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/apache-escape-absolute.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 05:07:41,842 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 05:07:41,845 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 05:07:41,857 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 05:07:41,857 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 05:07:41,858 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 05:07:41,862 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 05:07:41,863 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 05:07:41,865 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 05:07:41,866 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 05:07:41,867 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 05:07:41,867 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 05:07:41,868 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 05:07:41,869 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 05:07:41,870 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 05:07:41,871 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 05:07:41,873 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 05:07:41,883 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 05:07:41,884 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 05:07:41,885 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 05:07:41,887 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 05:07:41,889 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 05:07:41,890 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 05:07:41,890 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 05:07:41,899 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 05:07:41,900 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 05:07:41,901 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 05:07:41,902 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 05:07:41,903 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 05:07:41,903 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 05:07:41,904 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 05:07:41,904 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 05:07:41,904 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 05:07:41,905 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 05:07:41,912 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 05:07:41,912 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 05:07:41,928 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 05:07:41,928 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 05:07:41,929 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 05:07:41,929 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 05:07:41,930 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 05:07:41,930 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 05:07:41,930 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 05:07:41,930 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 05:07:41,931 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:07:41,931 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 05:07:41,931 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 05:07:41,931 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 05:07:41,932 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 05:07:41,932 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 05:07:41,932 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 05:07:41,932 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 05:07:41,932 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 05:07:41,934 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 05:07:41,934 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 05:07:41,979 INFO ]: Repository-Root is: /tmp [2018-06-22 05:07:41,996 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 05:07:42,001 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 05:07:42,003 INFO ]: Initializing SmtParser... [2018-06-22 05:07:42,003 INFO ]: SmtParser initialized [2018-06-22 05:07:42,004 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/apache-escape-absolute.c.smt2 [2018-06-22 05:07:42,006 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 05:07:42,093 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/apache-escape-absolute.c.smt2 unknown [2018-06-22 05:07:42,632 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/apache-escape-absolute.c.smt2 [2018-06-22 05:07:42,637 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 05:07:42,644 INFO ]: Walking toolchain with 4 elements. [2018-06-22 05:07:42,645 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 05:07:42,645 INFO ]: Initializing ChcToBoogie... [2018-06-22 05:07:42,645 INFO ]: ChcToBoogie initialized [2018-06-22 05:07:42,648 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:07:42" (1/1) ... [2018-06-22 05:07:42,719 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:07:42 Unit [2018-06-22 05:07:42,719 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 05:07:42,720 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 05:07:42,720 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 05:07:42,720 INFO ]: Boogie Preprocessor initialized [2018-06-22 05:07:42,740 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:07:42" (1/1) ... [2018-06-22 05:07:42,741 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:07:42" (1/1) ... [2018-06-22 05:07:42,751 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:07:42" (1/1) ... [2018-06-22 05:07:42,751 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:07:42" (1/1) ... [2018-06-22 05:07:42,763 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:07:42" (1/1) ... [2018-06-22 05:07:42,765 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:07:42" (1/1) ... [2018-06-22 05:07:42,769 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:07:42" (1/1) ... [2018-06-22 05:07:42,773 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 05:07:42,773 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 05:07:42,773 INFO ]: Initializing RCFGBuilder... [2018-06-22 05:07:42,773 INFO ]: RCFGBuilder initialized [2018-06-22 05:07:42,774 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:07:42" (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) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:07:42,816 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 05:07:42,816 INFO ]: Found specification of procedure gotoProc [2018-06-22 05:07:42,816 INFO ]: Found implementation of procedure gotoProc [2018-06-22 05:07:42,816 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 05:07:42,816 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 05:07:42,816 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 05:07:43,248 INFO ]: Using library mode [2018-06-22 05:07:43,249 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:07:43 BoogieIcfgContainer [2018-06-22 05:07:43,249 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 05:07:43,251 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 05:07:43,251 INFO ]: Initializing TraceAbstraction... [2018-06-22 05:07:43,254 INFO ]: TraceAbstraction initialized [2018-06-22 05:07:43,254 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:07:42" (1/3) ... [2018-06-22 05:07:43,255 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7be8b798 