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/eldarica-misc/LIA/llreve/bug15_safe.c-1.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 01:10:50,736 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 01:10:50,738 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 01:10:50,751 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 01:10:50,752 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 01:10:50,756 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 01:10:50,757 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 01:10:50,760 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 01:10:50,762 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 01:10:50,764 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 01:10:50,767 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 01:10:50,767 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 01:10:50,768 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 01:10:50,769 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 01:10:50,772 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 01:10:50,773 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 01:10:50,775 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 01:10:50,788 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 01:10:50,790 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 01:10:50,791 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 01:10:50,792 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 01:10:50,795 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 01:10:50,795 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 01:10:50,795 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 01:10:50,801 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 01:10:50,802 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 01:10:50,803 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 01:10:50,804 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 01:10:50,807 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 01:10:50,807 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 01:10:50,808 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 01:10:50,808 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 01:10:50,809 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 01:10:50,814 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 01:10:50,814 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 01:10:50,815 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 01:10:50,838 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 01:10:50,839 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 01:10:50,840 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 01:10:50,840 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 01:10:50,841 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 01:10:50,841 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 01:10:50,841 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 01:10:50,842 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 01:10:50,842 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 01:10:50,842 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 01:10:50,842 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 01:10:50,842 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 01:10:50,842 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 01:10:50,846 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 01:10:50,846 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 01:10:50,846 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 01:10:50,847 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 01:10:50,848 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 01:10:50,848 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 01:10:50,902 INFO ]: Repository-Root is: /tmp [2018-06-22 01:10:50,920 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 01:10:50,928 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 01:10:50,929 INFO ]: Initializing SmtParser... [2018-06-22 01:10:50,930 INFO ]: SmtParser initialized [2018-06-22 01:10:50,930 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/eldarica-misc/LIA/llreve/bug15_safe.c-1.smt2 [2018-06-22 01:10:50,932 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 01:10:51,031 INFO ]: Executing SMT file /storage/chc-comp/eldarica-misc/LIA/llreve/bug15_safe.c-1.smt2 unknown [2018-06-22 01:10:51,230 INFO ]: Succesfully executed SMT file /storage/chc-comp/eldarica-misc/LIA/llreve/bug15_safe.c-1.smt2 [2018-06-22 01:10:51,240 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 01:10:51,256 INFO ]: Walking toolchain with 4 elements. [2018-06-22 01:10:51,256 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 01:10:51,256 INFO ]: Initializing ChcToBoogie... [2018-06-22 01:10:51,256 INFO ]: ChcToBoogie initialized [2018-06-22 01:10:51,260 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 01:10:51" (1/1) ... [2018-06-22 01:10:51,323 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:10:51 Unit [2018-06-22 01:10:51,323 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 01:10:51,323 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 01:10:51,323 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 01:10:51,323 INFO ]: Boogie Preprocessor initialized [2018-06-22 01:10:51,346 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:10:51" (1/1) ... [2018-06-22 01:10:51,346 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:10:51" (1/1) ... [2018-06-22 01:10:51,353 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:10:51" (1/1) ... [2018-06-22 01:10:51,353 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:10:51" (1/1) ... [2018-06-22 01:10:51,357 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:10:51" (1/1) ... [2018-06-22 01:10:51,359 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:10:51" (1/1) ... [2018-06-22 01:10:51,360 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:10:51" (1/1) ... [2018-06-22 01:10:51,363 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 01:10:51,364 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 01:10:51,364 INFO ]: Initializing RCFGBuilder... [2018-06-22 01:10:51,364 INFO ]: RCFGBuilder initialized [2018-06-22 01:10:51,365 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:10:51" (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 01:10:51,381 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 01:10:51,381 INFO ]: Found specification of procedure gotoProc [2018-06-22 01:10:51,381 INFO ]: Found implementation of procedure gotoProc [2018-06-22 01:10:51,381 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 01:10:51,382 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 01:10:51,382 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 01:10:51,687 INFO ]: Using library mode [2018-06-22 01:10:51,687 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 01:10:51 BoogieIcfgContainer [2018-06-22 01:10:51,688 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 01:10:51,689 