22 15:52:24,294 INFO ]: SmtParser initialized [2018-06-22 15:52:24,295 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/car_2.smt2 [2018-06-22 15:52:24,296 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 15:52:24,388 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/car_2.smt2 unknown [2018-06-22 15:52:24,744 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/car_2.smt2 [2018-06-22 15:52:24,749 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 15:52:24,754 INFO ]: Walking toolchain with 4 elements. [2018-06-22 15:52:24,754 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 15:52:24,754 INFO ]: Initializing ChcToBoogie... [2018-06-22 15:52:24,754 INFO ]: ChcToBoogie initialized [2018-06-22 15:52:24,757 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:52:24" (1/1) ... [2018-06-22 15:52:24,804 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:52:24 Unit [2018-06-22 15:52:24,804 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 15:52:24,804 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 15:52:24,804 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 15:52:24,805 INFO ]: Boogie Preprocessor initialized [2018-06-22 15:52:24,825 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:52:24" (1/1) ... [2018-06-22 15:52:24,826 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:52:24" (1/1) ... [2018-06-22 15:52:24,836 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:52:24" (1/1) ... [2018-06-22 15:52:24,836 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:52:24" (1/1) ... [2018-06-22 15:52:24,853 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:52:24" (1/1) ... [2018-06-22 15:52:24,854 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:52:24" (1/1) ... [2018-06-22 15:52:24,855 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:52:24" (1/1) ... [2018-06-22 15:52:24,858 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 15:52:24,858 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 15:52:24,858 INFO ]: Initializing RCFGBuilder... [2018-06-22 15:52:24,858 INFO ]: RCFGBuilder initialized [2018-06-22 15:52:24,859 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:52:24" (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 15:52:24,889 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 15:52:24,889 INFO ]: Found specification of procedure False [2018-06-22 15:52:24,889 INFO ]: Found implementation of procedure False [2018-06-22 15:52:24,889 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 15:52:24,889 INFO ]: Found specification of procedure state [2018-06-22 15:52:24,889 INFO ]: Found implementation of procedure state [2018-06-22 15:52:24,889 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 15:52:24,889 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 15:52:24,889 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 15:52:25,210 INFO ]: Using library mode [2018-06-22 15:52:25,211 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:52:25 BoogieIcfgContainer [2018-06-22 15:52:25,211 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 15:52:25,213 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 15:52:25,213 INFO ]: Initializing TraceAbstraction... [2018-06-22 15:52:25,216 INFO ]: TraceAbstraction initialized [2018-06-22 15:52:25,216 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:52:24" (1/3) ... [2018-06-22 15:52:25,217 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@792ef336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 03:52:25, skipping insertion in model container [2018-06-22 15:52:25,217 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:52:24" (2/3) ... [2018-06-22 15:52:25,217 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@792ef336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 03:52:25, skipping insertion in model container [2018-06-22 15:52:25,217 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:52:25" (3/3) ... [2018-06-22 15:52:25,219 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 15:52:25,228 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 15:52:25,236 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 15:52:25,274 INFO ]: Using default assertion order modulation [2018-06-22 15:52:25,274 INFO ]: Interprodecural is true [2018-06-22 15:52:25,274 INFO ]: Hoare is false [2018-06-22 15:52:25,274 INFO ]: Compute interpolants for FPandBP [2018-06-22 15:52:25,274 INFO ]: Backedges is TWOTRACK [2018-06-22 15:52:25,274 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 15:52:25,274 INFO ]: Difference is false [2018-06-22 15:52:25,274 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 15:52:25,274 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 15:52:25,287 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 15:52:25,297 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 15:52:25,297 INFO ]: Found error trace [2018-06-22 15:52:25,298 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:52:25,298 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:52:25,303 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 15:52:25,305 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:52:25,305 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:52:25,342 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:52:25,342 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:52:25,342 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:52:25,433 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:52:25,618 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 15:52:25,619 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 15:52:25,620 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 15:52:25,621 INFO ]: Interpolant automaton has 4 states [2018-06-22 15:52:25,631 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 15:52:25,632 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:52:25,634 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 15:52:25,715 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:52:25,716 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 15:52:25,716 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 15:52:25,717 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 15:52:25,718 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:52:25,727 INFO ]: With dead ends: 13 [2018-06-22 15:52:25,727 INFO ]: Without dead ends: 13 [2018-06-22 15:52:25,729 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 15:52:25,742 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 15:52:25,765 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 15:52:25,767 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 15:52:25,767 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 15:52:25,769 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 15:52:25,769 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:52:25,769 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 15:52:25,769 INFO ]: Interpolant automaton has 4 states. [2018-06-22 15:52:25,769 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 15:52:25,770 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 15:52:25,770 INFO ]: Found error trace [2018-06-22 15:52:25,771 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:52:25,771 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:52:25,772 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 15:52:25,772 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:52:25,772 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:52:25,773 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:52:25,773 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:52:25,773 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:52:25,847 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:52:26,283 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:52:26,283 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:52:26,283 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-22 15:52:26,300 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:52:26,405 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:52:26,417 INFO ]: Computing forward predicates... [2018-06-22 15:52:27,335 WARN ]: Spent 456.