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:07:43, skipping insertion in model container [2018-06-22 05:07:43,255 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:07:42" (2/3) ... [2018-06-22 05:07:43,256 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7be8b798 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:07:43, skipping insertion in model container [2018-06-22 05:07:43,256 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:07:43" (3/3) ... [2018-06-22 05:07:43,260 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 05:07:43,270 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 05:07:43,279 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 05:07:43,336 INFO ]: Using default assertion order modulation [2018-06-22 05:07:43,336 INFO ]: Interprodecural is true [2018-06-22 05:07:43,336 INFO ]: Hoare is false [2018-06-22 05:07:43,336 INFO ]: Compute interpolants for FPandBP [2018-06-22 05:07:43,336 INFO ]: Backedges is TWOTRACK [2018-06-22 05:07:43,336 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 05:07:43,336 INFO ]: Difference is false [2018-06-22 05:07:43,336 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 05:07:43,336 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 05:07:43,354 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 05:07:43,367 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 05:07:43,367 INFO ]: Found error trace [2018-06-22 05:07:43,368 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:07:43,368 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:07:43,374 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-22 05:07:43,376 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:07:43,376 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:07:43,422 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:07:43,422 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:07:43,422 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:07:43,482 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:07:43,590 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:07:43,592 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 05:07:43,592 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 05:07:43,593 INFO ]: Interpolant automaton has 3 states [2018-06-22 05:07:43,603 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 05:07:43,603 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:07:43,605 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 05:07:43,687 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:07:43,687 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 05:07:43,687 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 05:07:43,688 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 05:07:43,688 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:07:43,696 INFO ]: With dead ends: 9 [2018-06-22 05:07:43,696 INFO ]: Without dead ends: 9 [2018-06-22 05:07:43,698 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 05:07:43,718 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 05:07:43,738 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 05:07:43,740 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 05:07:43,740 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 05:07:43,742 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 05:07:43,742 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:07:43,742 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 05:07:43,742 INFO ]: Interpolant automaton has 3 states. [2018-06-22 05:07:43,742 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 05:07:43,742 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 05:07:43,742 INFO ]: Found error trace [2018-06-22 05:07:43,742 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:07:43,743 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:07:43,743 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-22 05:07:43,743 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:07:43,743 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:07:43,744 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:07:43,744 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:07:43,744 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:07:43,849 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:07:44,266 WARN ]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 05:07:44,267 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:07:44,267 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:07:44,267 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 05:07:44,276 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:07:44,353 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:07:44,364 INFO ]: Computing forward predicates... [2018-06-22 05:07:45,621 WARN ]: Spent 171.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2018-06-22 05:07:48,184 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:07:48,213 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:07:48,213 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 05:07:48,213 INFO ]: Interpolant automaton has 5 states [2018-06-22 05:07:48,214 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 05:07:48,214 INFO ]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-22 05:07:48,214 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 05:07:48,234 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:07:48,234 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 05:07:48,235 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 05:07:48,235 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 05:07:48,235 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:07:48,236 INFO ]: With dead ends: 10 [2018-06-22 05:07:48,236 INFO ]: Without dead ends: 10 [2018-06-22 05:07:48,236 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-22 05:07:48,237 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 05:07:48,237 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 05:07:48,238 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 05:07:48,238 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 05:07:48,238 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 05:07:48,238 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:07:48,238 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 05:07:48,238 INFO ]: Interpolant automaton has 5 states. [2018-06-22 05:07:48,238 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 05:07:48,238 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 05:07:48,238 INFO ]: Found error trace [2018-06-22 05:07:48,238 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:07:48,239 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:07:48,239 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-22 05:07:48,239 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:07:48,239 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:07:48,241 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:07:48,241 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:07:48,241 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:07:48,330 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:07:48,861 WARN ]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-22 05:07:49,462 WARN ]: Spent 549.