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 01:10:51,689 INFO ]: Initializing TraceAbstraction... [2018-06-22 01:10:51,693 INFO ]: TraceAbstraction initialized [2018-06-22 01:10:51,693 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 01:10:51" (1/3) ... [2018-06-22 01:10:51,694 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48d9ad33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 01:10:51, skipping insertion in model container [2018-06-22 01:10:51,694 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:10:51" (2/3) ... [2018-06-22 01:10:51,695 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48d9ad33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 01:10:51, skipping insertion in model container [2018-06-22 01:10:51,695 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 01:10:51" (3/3) ... [2018-06-22 01:10:51,697 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 01:10:51,710 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 01:10:51,723 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 01:10:51,772 INFO ]: Using default assertion order modulation [2018-06-22 01:10:51,772 INFO ]: Interprodecural is true [2018-06-22 01:10:51,772 INFO ]: Hoare is false [2018-06-22 01:10:51,772 INFO ]: Compute interpolants for FPandBP [2018-06-22 01:10:51,772 INFO ]: Backedges is TWOTRACK [2018-06-22 01:10:51,772 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 01:10:51,772 INFO ]: Difference is false [2018-06-22 01:10:51,773 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 01:10:51,773 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 01:10:51,789 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 01:10:51,800 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 01:10:51,800 INFO ]: Found error trace [2018-06-22 01:10:51,801 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:10:51,802 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:10:51,806 INFO ]: Analyzing trace with hash 823983054, now seen corresponding path program 1 times [2018-06-22 01:10:51,808 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:10:51,808 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:10:51,848 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:10:51,848 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:10:51,848 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:10:51,893 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:10:51,990 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:10:51,993 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 01:10:51,993 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 01:10:51,995 INFO ]: Interpolant automaton has 3 states [2018-06-22 01:10:52,014 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 01:10:52,014 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 01:10:52,018 INFO ]: Start difference. First operand 13 states. Second operand 3 states. [2018-06-22 01:10:52,103 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:10:52,103 INFO ]: Finished difference Result 12 states and 13 transitions. [2018-06-22 01:10:52,104 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 01:10:52,106 INFO ]: Start accepts. Automaton has 3 states. Word has length 10 [2018-06-22 01:10:52,106 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:10:52,114 INFO ]: With dead ends: 12 [2018-06-22 01:10:52,114 INFO ]: Without dead ends: 12 [2018-06-22 01:10:52,116 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 01:10:52,130 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 01:10:52,157 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 01:10:52,159 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 01:10:52,160 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2018-06-22 01:10:52,161 INFO ]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2018-06-22 01:10:52,161 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:10:52,161 INFO ]: Abstraction has 12 states and 13 transitions. [2018-06-22 01:10:52,161 INFO ]: Interpolant automaton has 3 states. [2018-06-22 01:10:52,161 INFO ]: Start isEmpty. Operand 12 states and 13 transitions. [2018-06-22 01:10:52,162 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 01:10:52,162 INFO ]: Found error trace [2018-06-22 01:10:52,162 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:10:52,162 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:10:52,162 INFO ]: Analyzing trace with hash 2119973472, now seen corresponding path program 1 times [2018-06-22 01:10:52,162 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:10:52,162 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:10:52,164 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:10:52,164 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:10:52,164 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:10:52,184 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:10:52,221 INFO ]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 01:10:52,221 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 01:10:52,221 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 01:10:52,223 INFO ]: Interpolant automaton has 3 states [2018-06-22 01:10:52,223 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 01:10:52,223 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 01:10:52,223 INFO ]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2018-06-22 01:10:52,244 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:10:52,244 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 01:10:52,245 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 01:10:52,245 INFO ]: Start accepts. Automaton has 3 states. Word has length 11 [2018-06-22 01:10:52,245 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:10:52,245 INFO ]: With dead ends: 13 [2018-06-22 01:10:52,245 INFO ]: Without dead ends: 13 [2018-06-22 01:10:52,246 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 01:10:52,246 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 01:10:52,248 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 01:10:52,248 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 01:10:52,248 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 01:10:52,248 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2018-06-22 01:10:52,248 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:10:52,249 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 01:10:52,249 INFO ]: Interpolant automaton has 3 states. [2018-06-22 01:10:52,249 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 01:10:52,249 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 01:10:52,249 INFO ]: Found error trace [2018-06-22 01:10:52,249 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:10:52,249 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:10:52,249 INFO ]: Analyzing trace with hash 1235527436, now seen corresponding path program 1 times [2018-06-22 01:10:52,249 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:10:52,249 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:10:52,250 