java -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/chccomp2018/chcToBoogie_automizer.epf -i /storage/chc-comp/llreve-bench/smt2/arrays/heap__clearstr.array.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 11:42:24,135 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 11:42:24,138 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 11:42:24,153 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 11:42:24,153 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 11:42:24,156 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 11:42:24,158 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 11:42:24,160 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 11:42:24,162 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 11:42:24,164 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 11:42:24,165 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 11:42:24,165 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 11:42:24,166 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 11:42:24,169 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 11:42:24,169 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 11:42:24,170 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 11:42:24,171 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 11:42:24,181 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 11:42:24,183 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 11:42:24,184 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 11:42:24,188 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 11:42:24,190 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 11:42:24,190 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 11:42:24,190 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 11:42:24,192 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 11:42:24,193 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 11:42:24,194 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 11:42:24,194 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 11:42:24,198 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 11:42:24,198 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 11:42:24,199 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 11:42:24,199 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 11:42:24,200 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 11:42:24,200 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 11:42:24,204 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 11:42:24,205 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 11:42:24,226 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 11:42:24,227 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 11:42:24,227 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 11:42:24,227 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 11:42:24,230 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 11:42:24,230 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 11:42:24,230 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 11:42:24,230 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 11:42:24,230 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 11:42:24,231 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 11:42:24,231 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 11:42:24,231 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 11:42:24,231 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 11:42:24,231 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 11:42:24,231 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 11:42:24,232 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 11:42:24,232 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 11:42:24,236 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 11:42:24,236 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 11:42:24,294 INFO ]: Repository-Root is: /tmp [2018-06-18 11:42:24,311 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 11:42:24,317 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 11:42:24,319 INFO ]: Initializing SmtParser... [2018-06-18 11:42:24,319 INFO ]: SmtParser initialized [2018-06-18 11:42:24,320 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/llreve-bench/smt2/arrays/heap__clearstr.array.smt2 [2018-06-18 11:42:24,323 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 [2018-06-18 11:42:24,421 INFO ]: Executing SMT file /storage/chc-comp/llreve-bench/smt2/arrays/heap__clearstr.array.smt2 unknown de.uni_freiburg.informatik.ultimate.plugins.generator.treeautomizer.parsing.HornClauseParserScript$1@2f5d9f08 [2018-06-18 11:42:24,597 INFO ]: Succesfully executed SMT file /storage/chc-comp/llreve-bench/smt2/arrays/heap__clearstr.array.smt2 [2018-06-18 11:42:24,611 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 11:42:24,619 INFO ]: Walking toolchain with 4 elements. [2018-06-18 11:42:24,620 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 11:42:24,620 INFO ]: Initializing ChcToBoogie... [2018-06-18 11:42:24,620 INFO ]: ChcToBoogie initialized [2018-06-18 11:42:24,628 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 11:42:24" (1/1) ... [2018-06-18 11:42:24,678 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 11:42:24 Unit [2018-06-18 11:42:24,678 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 11:42:24,679 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 11:42:24,680 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 11:42:24,680 INFO ]: Boogie