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-06-22 05:07:49,510 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:07:49,510 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:07:49,510 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 05:07:49,517 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 05:07:49,604 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:07:49,605 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:07:49,608 INFO ]: Computing forward predicates... [2018-06-22 05:07:50,267 WARN ]: Spent 215.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 21 [2018-06-22 05:07:56,263 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:07:56,286 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:07:56,286 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-22 05:07:56,286 INFO ]: Interpolant automaton has 6 states [2018-06-22 05:07:56,286 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 05:07:56,286 INFO ]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:07:56,286 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-22 05:07:56,355 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:07:56,355 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 05:07:56,356 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 05:07:56,356 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-22 05:07:56,356 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:07:56,356 INFO ]: With dead ends: 11 [2018-06-22 05:07:56,356 INFO ]: Without dead ends: 11 [2018-06-22 05:07:56,357 INFO ]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-06-22 05:07:56,357 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 05:07:56,358 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 05:07:56,358 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 05:07:56,358 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 05:07:56,358 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-22 05:07:56,358 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:07:56,358 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 05:07:56,358 INFO ]: Interpolant automaton has 6 states. [2018-06-22 05:07:56,358 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 05:07:56,358 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 05:07:56,358 INFO ]: Found error trace [2018-06-22 05:07:56,358 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:07:56,359 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:07:56,359 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 3 times [2018-06-22 05:07:56,359 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:07:56,359 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:07:56,360 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:07:56,360 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:07:56,360 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:07:56,459 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:07:56,772 WARN ]: Spent 134.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2018-06-22 05:07:57,111 WARN ]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 05:07:57,112 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:07:57,112 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:07:57,112 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 05:07:57,118 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 05:07:57,238 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 05:07:57,238 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:07:57,243 INFO ]: Computing forward predicates... [2018-06-22 05:07:58,403 WARN ]: Spent 656.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2018-06-22 05:08:04,225 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:08:04,228 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:08:04,243 WARN ]: expecting exponential blowup for input size 6 Received shutdown request... [2018-06-22 05:08:46,807 INFO ]: Timeout while computing interpolants [2018-06-22 05:08:47,008 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:08:47,008 WARN ]: Verification canceled [2018-06-22 05:08:47,011 WARN ]: Timeout [2018-06-22 05:08:47,011 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 05:08:47 BoogieIcfgContainer [2018-06-22 05:08:47,012 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 05:08:47,012 INFO ]: Toolchain (without parser) took 64374.58 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 244.3 MB in the beginning and 1.2 GB in the end (delta: -925.6 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 05:08:47,013 INFO ]: SmtParser took 0.12 ms. Allocated memory is still 308.8 MB. Free memory is still 274.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 05:08:47,014 INFO ]: ChcToBoogie took 74.29 ms. Allocated memory is still 308.8 MB. Free memory was 244.3 MB in the beginning and 241.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:08:47,014 INFO ]: Boogie Preprocessor took 53.21 ms. Allocated memory is still 308.8 MB. Free memory was 241.3 MB in the beginning and 239.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:08:47,015 INFO ]: RCFGBuilder took 475.83 ms. Allocated memory is still 308.8 MB. Free memory was 239.3 MB in the beginning and 216.6 MB in the end (delta: 22.7 MB). Peak memory consumption was 22.7 MB. Max. memory is 3.6 GB. [2018-06-22 05:08:47,015 INFO ]: TraceAbstraction took 63760.58 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 216.6 MB in the beginning and 1.2 GB in the end (delta: -953.3 MB). Peak memory consumption was 1.2 GB. Max. memory is 3.6 GB. [2018-06-22 05:08:47,020 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.12 ms. Allocated memory is still 308.8 MB. Free memory is still 274.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 74.29 ms. Allocated memory is still 308.8 MB. Free memory was 244.3 MB in the beginning and 241.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 53.21 ms. Allocated memory is still 308.8 MB. Free memory was 241.3 MB in the beginning and 239.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 475.83 ms. Allocated memory is still 308.8 MB. Free memory was 239.3 MB in the beginning and 216.6 MB in the end (delta: 22.7 MB). Peak memory consumption was 22.7 MB. Max. memory is 3.6 GB. * TraceAbstraction took 63760.58 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 216.6 MB in the beginning and 1.2 GB in the end (delta: -953.3 MB). Peak memory consumption was 1.2 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 11 with TraceHistMax 3, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 24 quantified variables from 10 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 63.6s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 21 SDtfs, 2 SDslu, 28 SDs, 0 SdLazy, 13 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred 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, 0.3s SatisfiabilityAnalysisTime, 12.1s InterpolantComputationTime, 41 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 1716 SizeOfPredicates, 14 NumberOfNonLiveVariables, 508 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 0/8 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/apache-escape-absolute.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_05-08-47-032.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/apache-escape-absolute.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_05-08-47-032.csv Completed graceful shutdown