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 15 [2018-06-22 15:52:27,757 WARN ]: Spent 382.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2018-06-22 15:52:27,863 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:52:27,888 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:52:27,888 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 15:52:27,888 INFO ]: Interpolant automaton has 9 states [2018-06-22 15:52:27,889 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 15:52:27,889 INFO ]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-06-22 15:52:27,889 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 15:52:28,168 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:52:28,168 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 15:52:28,171 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 15:52:28,171 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 15:52:28,171 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:52:28,172 INFO ]: With dead ends: 15 [2018-06-22 15:52:28,172 INFO ]: Without dead ends: 15 [2018-06-22 15:52:28,173 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2018-06-22 15:52:28,173 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 15:52:28,175 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 15:52:28,175 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 15:52:28,175 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 15:52:28,175 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 15:52:28,175 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:52:28,175 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 15:52:28,175 INFO ]: Interpolant automaton has 9 states. [2018-06-22 15:52:28,175 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 15:52:28,176 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 15:52:28,176 INFO ]: Found error trace [2018-06-22 15:52:28,176 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:52:28,176 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:52:28,176 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 15:52:28,176 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:52:28,176 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:52:28,177 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:52:28,177 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:52:28,177 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:52:28,246 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:52:28,609 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:52:28,609 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:52:28,609 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 15:52:28,619 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:52:28,693 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:52:28,693 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:52:28,697 INFO ]: Computing forward predicates... [2018-06-22 15:52:29,449 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:52:29,468 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:52:29,468 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-06-22 15:52:29,469 INFO ]: Interpolant automaton has 12 states [2018-06-22 15:52:29,469 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 15:52:29,470 INFO ]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-06-22 15:52:29,470 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-06-22 15:52:29,780 WARN ]: Spent 185.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2018-06-22 15:52:29,987 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:52:29,987 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 15:52:29,987 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 15:52:29,987 INFO ]: Start accepts. Automaton has 12 states. Word has length 17 [2018-06-22 15:52:29,988 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:52:29,988 INFO ]: With dead ends: 19 [2018-06-22 15:52:29,988 INFO ]: Without dead ends: 19 [2018-06-22 15:52:29,989 INFO ]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2018-06-22 15:52:29,989 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 15:52:29,992 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 15:52:29,992 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 15:52:29,993 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 15:52:29,993 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2018-06-22 15:52:29,993 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:52:29,993 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 15:52:29,993 INFO ]: Interpolant automaton has 12 states. [2018-06-22 15:52:29,993 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 15:52:29,994 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 15:52:29,994 INFO ]: Found error trace [2018-06-22 15:52:29,994 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:52:29,994 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:52:29,994 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 3 times [2018-06-22 15:52:29,994 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:52:29,994 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:52:29,995 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:52:29,995 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:52:29,995 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:52:30,085 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:52:30,495 WARN ]: Spent 201.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 13 [2018-06-22 15:52:30,746 INFO ]: Checked inductivity of 36 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:52:30,746 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:52:30,746 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) [2018-06-22 15:52:30,761 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:52:30,883 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-06-22 15:52:30,883 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:52:30,887 INFO ]: Computing forward predicates... [2018-06-22 15:52:31,260 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:52:31,284 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:52:31,284 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2018-06-22 15:52:31,284 INFO ]: Interpolant automaton has 19 states [2018-06-22 15:52:31,285 INFO ]: Constructing interpolant automaton starting with 19 interpolants. [2018-06-22 15:52:31,285 INFO ]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2018-06-22 15:52:31,285 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 19 states. [2018-06-22 15:52:31,842 WARN ]: Spent 242.