Preprocessor initialized [2018-06-18 11:42:24,706 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 11:42:24" (1/1) ... [2018-06-18 11:42:24,706 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 11:42:24" (1/1) ... [2018-06-18 11:42:24,715 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 11:42:24" (1/1) ... [2018-06-18 11:42:24,715 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 11:42:24" (1/1) ... [2018-06-18 11:42:24,719 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 11:42:24" (1/1) ... [2018-06-18 11:42:24,721 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 11:42:24" (1/1) ... [2018-06-18 11:42:24,722 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 11:42:24" (1/1) ... [2018-06-18 11:42:24,724 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 11:42:24,725 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 11:42:24,725 INFO ]: Initializing RCFGBuilder... [2018-06-18 11:42:24,725 INFO ]: RCFGBuilder initialized [2018-06-18 11:42:24,726 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 11:42:24" (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) [2018-06-18 11:42:24,754 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 11:42:24,754 INFO ]: Found specification of procedure False [2018-06-18 11:42:24,754 INFO ]: Found implementation of procedure False [2018-06-18 11:42:24,754 INFO ]: Specification and implementation of procedure INV_MAIN_42 given in one single declaration [2018-06-18 11:42:24,754 INFO ]: Found specification of procedure INV_MAIN_42 [2018-06-18 11:42:24,754 INFO ]: Found implementation of procedure INV_MAIN_42 [2018-06-18 11:42:24,754 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 11:42:24,754 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 11:42:24,754 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 [2018-06-18 11:42:25,061 INFO ]: Using library mode [2018-06-18 11:42:25,061 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 11:42:25 BoogieIcfgContainer [2018-06-18 11:42:25,061 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 11:42:25,063 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 11:42:25,063 INFO ]: Initializing TraceAbstraction... [2018-06-18 11:42:25,068 INFO ]: TraceAbstraction initialized [2018-06-18 11:42:25,068 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 11:42:24" (1/3) ... [2018-06-18 11:42:25,069 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c8b9cec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 11:42:25, skipping insertion in model container [2018-06-18 11:42:25,069 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 11:42:24" (2/3) ... [2018-06-18 11:42:25,070 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c8b9cec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 11:42:25, skipping insertion in model container [2018-06-18 11:42:25,070 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 11:42:25" (3/3) ... [2018-06-18 11:42:25,072 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 11:42:25,083 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 11:42:25,092 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 11:42:25,135 INFO ]: Using default assertion order modulation [2018-06-18 11:42:25,135 INFO ]: Interprodecural is true [2018-06-18 11:42:25,135 INFO ]: Hoare is false [2018-06-18 11:42:25,135 INFO ]: Compute interpolants for FPandBP [2018-06-18 11:42:25,136 INFO ]: Backedges is TWOTRACK [2018-06-18 11:42:25,136 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 11:42:25,136 INFO ]: Difference is false [2018-06-18 11:42:25,136 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 11:42:25,136 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 11:42:25,149 INFO ]: Start isEmpty. Operand 15 states. [2018-06-18 11:42:25,159 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 11:42:25,160 INFO ]: Found error trace [2018-06-18 11:42:25,160 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 11:42:25,161 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 11:42:25,165 INFO ]: Analyzing trace with hash -1283464881, now seen corresponding path program 1 times [2018-06-18 11:42:25,166 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 11:42:25,167 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 11:42:25,206 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 11:42:25,206 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 11:42:25,206 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 11:42:25,259 INFO ]: Conjunction of SSA is unsat [2018-06-18 11:42:25,272 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 11:42:25,545 WARN ]: Spent 179.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 18 [2018-06-18 11:42:25,592 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 11:42:25,594 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 11:42:25,594 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 11:42:25,596 INFO ]: Interpolant automaton has 4 states [2018-06-18 11:42:25,606 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 11:42:25,607 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 11:42:25,609 INFO ]: Start difference. First operand 15 states. Second operand 4 states. [2018-06-18 11:42:25,785 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 11:42:25,785 INFO ]: Finished difference Result 15 states and 22 transitions. [2018-06-18 11:42:25,786 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 11:42:25,787 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 