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/readwrit.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 19:45:06,154 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 19:45:06,156 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 19:45:06,169 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 19:45:06,170 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 19:45:06,171 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 19:45:06,172 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 19:45:06,174 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 19:45:06,175 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 19:45:06,176 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 19:45:06,177 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 19:45:06,177 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 19:45:06,178 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 19:45:06,179 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 19:45:06,180 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 19:45:06,180 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 19:45:06,182 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 19:45:06,184 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 19:45:06,185 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 19:45:06,186 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 19:45:06,188 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 19:45:06,198 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 19:45:06,199 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 19:45:06,199 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 19:45:06,200 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 19:45:06,201 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 19:45:06,201 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 19:45:06,202 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 19:45:06,203 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 19:45:06,203 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 19:45:06,204 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 19:45:06,205 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 19:45:06,205 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 19:45:06,213 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 19:45:06,214 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 19:45:06,214 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 19:45:06,235 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 19:45:06,235 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 19:45:06,235 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 19:45:06,235 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 19:45:06,236 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 19:45:06,236 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 19:45:06,237 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 19:45:06,237 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 19:45:06,237 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 19:45:06,238 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 19:45:06,238 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 19:45:06,238 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 19:45:06,238 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 19:45:06,238 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 19:45:06,238 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 19:45:06,239 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 19:45:06,239 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 19:45:06,241 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 19:45:06,241 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 19:45:06,243 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 19:45:06,244 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 19:45:06,290 INFO ]: Repository-Root is: /tmp [2018-06-22 19:45:06,306 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 19:45:06,310 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 19:45:06,311 INFO ]: Initializing SmtParser... [2018-06-22 19:45:06,311 INFO ]: SmtParser initialized [2018-06-22 19:45:06,312 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/readwrit.smt2 [2018-06-22 19:45:06,313 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 19:45:06,404 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/readwrit.smt2 unknown [2018-06-22 19:45:07,079 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/readwrit.smt2 [2018-06-22 19:45:07,083 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 19:45:07,089 INFO ]: Walking toolchain with 4 elements. [2018-06-22 19:45:07,089 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 19:45:07,089 INFO ]: Initializing ChcToBoogie... [2018-06-22 19:45:07,089 INFO ]: ChcToBoogie initialized [2018-06-22 19:45:07,092 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:45:07" (1/1) ... [2018-06-22 19:45:07,179 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:45:07 Unit [2018-06-22 19:45:07,179 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 19:45:07,180 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 19:45:07,180 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 19:45:07,180 INFO ]: Boogie Preprocessor initialized [2018-06-22 19:45:07,208 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:45:07" (1/1) ... [2018-06-22 19:45:07,209 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:45:07" (1/1) ... [2018-06-22 19:45:07,225 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:45:07" (1/1) ... [2018-06-22 19:45:07,225 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:45:07" (1/1) ... [2018-06-22 19:45:07,238 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:45:07" (1/1) ... [2018-06-22 19:45:07,240 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:45:07" (1/1) ... [2018-06-22 19:45:07,253 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:45:07" (1/1) ... [2018-06-22 19:45:07,258 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 19:45:07,258 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 19:45:07,258 INFO ]: Initializing RCFGBuilder... [2018-06-22 19:45:07,258 INFO ]: RCFGBuilder initialized [2018-06-22 19:45:07,264 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:45:07" (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 19:45:07,277 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 19:45:07,277 INFO ]: Found specification of procedure False [2018-06-22 19:45:07,277 INFO ]: Found implementation of procedure False [2018-06-22 19:45:07,277 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 19:45:07,277 INFO ]: Found specification of procedure state [2018-06-22 19:45:07,277 INFO ]: Found implementation of procedure state [2018-06-22 19:45:07,277 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 19:45:07,277 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 19:45:07,277 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 19:45:07,897 INFO ]: Using library mode [2018-06-22 19:45:07,897 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:45:07 BoogieIcfgContainer [2018-06-22 19:45:07,947 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 19:45:07,948 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 19:45:07,948 INFO ]: Initializing TraceAbstraction... [2018-06-22 19:45:07,954 INFO ]: TraceAbstraction initialized [2018-06-22 19:45:07,954 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:45:07" (1/3) ... [2018-06-22 19:45:07,955 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ed047b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 07:45:07, skipping insertion in model container [2018-06-22 19:45:07,955 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:45:07" (2/3) ... [2018-06-22 19:45:07,955 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ed047b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 07:45:07, skipping insertion in model container [2018-06-22 19:45:07,955 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:45:07" (3/3) ... [2018-06-22 19:45:07,957 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 