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2018-06-22 15:52:31,988 WARN ]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2018-06-22 15:52:32,110 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:52:32,110 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 15:52:32,112 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 15:52:32,112 INFO ]: Start accepts. Automaton has 19 states. Word has length 25 [2018-06-22 15:52:32,112 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:52:32,113 INFO ]: With dead ends: 21 [2018-06-22 15:52:32,113 INFO ]: Without dead ends: 21 [2018-06-22 15:52:32,113 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2018-06-22 15:52:32,114 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 15:52:32,117 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 15:52:32,117 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 15:52:32,118 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 15:52:32,118 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 15:52:32,118 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:52:32,118 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 15:52:32,118 INFO ]: Interpolant automaton has 19 states. [2018-06-22 15:52:32,118 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 15:52:32,119 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 15:52:32,119 INFO ]: Found error trace [2018-06-22 15:52:32,119 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:52:32,119 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:52:32,119 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 4 times [2018-06-22 15:52:32,119 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:52:32,119 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:52:32,120 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:52:32,120 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:52:32,120 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:52:32,276 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:52:33,177 WARN ]: Spent 558.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2018-06-22 15:52:33,469 WARN ]: Spent 281.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 80 [2018-06-22 15:52:34,243 WARN ]: Spent 739.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2018-06-22 15:52:34,445 WARN ]: Spent 128.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2018-06-22 15:52:34,627 WARN ]: Spent 132.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2018-06-22 15:52:34,763 WARN ]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2018-06-22 15:52:34,970 WARN ]: Spent 173.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2018-06-22 15:52:35,279 WARN ]: Spent 282.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2018-06-22 15:52:35,442 WARN ]: Spent 139.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2018-06-22 15:52:35,514 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:52:35,514 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:52:35,514 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 15:52:35,520 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 15:52:35,640 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 15:52:35,640 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:52:35,644 INFO ]: Computing forward predicates... [2018-06-22 15:52:36,192 INFO ]: Checked inductivity of 55 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-06-22 15:52:36,212 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:52:36,212 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2018-06-22 15:52:36,212 INFO ]: Interpolant automaton has 24 states [2018-06-22 15:52:36,212 INFO ]: Constructing interpolant automaton starting with 24 interpolants. [2018-06-22 15:52:36,212 INFO ]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2018-06-22 15:52:36,212 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 24 states. [2018-06-22 15:52:36,361 WARN ]: Spent 118.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 33 [2018-06-22 15:52:36,798 WARN ]: Spent 395.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 131 [2018-06-22 15:52:37,473 WARN ]: Spent 628.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 115 [2018-06-22 15:52:38,022 WARN ]: Spent 423.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 120 [2018-06-22 15:52:38,746 WARN ]: Spent 657.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 123 [2018-06-22 15:52:39,382 WARN ]: Spent 506.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 113 [2018-06-22 15:52:40,015 WARN ]: Spent 489.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 113 [2018-06-22 15:52:40,345 WARN ]: Spent 270.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 110 [2018-06-22 15:52:40,414 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:52:40,414 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 15:52:40,415 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 15:52:40,415 INFO ]: Start accepts. Automaton has 24 states. Word has length 29 [2018-06-22 15:52:40,415 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:52:40,416 INFO ]: With dead ends: 25 [2018-06-22 15:52:40,416 INFO ]: Without dead ends: 25 [2018-06-22 15:52:40,417 INFO ]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=225, Invalid=767, Unknown=0, NotChecked=0, Total=992 [2018-06-22 15:52:40,417 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 15:52:40,423 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 15:52:40,423 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 15:52:40,424 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 15:52:40,424 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 29 [2018-06-22 15:52:40,424 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:52:40,424 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 15:52:40,424 INFO ]: Interpolant automaton has 24 states. [2018-06-22 15:52:40,424 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 15:52:40,427 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 15:52:40,427 INFO ]: Found error trace [2018-06-22 15:52:40,427 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:52:40,427 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:52:40,427 INFO ]: Analyzing trace with hash -1494134477, now seen corresponding path program 5 times [2018-06-22 15:52:40,427 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:52:40,427 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:52:40,428 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:52:40,428 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:52:40,428 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:52:40,585 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:52:41,273 WARN ]: Spent 273.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 11 [2018-06-22 15:52:41,496 WARN ]: Spent 172.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 32 [2018-06-22 15:52:41,868 WARN ]: Spent 261.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2018-06-22 15:52:42,235 WARN ]: Spent 324.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 [2018-06-22 15:52:42,655 WARN ]: Spent 400.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 61 [2018-06-22 15:52:43,259 WARN ]: Spent 335.