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:10:52,250 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:10:52,250 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:10:52,265 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:10:52,347 INFO ]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 01:10:52,347 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:10:52,347 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 01:10:52,363 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:10:52,411 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:10:52,421 INFO ]: Computing forward predicates... [2018-06-22 01:10:52,451 INFO ]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 01:10:52,491 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:10:52,491 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-06-22 01:10:52,492 INFO ]: Interpolant automaton has 4 states [2018-06-22 01:10:52,492 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 01:10:52,492 INFO ]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-22 01:10:52,492 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 4 states. [2018-06-22 01:10:52,596 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:10:52,596 INFO ]: Finished difference Result 14 states and 15 transitions. [2018-06-22 01:10:52,598 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 01:10:52,598 INFO ]: Start accepts. Automaton has 4 states. Word has length 12 [2018-06-22 01:10:52,598 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:10:52,598 INFO ]: With dead ends: 14 [2018-06-22 01:10:52,598 INFO ]: Without dead ends: 14 [2018-06-22 01:10:52,599 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-22 01:10:52,599 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-22 01:10:52,601 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-06-22 01:10:52,601 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-22 01:10:52,601 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-06-22 01:10:52,601 INFO ]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2018-06-22 01:10:52,601 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:10:52,601 INFO ]: Abstraction has 14 states and 15 transitions. [2018-06-22 01:10:52,601 INFO ]: Interpolant automaton has 4 states. [2018-06-22 01:10:52,601 INFO ]: Start isEmpty. Operand 14 states and 15 transitions. [2018-06-22 01:10:52,603 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 01:10:52,603 INFO ]: Found error trace [2018-06-22 01:10:52,603 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:10:52,603 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:10:52,604 INFO ]: Analyzing trace with hash 1141803294, now seen corresponding path program 2 times [2018-06-22 01:10:52,604 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:10:52,604 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:10:52,604 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:10:52,604 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:10:52,604 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:10:52,636 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:10:52,795 INFO ]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 01:10:52,795 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:10:52,795 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 01:10:52,802 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 01:10:52,875 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 01:10:52,875 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:10:52,880 INFO ]: Computing forward predicates... [2018-06-22 01:10:52,890 INFO ]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 01:10:52,926 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:10:52,926 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-06-22 01:10:52,926 INFO ]: Interpolant automaton has 4 states [2018-06-22 01:10:52,926 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 01:10:52,926 INFO ]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-22 01:10:52,927 INFO ]: Start difference. First operand 14 states and 15 transitions. Second operand 4 states. [2018-06-22 01:10:53,021 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:10:53,021 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 01:10:53,022 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 01:10:53,022 INFO ]: Start accepts. Automaton has 4 states. Word has length 13 [2018-06-22 01:10:53,022 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:10:53,023 INFO ]: With dead ends: 15 [2018-06-22 01:10:53,023 INFO ]: Without dead ends: 15 [2018-06-22 01:10:53,023 INFO ]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-22 01:10:53,023 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 01:10:53,025 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 01:10:53,025 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 01:10:53,025 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 01:10:53,025 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 01:10:53,025 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:10:53,025 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 01:10:53,025 INFO ]: Interpolant automaton has 4 states. [2018-06-22 01:10:53,025 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 01:10:53,028 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-22 01:10:53,028 INFO ]: Found error trace [2018-06-22 01:10:53,028 INFO ]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:10:53,028 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:10:53,029 INFO ]: Analyzing trace with hash 977022990, now seen corresponding path program 3 times [2018-06-22 01:10:53,029 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:10:53,029 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:10:53,030 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:10:53,030 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:10:53,030 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:10:53,077 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:10:53,388 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:10:53,388 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:10:53,388 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 01:10:53,396 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 01:10:53,454 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-06-22 01:10:53,454 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:10:53,457 INFO ]: Computing forward predicates... [2018-06-22 01:10:53,654 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:10:53,682 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:10:53,682 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-06-22 01:10:53,682 INFO ]: Interpolant automaton has 9 states [2018-06-22 01:10:53,682 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 01:10:53,683 INFO ]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-06-22 01:10:53,683 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 9 states. [2018-06-22 01:10:54,142 WARN ]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2018-06-22 