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_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/lustre/speed2_e8_449_e8_517.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 09:42:33,106 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 09:42:33,108 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 09:42:33,122 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 09:42:33,122 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 09:42:33,123 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 09:42:33,126 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 09:42:33,128 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 09:42:33,129 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 09:42:33,131 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 09:42:33,132 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 09:42:33,132 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 09:42:33,135 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 09:42:33,136 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 09:42:33,137 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 09:42:33,137 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 09:42:33,141 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 09:42:33,142 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 09:42:33,152 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 09:42:33,155 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 09:42:33,157 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 09:42:33,158 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 09:42:33,159 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 09:42:33,159 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 09:42:33,161 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 09:42:33,162 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 09:42:33,163 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 09:42:33,163 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 09:42:33,164 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 09:42:33,164 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 09:42:33,168 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 09:42:33,169 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 09:42:33,169 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 09:42:33,169 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 09:42:33,170 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 09:42:33,170 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 09:42:33,185 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 09:42:33,186 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 09:42:33,186 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 09:42:33,186 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 09:42:33,187 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 09:42:33,188 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 09:42:33,188 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 09:42:33,188 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 09:42:33,188 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 09:42:33,188 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 09:42:33,188 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 09:42:33,189 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 09:42:33,189 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 09:42:33,189 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 09:42:33,189 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 09:42:33,189 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 09:42:33,189 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 09:42:33,191 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 09:42:33,191 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 09:42:33,234 INFO ]: Repository-Root is: /tmp [2018-06-22 09:42:33,251 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 09:42:33,257 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 09:42:33,258 INFO ]: Initializing SmtParser... [2018-06-22 09:42:33,258 INFO ]: SmtParser initialized [2018-06-22 09:42:33,259 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/speed2_e8_449_e8_517.smt2 [2018-06-22 09:42:33,261 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 09:42:33,350 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/speed2_e8_449_e8_517.smt2 unknown [2018-06-22 09:42:33,561 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/speed2_e8_449_e8_517.smt2 [2018-06-22 09:42:33,565 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 09:42:33,571 INFO ]: Walking toolchain with 4 elements. [2018-06-22 09:42:33,571 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 09:42:33,571 INFO ]: Initializing ChcToBoogie... [2018-06-22 09:42:33,572 INFO ]: ChcToBoogie initialized [2018-06-22 09:42:33,575 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 09:42:33" (1/1) ... [2018-06-22 09:42:33,641 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:42:33 Unit [2018-06-22 09:42:33,641 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 09:42:33,642 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 09:42:33,642 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 09:42:33,642 INFO ]: Boogie Preprocessor initialized [2018-06-22 09:42:33,662 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:42:33" (1/1) ... [2018-06-22 09:42:33,662 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:42:33" (1/1) ... [2018-06-22 09:42:33,669 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:42:33" (1/1) ... [2018-06-22 09:42:33,670 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:42:33" (1/1) ... [2018-06-22 09:42:33,681 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:42:33" (1/1) ... [2018-06-22 09:42:33,682 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:42:33" (1/1) ... [2018-06-22 09:42:33,683 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:42:33" (1/1) ... [2018-06-22 09:42:33,694 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 09:42:33,695 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 09:42:33,695 INFO ]: Initializing RCFGBuilder... [2018-06-22 09:42:33,695 INFO ]: RCFGBuilder initialized [2018-06-22 09:42:33,696 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:42:33" (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 09:42:33,714 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 09:42:33,714 INFO ]: Found specification of procedure gotoProc [2018-06-22 09:42:33,714 INFO ]: Found implementation of procedure gotoProc [2018-06-22 09:42:33,714 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 09:42:33,714 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 09:42:33,714 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 09:42:34,084 INFO ]: Using library mode [2018-06-22 09:42:34,084 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 09:42:34 BoogieIcfgContainer [2018-06-22 09:42:34,084 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 09:42:34,089 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 09:42:34,089 INFO ]: Initializing TraceAbstraction... [2018-06-22 09:42:34,093 INFO ]: TraceAbstraction initialized [2018-06-22 09:42:34,093 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 09:42:33" (1/3) ... [2018-06-22 09:42:34,094 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c5298c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 09:42:34, skipping insertion in model container [2018-06-22 09:42:34,094 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:42:33" (2/3) ... [2018-06-22 09:42:34,094 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c5298c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 09:42:34, skipping insertion in model container [2018-06-22 09:42:34,094 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 09:42:34" (3/3) ... [2018-06-22 09:42:34,097 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 09:42:34,106 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 09:42:34,115 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 09:42:34,160 INFO ]: Using default assertion order modulation [2018-06-22 09:42:34,161 INFO ]: Interprodecural is true [2018-06-22 09:42:34,161 INFO ]: Hoare is false [2018-06-22 09:42:34,161 INFO ]: Compute interpolants for FPandBP [2018-06-22 09:42:34,161 INFO ]: Backedges is TWOTRACK [2018-06-22 09:42:34,161 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 09:42:34,161 INFO ]: Difference is false [2018-06-22 09:42:34,161 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 09:42:34,161 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 09:42:34,180 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 09:42:34,193 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 09:42:34,193 INFO ]: Found error trace [2018-06-22 09:42:34,194 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 09:42:34,195 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 09:42:34,201 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-22 09:42:34,203 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 09:42:34,203 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 09:42:34,241 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:42:34,241 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 09:42:34,241 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:42:34,306 INFO ]: Conjunction of SSA is unsat [2018-06-22 09:42:34,390 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 09:42:34,392 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 09:42:34,392 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 09:42:34,393 INFO ]: Interpolant automaton has 3 states [2018-06-22 09:42:34,404 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 09:42:34,404 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 09:42:34,406 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 09:42:34,493 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 09:42:34,493 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 09:42:34,494 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 09:42:34,495 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 09:42:34,495 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 09:42:34,506 INFO ]: With dead ends: 9 [2018-06-22 09:42:34,506 INFO ]: Without dead ends: 9 [2018-06-22 09:42:34,509 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 09:42:34,528 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 09:42:34,553 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 09:42:34,555 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 09:42:34,556 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 09:42:34,557 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 09:42:34,557 INFO ]: Finished accepts. word is rejected. [2018-06-22 09:42:34,557 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 09:42:34,557 INFO ]: Interpolant automaton has 3 states. [2018-06-22 09:42:34,557 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 09:42:34,558 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 09:42:34,558 INFO ]: Found error trace [2018-06-22 09:42:34,558 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 09:42:34,558 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 09:42:34,558 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-22 09:42:34,558 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 09:42:34,558 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 09:42:34,560 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:42:34,560 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 09:42:34,560 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:42:34,665 INFO ]: Conjunction of SSA is unsat [2018-06-22 09:42:34,920 WARN ]: Spent 125.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 14 [2018-06-22 09:42:35,116 WARN ]: Spent 182.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2018-06-22 09:42:35,118 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 09:42:35,118 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 09:42:35,118 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 09:42:35,132 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 09:42:35,241 INFO ]: Conjunction of SSA is unsat [2018-06-22 09:42:35,261 INFO ]: Computing forward predicates... [2018-06-22 09:42:38,029 WARN ]: Spent 204.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2018-06-22 09:42:38,035 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 09:42:38,055 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 09:42:38,055 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-22 09:42:38,056 INFO ]: Interpolant automaton has 6 states [2018-06-22 09:42:38,056 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 09:42:38,056 INFO ]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-06-22 09:42:38,056 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-06-22 09:42:38,261 WARN ]: Spent 155.