/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i5_o5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 17:22:01,928 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 17:22:01,930 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 17:22:01,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 17:22:01,948 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 17:22:01,950 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 17:22:01,952 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 17:22:01,961 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 17:22:01,965 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 17:22:01,968 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 17:22:01,970 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 17:22:01,972 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 17:22:01,972 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 17:22:01,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 17:22:01,976 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 17:22:01,977 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 17:22:01,978 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 17:22:01,979 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 17:22:01,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 17:22:01,983 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 17:22:01,989 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 17:22:01,992 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 17:22:01,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 17:22:01,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 17:22:01,997 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 17:22:02,007 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 17:22:02,008 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 17:22:02,009 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 17:22:02,010 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 17:22:02,038 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 17:22:02,038 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 17:22:02,040 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 17:22:02,040 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 17:22:02,040 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 17:22:02,040 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 17:22:02,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 17:22:02,041 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 17:22:02,041 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 17:22:02,041 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 17:22:02,041 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 17:22:02,041 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 17:22:02,042 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 17:22:02,042 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 17:22:02,042 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 17:22:02,042 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 17:22:02,042 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 17:22:02,042 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 17:22:02,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 17:22:02,043 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 17:22:02,043 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 17:22:02,043 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 17:22:02,043 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-07-17 17:22:02,311 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 17:22:02,324 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 17:22:02,328 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 17:22:02,329 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 17:22:02,329 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 17:22:02,330 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i5_o5-1.c [2020-07-17 17:22:02,400 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/faa2c1c0c/4455b20bda6e44eda4f1034e60c4db46/FLAG051f9e406 [2020-07-17 17:22:02,877 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 17:22:02,877 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i5_o5-1.c [2020-07-17 17:22:02,883 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/faa2c1c0c/4455b20bda6e44eda4f1034e60c4db46/FLAG051f9e406 [2020-07-17 17:22:03,282 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/faa2c1c0c/4455b20bda6e44eda4f1034e60c4db46 [2020-07-17 17:22:03,292 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 17:22:03,295 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 17:22:03,296 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 17:22:03,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 17:22:03,300 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 17:22:03,301 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:22:03" (1/1) ... [2020-07-17 17:22:03,303 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@517fdeba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:22:03, skipping insertion in model container [2020-07-17 17:22:03,304 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:22:03" (1/1) ... [2020-07-17 17:22:03,311 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 17:22:03,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 17:22:03,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:22:03,477 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 17:22:03,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:22:03,506 INFO L208 MainTranslator]: Completed translation [2020-07-17 17:22:03,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:22:03 WrapperNode [2020-07-17 17:22:03,506 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 17:22:03,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 17:22:03,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 17:22:03,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 17:22:03,520 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:22:03" (1/1) ... [2020-07-17 17:22:03,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:22:03" (1/1) ... [2020-07-17 17:22:03,526 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:22:03" (1/1) ... [2020-07-17 17:22:03,526 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:22:03" (1/1) ... [2020-07-17 17:22:03,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:22:03" (1/1) ... [2020-07-17 17:22:03,530 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:22:03" (1/1) ... [2020-07-17 17:22:03,531 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:22:03" (1/1) ... [2020-07-17 17:22:03,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 17:22:03,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 17:22:03,533 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 17:22:03,533 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 17:22:03,534 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:22:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 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 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 17:22:03,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 17:22:03,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 17:22:03,677 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-17 17:22:03,677 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 17:22:03,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 17:22:03,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 17:22:03,677 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-17 17:22:03,677 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 17:22:03,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 17:22:03,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 17:22:03,830 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 17:22:03,831 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 17:22:03,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:22:03 BoogieIcfgContainer [2020-07-17 17:22:03,835 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 17:22:03,836 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 17:22:03,836 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 17:22:03,840 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 17:22:03,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 05:22:03" (1/3) ... [2020-07-17 17:22:03,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eca8d4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:22:03, skipping insertion in model container [2020-07-17 17:22:03,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:22:03" (2/3) ... [2020-07-17 17:22:03,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eca8d4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:22:03, skipping insertion in model container [2020-07-17 17:22:03,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:22:03" (3/3) ... [2020-07-17 17:22:03,844 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i5_o5-1.c [2020-07-17 17:22:03,855 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 17:22:03,863 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 17:22:03,883 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 17:22:03,909 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 17:22:03,909 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 17:22:03,909 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 17:22:03,909 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 17:22:03,909 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 17:22:03,910 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 17:22:03,910 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 17:22:03,910 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 17:22:03,928 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-07-17 17:22:03,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-17 17:22:03,941 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:03,942 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:03,942 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:03,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:03,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1037734449, now seen corresponding path program 1 times [2020-07-17 17:22:03,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:03,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982550188] [2020-07-17 17:22:03,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:04,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:22:04,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982550188] [2020-07-17 17:22:04,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:22:04,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 17:22:04,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477346377] [2020-07-17 