01:10:54,600 WARN ]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-06-22 01:10:54,957 WARN ]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-06-22 01:10:55,088 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:10:55,088 INFO ]: Finished difference Result 20 states and 22 transitions. [2018-06-22 01:10:55,090 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 01:10:55,090 INFO ]: Start accepts. Automaton has 9 states. Word has length 14 [2018-06-22 01:10:55,090 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:10:55,091 INFO ]: With dead ends: 20 [2018-06-22 01:10:55,091 INFO ]: Without dead ends: 16 [2018-06-22 01:10:55,092 INFO ]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2018-06-22 01:10:55,092 INFO ]: Start minimizeSevpa. Operand 16 states. [2018-06-22 01:10:55,094 INFO ]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-06-22 01:10:55,094 INFO ]: Start removeUnreachable. Operand 16 states. [2018-06-22 01:10:55,095 INFO ]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-06-22 01:10:55,095 INFO ]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-06-22 01:10:55,095 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:10:55,095 INFO ]: Abstraction has 16 states and 16 transitions. [2018-06-22 01:10:55,095 INFO ]: Interpolant automaton has 9 states. [2018-06-22 01:10:55,095 INFO ]: Start isEmpty. Operand 16 states and 16 transitions. [2018-06-22 01:10:55,095 INFO ]: Finished isEmpty. Found accepting run of length 16 [2018-06-22 01:10:55,095 INFO ]: Found error trace [2018-06-22 01:10:55,095 INFO ]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:10:55,096 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:10:55,096 INFO ]: Analyzing trace with hash 1102435744, now seen corresponding path program 4 times [2018-06-22 01:10:55,096 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:10:55,096 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:10:55,097 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:10:55,097 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:10:55,097 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:10:55,112 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:10:55,172 INFO ]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 01:10:55,172 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 01:10:55,172 INFO ]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-06-22 01:10:55,172 INFO ]: Interpolant automaton has 5 states [2018-06-22 01:10:55,172 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 01:10:55,172 INFO ]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-06-22 01:10:55,173 INFO ]: Start difference. First operand 16 states and 16 transitions. Second operand 5 states. [2018-06-22 01:10:55,202 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:10:55,202 INFO ]: Finished difference Result 8 states and 8 transitions. [2018-06-22 01:10:55,203 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 01:10:55,203 INFO ]: Start accepts. Automaton has 5 states. Word has length 15 [2018-06-22 01:10:55,203 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:10:55,203 INFO ]: With dead ends: 8 [2018-06-22 01:10:55,203 INFO ]: Without dead ends: 0 [2018-06-22 01:10:55,203 INFO ]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-06-22 01:10:55,203 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 01:10:55,203 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 01:10:55,203 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 01:10:55,203 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 01:10:55,203 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2018-06-22 01:10:55,204 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:10:55,204 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 01:10:55,204 INFO ]: Interpolant automaton has 5 states. [2018-06-22 01:10:55,204 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 01:10:55,204 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 01:10:55,208 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 01:10:55 BoogieIcfgContainer [2018-06-22 01:10:55,208 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 01:10:55,209 INFO ]: Toolchain (without parser) took 3968.40 ms. Allocated memory is still 308.3 MB. Free memory was 264.7 MB in the beginning and 241.8 MB in the end (delta: 22.9 MB). Peak memory consumption was 22.9 MB. Max. memory is 3.6 GB. [2018-06-22 01:10:55,210 INFO ]: SmtParser took 0.09 ms. Allocated memory is still 308.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 01:10:55,210 INFO ]: ChcToBoogie took 66.80 ms. Allocated memory is still 308.3 MB. Free memory was 264.7 MB in the beginning and 262.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 01:10:55,211 INFO ]: Boogie Preprocessor took 39.86 ms. Allocated memory is still 308.3 MB. Free memory was 262.7 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. [2018-06-22 01:10:55,211 INFO ]: RCFGBuilder took 323.93 ms. Allocated memory is still 308.3 MB. Free memory was 260.6 MB in the beginning and 252.6 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. [2018-06-22 01:10:55,212 INFO ]: TraceAbstraction took 3519.25 ms. Allocated memory is still 308.3 MB. Free memory was 252.6 MB in the beginning and 241.8 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 3.6 GB. [2018-06-22 01:10:55,215 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 308.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 66.80 ms. Allocated memory is still 308.3 MB. Free memory was 264.7 MB in the beginning and 262.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 39.86 ms. Allocated memory is still 308.3 MB. Free memory was 262.7 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. * RCFGBuilder took 323.93 ms. Allocated memory is still 308.3 MB. Free memory was 260.6 MB in the beginning and 252.6 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 3519.25 ms. Allocated memory is still 308.3 MB. Free memory was 252.6 MB in the beginning and 241.8 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 13 locations, 1 error locations. SAFE Result, 3.4s OverallTime, 6 OverallIterations, 3 TraceHistogramMax, 1.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 56 SDtfs, 20 SDslu, 95 SDs, 0 SdLazy, 60 SolverSat, 30 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=5, 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, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 114 NumberOfCodeBlocks, 114 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 105 ConstructedInterpolants, 0 QuantifiedInterpolants, 2619 SizeOfPredicates, 7 NumberOfNonLiveVariables, 328 ConjunctsInSsa, 49 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 18/34 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/bug15_safe.c-1.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_01-10-55-231.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/bug15_safe.c-1.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_01-10-55-231.csv Received shutdown request...