19:45:07,967 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 19:45:07,977 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 19:45:08,021 INFO ]: Using default assertion order modulation [2018-06-22 19:45:08,021 INFO ]: Interprodecural is true [2018-06-22 19:45:08,021 INFO ]: Hoare is false [2018-06-22 19:45:08,021 INFO ]: Compute interpolants for FPandBP [2018-06-22 19:45:08,021 INFO ]: Backedges is TWOTRACK [2018-06-22 19:45:08,021 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 19:45:08,021 INFO ]: Difference is false [2018-06-22 19:45:08,021 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 19:45:08,021 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 19:45:08,034 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 19:45:08,044 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 19:45:08,044 INFO ]: Found error trace [2018-06-22 19:45:08,045 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:45:08,045 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:45:08,049 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 19:45:08,050 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:45:08,051 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:45:08,083 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:45:08,083 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:45:08,083 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:45:08,238 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:45:08,482 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 19:45:08,484 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 19:45:08,484 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 19:45:08,485 INFO ]: Interpolant automaton has 4 states [2018-06-22 19:45:08,496 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 19:45:08,496 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 19:45:08,498 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 19:45:08,662 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:45:08,662 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 19:45:08,663 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 19:45:08,664 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 19:45:08,665 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:45:08,679 INFO ]: With dead ends: 13 [2018-06-22 19:45:08,679 INFO ]: Without dead ends: 13 [2018-06-22 19:45:08,681 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 19:45:08,699 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 19:45:08,737 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 19:45:08,741 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 19:45:08,741 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 19:45:08,743 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 19:45:08,743 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:45:08,743 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 19:45:08,743 INFO ]: Interpolant automaton has 4 states. [2018-06-22 19:45:08,743 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 19:45:08,745 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 19:45:08,745 INFO ]: Found error trace [2018-06-22 19:45:08,745 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:45:08,745 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:45:08,745 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 19:45:08,745 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:45:08,745 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:45:08,746 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:45:08,746 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:45:08,746 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:45:08,960 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:45:10,126 WARN ]: Spent 889.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2018-06-22 19:45:10,234 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:45:10,234 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:45:10,234 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 19:45:10,244 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:45:10,440 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:45:10,449 INFO ]: Computing forward predicates... [2018-06-22 19:45:10,756 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:45:10,772 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:45:10,784 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:45:11,914 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:45:11,958 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:45:11,958 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-22 19:45:11,959 INFO ]: Interpolant automaton has 8 states [2018-06-22 19:45:11,959 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 19:45:11,959 INFO ]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-06-22 19:45:11,959 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-22 19:45:12,310 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:45:12,310 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 19:45:12,311 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 19:45:12,311 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-22 19:45:12,311 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:45:12,311 INFO ]: With dead ends: 15 [2018-06-22 19:45:12,311 INFO ]: Without dead ends: 15 [2018-06-22 19:45:12,312 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2018-06-22 19:45:12,312 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 19:45:12,316 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 19:45:12,316 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 19:45:12,316 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 19:45:12,316 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 19:45:12,317 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:45:12,317 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 19:45:12,317 INFO ]: Interpolant automaton has 8 states. [2018-06-22 19:45:12,317 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 19:45:12,317 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 19:45:12,317 INFO ]: Found error trace [2018-06-22 19:45:12,317 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:45:12,317 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:45:12,317 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 19:45:12,317 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:45:12,317 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:45:12,318 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:45:12,318 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:45:12,318 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:45:12,482 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:45:12,961 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:45:12,961 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:45:12,988 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 19:45:12,994 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 19:45:13,216 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 19:45:13,216 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:45:13,224 INFO ]: Computing forward predicates... [2018-06-22 19:45:13,307 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 19:45:14,119 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:45:14,152 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:45:14,152 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-06-22 19:45:14,152 INFO ]: Interpolant automaton has 12 states [2018-06-22 19:45:14,152 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 19:45:14,153 INFO ]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2018-06-22 19:45:14,153 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-06-22 19:45:14,595 WARN ]: Spent 248.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2018-06-22 19:45:14,857 WARN ]: Spent 219.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 56 [2018-06-22 19:45:15,046 WARN ]: Spent 156.