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/ctigar/seq-z3.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 05:56:01,091 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 05:56:01,096 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 05:56:01,110 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 05:56:01,111 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 05:56:01,112 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 05:56:01,113 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 05:56:01,117 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 05:56:01,120 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 05:56:01,121 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 05:56:01,122 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 05:56:01,123 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 05:56:01,124 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 05:56:01,127 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 05:56:01,128 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 05:56:01,129 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 05:56:01,133 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 05:56:01,147 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 05:56:01,148 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 05:56:01,150 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 05:56:01,151 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 05:56:01,154 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 05:56:01,154 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 05:56:01,155 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 05:56:01,162 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 05:56:01,163 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 05:56:01,164 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 05:56:01,164 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 05:56:01,165 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 05:56:01,166 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 05:56:01,166 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 05:56:01,173 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 05:56:01,173 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 05:56:01,174 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 05:56:01,175 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 05:56:01,175 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 05:56:01,199 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 05:56:01,199 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 05:56:01,200 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 05:56:01,200 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 05:56:01,202 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 05:56:01,202 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 05:56:01,202 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 05:56:01,203 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 05:56:01,203 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:56:01,203 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 05:56:01,203 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 05:56:01,203 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 05:56:01,204 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 05:56:01,204 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 05:56:01,204 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 05:56:01,204 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 05:56:01,204 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 05:56:01,207 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 05:56:01,207 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 05:56:01,261 INFO ]: Repository-Root is: /tmp [2018-06-22 05:56:01,280 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 05:56:01,287 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 05:56:01,288 INFO ]: Initializing SmtParser... [2018-06-22 05:56:01,289 INFO ]: SmtParser initialized [2018-06-22 05:56:01,289 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/seq-z3.c.smt2 [2018-06-22 05:56:01,291 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 05:56:01,391 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/seq-z3.c.smt2 unknown [2018-06-22 05:56:01,692 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/seq-z3.c.smt2 [2018-06-22 05:56:01,697 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 05:56:01,703 INFO ]: Walking toolchain with 4 elements. [2018-06-22 05:56:01,703 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 05:56:01,703 INFO ]: Initializing ChcToBoogie... [2018-06-22 05:56:01,704 INFO ]: ChcToBoogie initialized [2018-06-22 05:56:01,707 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:56:01" (1/1) ... [2018-06-22 05:56:01,765 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:56:01 Unit [2018-06-22 05:56:01,765 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 05:56:01,766 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 05:56:01,766 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 05:56:01,766 INFO ]: Boogie Preprocessor initialized [2018-06-22 05:56:01,787 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:56:01" (1/1) ... [2018-06-22 05:56:01,787 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:56:01" (1/1) ... [2018-06-22 05:56:01,796 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:56:01" (1/1) ... [2018-06-22 05:56:01,796 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:56:01" (1/1) ... [2018-06-22 05:56:01,812 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:56:01" (1/1) ... [2018-06-22 05:56:01,814 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:56:01" (1/1) ... [2018-06-22 05:56:01,816 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:56:01" (1/1) ... [2018-06-22 05:56:01,824 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 05:56:01,825 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 05:56:01,825 INFO ]: Initializing RCFGBuilder... [2018-06-22 05:56:01,825 INFO ]: RCFGBuilder initialized [2018-06-22 05:56:01,826 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:56:01" (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 05:56:01,859 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 05:56:01,859 INFO ]: Found specification of procedure gotoProc [2018-06-22 05:56:01,859 INFO ]: Found implementation of procedure gotoProc [2018-06-22 05:56:01,859 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 05:56:01,859 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 05:56:01,859 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 05:56:02,138 INFO ]: Using library mode [2018-06-22 05:56:02,140 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:56:02 BoogieIcfgContainer [2018-06-22 05:56:02,140 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 05:56:02,141 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 05:56:02,141 INFO ]: Initializing TraceAbstraction... [2018-06-22 05:56:02,145 INFO ]: TraceAbstraction initialized [2018-06-22 05:56:02,145 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:56:01" (1/3) ... [2018-06-22 05:56:02,146 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@87f517d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:56:02, skipping insertion in model container [2018-06-22 05:56:02,146 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:56:01" (2/3) ... [2018-06-22 