11:42:25,787 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 11:42:25,796 INFO ]: With dead ends: 15 [2018-06-18 11:42:25,796 INFO ]: Without dead ends: 15 [2018-06-18 11:42:25,798 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 11:42:25,815 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 11:42:25,843 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 11:42:25,844 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 11:42:25,845 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 22 transitions. [2018-06-18 11:42:25,847 INFO ]: Start accepts. Automaton has 15 states and 22 transitions. Word has length 9 [2018-06-18 11:42:25,848 INFO ]: Finished accepts. word is rejected. [2018-06-18 11:42:25,848 INFO ]: Abstraction has 15 states and 22 transitions. [2018-06-18 11:42:25,848 INFO ]: Interpolant automaton has 4 states. [2018-06-18 11:42:25,848 INFO ]: Start isEmpty. Operand 15 states and 22 transitions. [2018-06-18 11:42:25,849 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 11:42:25,849 INFO ]: Found error trace [2018-06-18 11:42:25,850 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 11:42:25,850 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 11:42:25,850 INFO ]: Analyzing trace with hash -176390316, now seen corresponding path program 1 times [2018-06-18 11:42:25,850 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 11:42:25,850 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 11:42:25,851 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 11:42:25,851 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 11:42:25,851 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 11:42:25,876 INFO ]: Conjunction of SSA is unsat [2018-06-18 11:42:25,877 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 11:42:26,241 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 11:42:26,243 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 11:42:26,243 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 [2018-06-18 11:42:26,259 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 11:42:26,280 INFO ]: Conjunction of SSA is unsat [2018-06-18 11:42:26,288 INFO ]: Computing forward predicates... [2018-06-18 11:42:26,676 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 11:42:26,699 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 11:42:26,699 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-18 11:42:26,699 INFO ]: Interpolant automaton has 8 states [2018-06-18 11:42:26,700 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-18 11:42:26,700 INFO ]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-06-18 11:42:26,700 INFO ]: Start difference. First operand 15 states and 22 transitions. Second operand 8 states. [2018-06-18 11:42:27,048 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 11:42:27,048 INFO ]: Finished difference Result 19 states and 31 transitions. [2018-06-18 11:42:27,048 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 11:42:27,048 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-18 11:42:27,049 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 11:42:27,049 INFO ]: With dead ends: 19 [2018-06-18 11:42:27,050 INFO ]: Without dead ends: 19 [2018-06-18 11:42:27,050 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-06-18 11:42:27,050 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-18 11:42:27,056 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 15. [2018-06-18 11:42:27,056 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 11:42:27,057 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 22 transitions. [2018-06-18 11:42:27,057 INFO ]: Start accepts. Automaton has 15 states and 22 transitions. Word has length 13 [2018-06-18 11:42:27,057 INFO ]: Finished accepts. word is rejected. [2018-06-18 11:42:27,057 INFO ]: Abstraction has 15 states and 22 transitions. [2018-06-18 11:42:27,058 INFO ]: Interpolant automaton has 8 states. [2018-06-18 11:42:27,058 INFO ]: Start isEmpty. Operand 15 states and 22 transitions. [2018-06-18 11:42:27,058 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 11:42:27,058 INFO ]: Found error trace [2018-06-18 11:42:27,058 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 11:42:27,059 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 11:42:27,059 INFO ]: Analyzing trace with hash -28614159, now seen corresponding path program 1 times [2018-06-18 11:42:27,059 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 11:42:27,059 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 11:42:27,060 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 11:42:27,060 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 11:42:27,060 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 11:42:27,080 INFO ]: Conjunction of SSA is unsat [2018-06-18 11:42:27,081 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 11:42:27,368 WARN ]: Spent 151.