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 59 [2018-06-22 19:45:15,102 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:45:15,102 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 19:45:15,104 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 19:45:15,104 INFO ]: Start accepts. Automaton has 12 states. Word has length 17 [2018-06-22 19:45:15,104 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:45:15,104 INFO ]: With dead ends: 17 [2018-06-22 19:45:15,104 INFO ]: Without dead ends: 17 [2018-06-22 19:45:15,105 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2018-06-22 19:45:15,105 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 19:45:15,108 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 19:45:15,108 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 19:45:15,108 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 19:45:15,108 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 19:45:15,108 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:45:15,109 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 19:45:15,109 INFO ]: Interpolant automaton has 12 states. [2018-06-22 19:45:15,109 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 19:45:15,109 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 19:45:15,109 INFO ]: Found error trace [2018-06-22 19:45:15,109 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:45:15,109 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:45:15,109 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 19:45:15,109 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:45:15,109 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:45:15,110 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:45:15,110 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:45:15,110 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:45:15,275 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:45:16,095 WARN ]: Spent 473.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2018-06-22 19:45:16,340 WARN ]: Spent 130.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2018-06-22 19:45:16,532 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:45:16,532 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:45:16,532 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 19:45:16,546 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 19:45:16,874 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 19:45:16,874 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:45:16,885 INFO ]: Computing forward predicates... [2018-06-22 19:45:17,563 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:45:17,587 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:45:17,587 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2018-06-22 19:45:17,587 INFO ]: Interpolant automaton has 16 states [2018-06-22 19:45:17,588 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 19:45:17,588 INFO ]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2018-06-22 19:45:17,588 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 16 states. [2018-06-22 19:45:18,018 WARN ]: Spent 347.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 96 [2018-06-22 19:45:18,444 WARN ]: Spent 374.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 80 [2018-06-22 19:45:18,768 WARN ]: Spent 261.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 86 [2018-06-22 19:45:19,020 WARN ]: Spent 219.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2018-06-22 19:45:19,033 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:45:19,033 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 19:45:19,034 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 19:45:19,034 INFO ]: Start accepts. Automaton has 16 states. Word has length 21 [2018-06-22 19:45:19,034 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:45:19,034 INFO ]: With dead ends: 13 [2018-06-22 19:45:19,034 INFO ]: Without dead ends: 0 [2018-06-22 19:45:19,034 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2018-06-22 19:45:19,034 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 19:45:19,034 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 19:45:19,034 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 19:45:19,034 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 19:45:19,034 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2018-06-22 19:45:19,034 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:45:19,034 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 19:45:19,034 INFO ]: Interpolant automaton has 16 states. [2018-06-22 19:45:19,034 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 19:45:19,034 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 19:45:19,039 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 07:45:19 BoogieIcfgContainer [2018-06-22 19:45:19,039 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 19:45:19,039 INFO ]: Toolchain (without parser) took 11955.52 ms. Allocated memory was 308.8 MB in the beginning and 533.7 MB in the end (delta: 224.9 MB). Free memory was 231.2 MB in the beginning and 418.9 MB in the end (delta: -187.7 MB). Peak memory consumption was 37.2 MB. Max. memory is 3.6 GB. [2018-06-22 19:45:19,040 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 308.8 MB. Free memory is still 274.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 19:45:19,040 INFO ]: ChcToBoogie took 90.26 ms. Allocated memory is still 308.8 MB. Free memory was 230.2 MB in the beginning and 227.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-22 19:45:19,041 INFO ]: Boogie Preprocessor took 78.05 ms. Allocated memory is still 308.8 MB. Free memory was 227.2 MB in the beginning and 225.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 19:45:19,041 INFO ]: RCFGBuilder took 688.37 ms. Allocated memory was 308.8 MB in the beginning and 325.6 MB in the end (delta: 16.8 MB). Free memory was 225.2 MB in the beginning and 285.7 MB in the end (delta: -60.5 MB). Peak memory consumption was 43.0 MB. Max. memory is 3.6 GB. [2018-06-22 19:45:19,042 INFO ]: TraceAbstraction took 11090.62 ms. Allocated memory was 325.6 MB in the beginning and 533.7 MB in the end (delta: 208.1 MB). Free memory was 285.7 MB in the beginning and 418.9 MB in the end (delta: -133.2 MB). Peak memory consumption was 75.0 MB. Max. memory is 3.6 GB. [2018-06-22 19:45:19,044 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 308.8 MB. Free memory is still 274.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 90.26 ms. Allocated memory is still 308.8 MB. Free memory was 230.2 MB in the beginning and 227.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 78.05 ms. Allocated memory is still 308.8 MB. Free memory was 227.2 MB in the beginning and 225.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 688.37 ms. Allocated memory was 308.8 MB in the beginning and 325.6 MB in the end (delta: 16.8 MB). Free memory was 225.2 MB in the beginning and 285.7 MB in the end (delta: -60.5 MB). Peak memory consumption was 43.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 11090.62 ms. Allocated memory was 325.6 MB in the beginning and 533.7 MB in the end (delta: 208.1 MB). Free memory was 285.7 MB in the beginning and 418.9 MB in the end (delta: -133.2 MB). Peak memory consumption was 75.0 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, 11.0s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 2.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 41 SDtfs, 37 SDslu, 148 SDs, 0 SdLazy, 129 SolverSat, 54 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 88 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 5.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=3, 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 6.3s InterpolantComputationTime, 111 NumberOfCodeBlocks, 111 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 104 ConstructedInterpolants, 0 QuantifiedInterpolants, 17692 SizeOfPredicates, 85 NumberOfNonLiveVariables, 4410 ConjunctsInSsa, 116 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 20/68 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/readwrit.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_19-45-19-053.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/readwrit.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_19-45-19-053.csv Received shutdown request...