05:56:02,146 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@87f517d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:56:02, skipping insertion in model container [2018-06-22 05:56:02,146 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:56:02" (3/3) ... [2018-06-22 05:56:02,148 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 05:56:02,160 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 05:56:02,170 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 05:56:02,232 INFO ]: Using default assertion order modulation [2018-06-22 05:56:02,235 INFO ]: Interprodecural is true [2018-06-22 05:56:02,235 INFO ]: Hoare is false [2018-06-22 05:56:02,235 INFO ]: Compute interpolants for FPandBP [2018-06-22 05:56:02,235 INFO ]: Backedges is TWOTRACK [2018-06-22 05:56:02,235 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 05:56:02,235 INFO ]: Difference is false [2018-06-22 05:56:02,235 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 05:56:02,235 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 05:56:02,258 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 05:56:02,272 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 05:56:02,272 INFO ]: Found error trace [2018-06-22 05:56:02,275 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:56:02,276 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:56:02,282 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-22 05:56:02,284 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:56:02,285 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:56:02,337 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:56:02,337 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:56:02,337 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:56:02,390 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:56:02,455 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:56:02,459 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 05:56:02,459 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 05:56:02,462 INFO ]: Interpolant automaton has 3 states [2018-06-22 05:56:02,474 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 05:56:02,474 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:56:02,476 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 05:56:02,543 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:56:02,543 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 05:56:02,544 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 05:56:02,545 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 05:56:02,545 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:56:02,554 INFO ]: With dead ends: 9 [2018-06-22 05:56:02,554 INFO ]: Without dead ends: 9 [2018-06-22 05:56:02,556 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 05:56:02,574 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 05:56:02,591 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 05:56:02,592 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 05:56:02,592 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 05:56:02,594 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 05:56:02,594 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:56:02,594 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 05:56:02,594 INFO ]: Interpolant automaton has 3 states. [2018-06-22 05:56:02,594 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 05:56:02,594 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 05:56:02,594 INFO ]: Found error trace [2018-06-22 05:56:02,594 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:56:02,594 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:56:02,595 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-22 05:56:02,595 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:56:02,595 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:56:02,595 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:56:02,595 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:56:02,596 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:56:02,630 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:56:02,829 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:56:02,830 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:56:02,830 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 05:56:02,837 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:56:02,899 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:56:02,910 INFO ]: Computing forward predicates... [2018-06-22 05:56:03,163 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:56:03,185 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:56:03,185 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 05:56:03,185 INFO ]: Interpolant automaton has 5 states [2018-06-22 05:56:03,186 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 05:56:03,186 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-22 05:56:03,186 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 05:56:03,274 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:56:03,274 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 05:56:03,275 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 05:56:03,275 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 05:56:03,275 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:56:03,275 INFO ]: With dead ends: 11 [2018-06-22 05:56:03,275 INFO ]: Without dead ends: 11 [2018-06-22 05:56:03,276 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:56:03,276 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 05:56:03,278 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 05:56:03,278 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 05:56:03,278 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 05:56:03,278 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-22 05:56:03,278 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:56:03,278 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 05:56:03,278 INFO ]: Interpolant automaton has 5 states. [2018-06-22 05:56:03,278 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 05:56:03,278 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 05:56:03,278 INFO ]: Found error trace [2018-06-22 05:56:03,279 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:56:03,279 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:56:03,279 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 2 times [2018-06-22 05:56:03,279 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:56:03,279 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:56:03,280 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:56:03,280 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:56:03,280 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:56:03,360 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:56:03,838 WARN ]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-22 05:56:03,866 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:56:03,866 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:56:03,866 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 05:56:03,873 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 05:56:03,980 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:56:03,980 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:56:03,984 INFO ]: Computing forward predicates... [2018-06-22 05:56:09,093 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:56:09,113 