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2018-06-22 09:42:38,271 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 09:42:38,271 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 09:42:38,271 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 09:42:38,271 INFO ]: Start accepts. Automaton has 6 states. Word has length 8 [2018-06-22 09:42:38,271 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 09:42:38,272 INFO ]: With dead ends: 10 [2018-06-22 09:42:38,272 INFO ]: Without dead ends: 10 [2018-06-22 09:42:38,272 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-06-22 09:42:38,273 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 09:42:38,274 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 09:42:38,274 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 09:42:38,274 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 09:42:38,275 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 09:42:38,275 INFO ]: Finished accepts. word is rejected. [2018-06-22 09:42:38,275 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 09:42:38,275 INFO ]: Interpolant automaton has 6 states. [2018-06-22 09:42:38,275 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 09:42:38,275 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 09:42:38,275 INFO ]: Found error trace [2018-06-22 09:42:38,275 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 09:42:38,275 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 09:42:38,275 INFO ]: Analyzing trace with hash -2043975570, now seen corresponding path program 2 times [2018-06-22 09:42:38,276 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 09:42:38,276 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 09:42:38,276 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:42:38,276 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 09:42:38,276 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:42:38,386 INFO ]: Conjunction of SSA is unsat [2018-06-22 09:42:38,633 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 09:42:38,633 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 09:42:38,633 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 09:42:38,639 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 09:42:38,712 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 09:42:38,712 INFO ]: Conjunction of SSA is unsat [2018-06-22 09:42:38,717 INFO ]: Computing forward predicates... [2018-06-22 09:42:38,929 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 09:42:39,010 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 09:42:39,574 WARN ]: Spent 103.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2018-06-22 09:42:40,061 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 09:42:40,093 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 09:42:40,093 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-06-22 09:42:40,093 INFO ]: Interpolant automaton has 8 states [2018-06-22 09:42:40,094 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 09:42:40,094 INFO ]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-06-22 09:42:40,094 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 8 states. [2018-06-22 09:42:40,424 WARN ]: Spent 213.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2018-06-22 09:42:40,473 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 09:42:40,473 INFO ]: Finished difference Result 6 states and 6 transitions. [2018-06-22 09:42:40,474 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 09:42:40,474 INFO ]: Start accepts. Automaton has 8 states. Word has length 9 [2018-06-22 09:42:40,474 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 09:42:40,474 INFO ]: With dead ends: 6 [2018-06-22 09:42:40,474 INFO ]: Without dead ends: 0 [2018-06-22 09:42:40,474 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-06-22 09:42:40,474 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 09:42:40,474 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 09:42:40,474 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 09:42:40,474 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 09:42:40,475 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2018-06-22 09:42:40,475 INFO ]: Finished accepts. word is rejected. [2018-06-22 09:42:40,475 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 09:42:40,475 INFO ]: Interpolant automaton has 8 states. [2018-06-22 09:42:40,475 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 09:42:40,475 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 09:42:40,479 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 09:42:40 BoogieIcfgContainer [2018-06-22 09:42:40,479 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 09:42:40,479 INFO ]: Toolchain (without parser) took 6913.60 ms. Allocated memory was 304.1 MB in the beginning and 389.5 MB in the end (delta: 85.5 MB). Free memory was 256.5 MB in the beginning and 240.5 MB in the end (delta: 16.0 MB). Peak memory consumption was 101.4 MB. Max. memory is 3.6 GB. [2018-06-22 09:42:40,480 INFO ]: SmtParser took 0.10 ms. Allocated memory is still 304.1 MB. Free memory is still 269.6 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 09:42:40,480 INFO ]: ChcToBoogie took 70.04 ms. Allocated memory is still 304.1 MB. Free memory was 256.5 MB in the beginning and 253.5 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-22 09:42:40,481 INFO ]: Boogie Preprocessor took 52.74 ms. Allocated memory is still 304.1 MB. Free memory was 253.5 MB in the beginning and 252.5 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-22 09:42:40,481 INFO ]: RCFGBuilder took 389.58 ms. Allocated memory is still 304.1 MB. Free memory was 252.5 MB in the beginning and 238.5 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 3.6 GB. [2018-06-22 09:42:40,483 INFO ]: TraceAbstraction took 6389.80 ms. Allocated memory was 304.1 MB in the beginning and 389.5 MB in the end (delta: 85.5 MB). Free memory was 238.5 MB in the beginning and 240.5 MB in the end (delta: -2.0 MB). Peak memory consumption was 83.4 MB. Max. memory is 3.6 GB. [2018-06-22 09:42:40,486 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.10 ms. Allocated memory is still 304.1 MB. Free memory is still 269.6 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 70.04 ms. Allocated memory is still 304.1 MB. Free memory was 256.5 MB in the beginning and 253.5 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 52.74 ms. Allocated memory is still 304.1 MB. Free memory was 253.5 MB in the beginning and 252.5 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 389.58 ms. Allocated memory is still 304.1 MB. Free memory was 252.5 MB in the beginning and 238.5 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 6389.80 ms. Allocated memory was 304.1 MB in the beginning and 389.5 MB in the end (delta: 85.5 MB). Free memory was 238.5 MB in the beginning and 240.5 MB in the end (delta: -2.0 MB). Peak memory consumption was 83.4 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 2 procedures, 10 locations, 1 error locations. SAFE Result, 6.3s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 17 SDtfs, 0 SDslu, 32 SDs, 0 SdLazy, 26 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred in iteration=0, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.9s InterpolantComputationTime, 41 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 2712 SizeOfPredicates, 23 NumberOfNonLiveVariables, 439 ConjunctsInSsa, 127 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 0/8 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/speed2_e8_449_e8_517.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_09-42-40-500.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/speed2_e8_449_e8_517.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_09-42-40-500.csv Received shutdown request...