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2018-06-22 15:52:43,439 WARN ]: Spent 123.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 21 [2018-06-22 15:52:43,578 WARN ]: Spent 106.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 12 [2018-06-22 15:52:43,773 INFO ]: Checked inductivity of 105 backedges. 1 proven. 76 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:52:43,773 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:52:43,773 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 15:52:43,779 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 15:52:43,922 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-06-22 15:52:43,923 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:52:43,930 INFO ]: Computing forward predicates... [2018-06-22 15:52:46,012 WARN ]: Spent 443.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 8 [2018-06-22 15:52:46,159 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:52:46,186 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:52:46,186 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2018-06-22 15:52:46,187 INFO ]: Interpolant automaton has 33 states [2018-06-22 15:52:46,187 INFO ]: Constructing interpolant automaton starting with 33 interpolants. [2018-06-22 15:52:46,187 INFO ]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2018-06-22 15:52:46,188 INFO ]: Start difference. First operand 25 states and 26 transitions. Second operand 33 states. [2018-06-22 15:52:46,989 WARN ]: Spent 632.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 130 [2018-06-22 15:52:47,646 WARN ]: Spent 598.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 122 [2018-06-22 15:52:48,275 WARN ]: Spent 581.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 122 [2018-06-22 15:52:48,873 WARN ]: Spent 518.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 118 [2018-06-22 15:52:49,455 WARN ]: Spent 530.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 116 [2018-06-22 15:52:50,006 WARN ]: Spent 500.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 114 [2018-06-22 15:52:50,540 WARN ]: Spent 477.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 115 [2018-06-22 15:52:51,104 WARN ]: Spent 501.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 115 [2018-06-22 15:52:51,655 WARN ]: Spent 461.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 111 [2018-06-22 15:52:52,384 WARN ]: Spent 626.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 116 [2018-06-22 15:52:52,426 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:52:52,426 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 15:52:52,427 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-06-22 15:52:52,427 INFO ]: Start accepts. Automaton has 33 states. Word has length 37 [2018-06-22 15:52:52,427 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:52:52,427 INFO ]: With dead ends: 25 [2018-06-22 15:52:52,427 INFO ]: Without dead ends: 0 [2018-06-22 15:52:52,428 INFO ]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=379, Invalid=1513, Unknown=0, NotChecked=0, Total=1892 [2018-06-22 15:52:52,428 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 15:52:52,429 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 15:52:52,429 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 15:52:52,429 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 15:52:52,429 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 37 [2018-06-22 15:52:52,429 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:52:52,429 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 15:52:52,429 INFO ]: Interpolant automaton has 33 states. [2018-06-22 15:52:52,429 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 15:52:52,429 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 15:52:52,435 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 03:52:52 BoogieIcfgContainer [2018-06-22 15:52:52,435 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 15:52:52,436 INFO ]: Toolchain (without parser) took 27686.57 ms. Allocated memory was 304.6 MB in the beginning and 664.8 MB in the end (delta: 360.2 MB). Free memory was 253.2 MB in the beginning and 271.0 MB in the end (delta: -17.8 MB). Peak memory consumption was 342.4 MB. Max. memory is 3.6 GB. [2018-06-22 15:52:52,436 INFO ]: SmtParser took 0.06 ms. Allocated memory is still 304.6 MB. Free memory is still 270.2 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 15:52:52,437 INFO ]: ChcToBoogie took 50.09 ms. Allocated memory is still 304.6 MB. Free memory was 253.2 MB in the beginning and 251.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:52:52,437 INFO ]: Boogie Preprocessor took 53.16 ms. Allocated memory is still 304.6 MB. Free memory was 251.2 MB in the beginning and 249.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:52:52,437 INFO ]: RCFGBuilder took 352.91 ms. Allocated memory is still 304.6 MB. Free memory was 249.1 MB in the beginning and 233.1 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:52:52,445 INFO ]: TraceAbstraction took 27222.23 ms. Allocated memory was 304.6 MB in the beginning and 664.8 MB in the end (delta: 360.2 MB). Free memory was 233.1 MB in the beginning and 271.0 MB in the end (delta: -37.8 MB). Peak memory consumption was 322.3 MB. Max. memory is 3.6 GB. [2018-06-22 15:52:52,447 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.06 ms. Allocated memory is still 304.6 MB. Free memory is still 270.2 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 50.09 ms. Allocated memory is still 304.6 MB. Free memory was 253.2 MB in the beginning and 251.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 53.16 ms. Allocated memory is still 304.6 MB. Free memory was 251.2 MB in the beginning and 249.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 352.91 ms. Allocated memory is still 304.6 MB. Free memory was 249.1 MB in the beginning and 233.1 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 27222.23 ms. Allocated memory was 304.6 MB in the beginning and 664.8 MB in the end (delta: 360.2 MB). Free memory was 233.1 MB in the beginning and 271.0 MB in the end (delta: -37.8 MB). Peak memory consumption was 322.3 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, 27.1s OverallTime, 6 OverallIterations, 8 TraceHistogramMax, 12.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 63 SDtfs, 234 SDslu, 338 SDs, 0 SdLazy, 296 SolverSat, 289 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 210 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 21.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred 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: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 13.4s InterpolantComputationTime, 251 NumberOfCodeBlocks, 251 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 240 ConstructedInterpolants, 0 QuantifiedInterpolants, 82440 SizeOfPredicates, 187 NumberOfNonLiveVariables, 2937 ConjunctsInSsa, 233 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 119/418 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/car_2.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_15-52-52-460.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/car_2.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_15-52-52-460.csv Received shutdown request...