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:56:09,113 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-22 05:56:09,113 INFO ]: Interpolant automaton has 7 states [2018-06-22 05:56:09,114 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 05:56:09,114 INFO ]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-06-22 05:56:09,114 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-06-22 05:56:09,271 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:56:09,272 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 05:56:09,272 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 05:56:09,272 INFO ]: Start accepts. Automaton has 7 states. Word has length 10 [2018-06-22 05:56:09,272 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:56:09,272 INFO ]: With dead ends: 13 [2018-06-22 05:56:09,272 INFO ]: Without dead ends: 13 [2018-06-22 05:56:09,273 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-06-22 05:56:09,273 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 05:56:09,274 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 05:56:09,274 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 05:56:09,274 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 05:56:09,274 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-06-22 05:56:09,275 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:56:09,275 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 05:56:09,275 INFO ]: Interpolant automaton has 7 states. [2018-06-22 05:56:09,275 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 05:56:09,275 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 05:56:09,275 INFO ]: Found error trace [2018-06-22 05:56:09,275 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:56:09,275 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:56:09,275 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 3 times [2018-06-22 05:56:09,275 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:56:09,275 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:56:09,279 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:56:09,279 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:56:09,279 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:56:09,348 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:56:09,675 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:56:09,675 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:56:09,675 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:56:09,684 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 05:56:09,752 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 05:56:09,752 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:56:09,757 INFO ]: Computing forward predicates... [2018-06-22 05:56:10,015 WARN ]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 05:56:30,618 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:56:30,640 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:56:30,708 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:56:30,782 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:56:30,841 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:56:30,975 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:56:31,172 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:56:31,410 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:56:31,429 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:56:31,586 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:56:31,909 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:56:31,928 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:56:31,969 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:56:32,003 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:56:32,028 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:56:32,041 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:56:32,083 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:56:32,130 WARN ]: expecting exponential blowup for input size 6 Received shutdown request... [2018-06-22 05:57:07,971 INFO ]: Timeout while computing interpolants [2018-06-22 05:57:08,172 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:57:08,172 WARN ]: Verification canceled [2018-06-22 05:57:08,178 WARN ]: Timeout [2018-06-22 05:57:08,179 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 05:57:08 BoogieIcfgContainer [2018-06-22 05:57:08,179 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 05:57:08,180 INFO ]: Toolchain (without parser) took 66482.25 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 261.2 MB in the beginning and 590.8 MB in the end (delta: -329.6 MB). Peak memory consumption was 1.4 GB. Max. memory is 3.6 GB. [2018-06-22 05:57:08,181 INFO ]: SmtParser took 0.09 ms. Allocated memory is still 308.8 MB. Free memory is still 273.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 05:57:08,181 INFO ]: ChcToBoogie took 61.83 ms. Allocated memory is still 308.8 MB. Free memory was 259.2 MB in the beginning and 257.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:57:08,182 INFO ]: Boogie Preprocessor took 58.47 ms. Allocated memory is still 308.8 MB. Free memory is still 257.2 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 05:57:08,182 INFO ]: RCFGBuilder took 315.12 ms. Allocated memory is still 308.8 MB. Free memory was 257.2 MB in the beginning and 245.3 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:57:08,183 INFO ]: TraceAbstraction took 66037.35 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 245.3 MB in the beginning and 590.8 MB in the end (delta: -345.5 MB). Peak memory consumption was 1.4 GB. Max. memory is 3.6 GB. [2018-06-22 05:57:08,186 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.09 ms. Allocated memory is still 308.8 MB. Free memory is still 273.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 61.83 ms. Allocated memory is still 308.8 MB. Free memory was 259.2 MB in the beginning and 257.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 58.47 ms. Allocated memory is still 308.8 MB. Free memory is still 257.2 MB. There was no memory consumed. Max. memory is 3.6 GB. * RCFGBuilder took 315.12 ms. Allocated memory is still 308.8 MB. Free memory was 257.2 MB in the beginning and 245.3 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 66037.35 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 245.3 MB in the beginning and 590.8 MB in the end (delta: -345.5 MB). Peak memory consumption was 1.4 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 13 with TraceHistMax 5, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while XnfDer was eliminating 45192 quantified variables from 16 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 65.9s OverallTime, 4 OverallIterations, 5 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 21 SDtfs, 3 SDslu, 42 SDs, 0 SdLazy, 18 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 6.1s InterpolantComputationTime, 43 NumberOfCodeBlocks, 43 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 38 ConstructedInterpolants, 0 QuantifiedInterpolants, 902 SizeOfPredicates, 10 NumberOfNonLiveVariables, 266 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 0/14 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/seq-z3.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_05-57-08-199.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/seq-z3.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_05-57-08-199.csv Completed graceful shutdown