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2018-06-18 11:42:27,527 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 11:42:27,527 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 11:42:27,527 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 [2018-06-18 11:42:27,534 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 11:42:27,546 INFO ]: Conjunction of SSA is unsat [2018-06-18 11:42:27,549 INFO ]: Computing forward predicates... [2018-06-18 11:42:27,787 INFO ]: detected equality via solver [2018-06-18 11:42:27,795 INFO ]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 29 [2018-06-18 11:42:27,798 INFO ]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-06-18 11:42:28,002 INFO ]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-06-18 11:42:28,002 INFO ]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:22 [2018-06-18 11:42:28,066 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 11:42:28,096 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 11:42:28,096 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2018-06-18 11:42:28,097 INFO ]: Interpolant automaton has 8 states [2018-06-18 11:42:28,097 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-18 11:42:28,097 INFO ]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-06-18 11:42:28,097 INFO ]: Start difference. First operand 15 states and 22 transitions. Second operand 8 states. [2018-06-18 11:42:28,341 WARN ]: Spent 136.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2018-06-18 11:42:28,497 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 11:42:28,497 INFO ]: Finished difference Result 20 states and 34 transitions. [2018-06-18 11:42:28,497 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 11:42:28,498 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-18 11:42:28,498 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 11:42:28,498 INFO ]: With dead ends: 20 [2018-06-18 11:42:28,498 INFO ]: Without dead ends: 0 [2018-06-18 11:42:28,498 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-06-18 11:42:28,498 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-18 11:42:28,498 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-18 11:42:28,498 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-18 11:42:28,498 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-18 11:42:28,499 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2018-06-18 11:42:28,499 INFO ]: Finished accepts. word is rejected. [2018-06-18 11:42:28,499 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-18 11:42:28,499 INFO ]: Interpolant automaton has 8 states. [2018-06-18 11:42:28,499 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-18 11:42:28,499 INFO ]: Finished isEmpty. No accepting run. [2018-06-18 11:42:28,504 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.06 11:42:28 BoogieIcfgContainer [2018-06-18 11:42:28,504 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-18 11:42:28,505 INFO ]: Toolchain (without parser) took 3893.60 ms. Allocated memory was 306.2 MB in the beginning and 325.6 MB in the end (delta: 19.4 MB). Free memory was 262.6 MB in the beginning and 246.5 MB in the end (delta: 16.1 MB). Peak memory consumption was 35.5 MB. Max. memory is 3.6 GB. [2018-06-18 11:42:28,506 INFO ]: SmtParser took 0.10 ms. Allocated memory is still 306.2 MB. Free memory is still 271.7 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 11:42:28,506 INFO ]: ChcToBoogie took 58.70 ms. Allocated memory is still 306.2 MB. Free memory was 262.6 MB in the beginning and 260.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-18 11:42:28,507 INFO ]: Boogie Preprocessor took 44.89 ms. Allocated memory is still 306.2 MB. Free memory was 260.6 MB in the beginning and 258.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-18 11:42:28,507 INFO ]: RCFGBuilder took 336.27 ms. Allocated memory is still 306.2 MB. Free memory was 258.6 MB in the beginning and 251.6 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 3.6 GB. [2018-06-18 11:42:28,508 INFO ]: TraceAbstraction took 3441.38 ms. Allocated memory was 306.2 MB in the beginning and 325.6 MB in the end (delta: 19.4 MB). Free memory was 251.6 MB in the beginning and 246.5 MB in the end (delta: 5.1 MB). Peak memory consumption was 24.5 MB. Max. memory is 3.6 GB. [2018-06-18 11:42:28,511 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 306.2 MB. Free memory is still 271.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 58.70 ms. Allocated memory is still 306.2 MB. Free memory was 262.6 MB in the beginning and 260.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 44.89 ms. Allocated memory is still 306.2 MB. Free memory was 260.6 MB in the beginning and 258.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 336.27 ms. Allocated memory is still 306.2 MB. Free memory was 258.6 MB in the beginning and 251.6 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 3441.38 ms. Allocated memory was 306.2 MB in the beginning and 325.6 MB in the end (delta: 19.4 MB). Free memory was 251.6 MB in the beginning and 246.5 MB in the end (delta: 5.1 MB). Peak memory consumption was 24.5 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, 15 locations, 1 error locations. SAFE Result, 3.3s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 46 SDtfs, 7 SDslu, 125 SDs, 0 SdLazy, 156 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred 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, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 61 NumberOfCodeBlocks, 61 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 56 ConstructedInterpolants, 0 QuantifiedInterpolants, 5588 SizeOfPredicates, 16 NumberOfNonLiveVariables, 110 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 4/12 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/heap__clearstr.array.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-18_11-42-28-524.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/heap__clearstr.array.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-18_11-42-28-524.csv Received shutdown request...