17:22:04,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 17:22:04,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:04,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 17:22:04,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 17:22:04,175 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2020-07-17 17:22:04,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:04,268 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-07-17 17:22:04,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 17:22:04,270 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-17 17:22:04,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:04,280 INFO L225 Difference]: With dead ends: 37 [2020-07-17 17:22:04,280 INFO L226 Difference]: Without dead ends: 23 [2020-07-17 17:22:04,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 17:22:04,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-17 17:22:04,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-17 17:22:04,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-17 17:22:04,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-07-17 17:22:04,328 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 16 [2020-07-17 17:22:04,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:04,329 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-07-17 17:22:04,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 17:22:04,329 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-07-17 17:22:04,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-17 17:22:04,331 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:04,331 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:04,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 17:22:04,332 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:04,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:04,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1478812441, now seen corresponding path program 1 times [2020-07-17 17:22:04,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:04,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516380809] [2020-07-17 17:22:04,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:04,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-17 17:22:04,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516380809] [2020-07-17 17:22:04,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:04,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-17 17:22:04,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633558939] [2020-07-17 17:22:04,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 17:22:04,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:04,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 17:22:04,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-17 17:22:04,486 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 6 states. [2020-07-17 17:22:04,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:04,549 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-17 17:22:04,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 17:22:04,550 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-07-17 17:22:04,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:04,551 INFO L225 Difference]: With dead ends: 34 [2020-07-17 17:22:04,551 INFO L226 Difference]: Without dead ends: 28 [2020-07-17 17:22:04,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-07-17 17:22:04,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-17 17:22:04,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-17 17:22:04,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-17 17:22:04,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-07-17 17:22:04,564 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2020-07-17 17:22:04,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:04,565 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-07-17 17:22:04,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 17:22:04,565 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-07-17 17:22:04,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-17 17:22:04,567 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:04,567 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:04,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 17:22:04,568 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:04,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:04,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1463730447, now seen corresponding path program 2 times [2020-07-17 17:22:04,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:04,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523288207] [2020-07-17 17:22:04,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:04,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,756 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-17 17:22:04,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523288207] [2020-07-17 17:22:04,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:04,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-17 17:22:04,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197594474] [2020-07-17 17:22:04,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 17:22:04,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:04,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 17:22:04,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-17 17:22:04,759 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 7 states. [2020-07-17 17:22:04,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:04,827 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2020-07-17 17:22:04,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 17:22:04,828 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-07-17 17:22:04,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:04,830 INFO L225 Difference]: With dead ends: 39 [2020-07-17 17:22:04,830 INFO L226 Difference]: Without dead ends: 33 [2020-07-17 17:22:04,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-07-17 17:22:04,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-17 17:22:04,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-17 17:22:04,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-17 17:22:04,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-17 17:22:04,842 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 32 [2020-07-17 17:22:04,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:04,842 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-17 17:22:04,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 17:22:04,843 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-17 17:22:04,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-17 17:22:04,844 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:04,845 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:04,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 17:22:04,845 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:04,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:04,846 INFO L82 PathProgramCache]: Analyzing trace with hash 23346727, now seen corresponding path program 3 times [2020-07-17 17:22:04,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:04,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208033602] [2020-07-17 17:22:04,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:04,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:05,001 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-17 17:22:05,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208033602] [2020-07-17 17:22:05,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:05,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-17 17:22:05,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974822810] [2020-07-17 17:22:05,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 17:22:05,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:05,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 17:22:05,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-17 17:22:05,005 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 8 states. [2020-07-17 17:22:05,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:05,099 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2020-07-17 17:22:05,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 17:22:05,100 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-07-17 17:22:05,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:05,102 INFO L225 Difference]: With dead ends: 44 [2020-07-17 17:22:05,102 INFO L226 Difference]: Without dead ends: 38 [2020-07-17 17:22:05,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-07-17 17:22:05,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-17 17:22:05,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-07-17 17:22:05,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-17 17:22:05,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-07-17 17:22:05,113 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 40 [2020-07-17 17:22:05,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:05,113 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-07-17 17:22:05,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 17:22:05,114 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-07-17 17:22:05,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-17 17:22:05,115 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:05,116 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:05,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 17:22:05,116 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:05,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:05,117 INFO L82 PathProgramCache]: Analyzing trace with hash -649675855, now seen corresponding path program 4 times [2020-07-17 17:22:05,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:05,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733882950] [2020-07-17 17:22:05,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:05,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:05,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:05,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:05,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:05,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:05,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:05,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:05,324 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-17 17:22:05,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733882950] [2020-07-17 17:22:05,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:05,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-17 17:22:05,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87663093] [2020-07-17 17:22:05,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 17:22:05,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:05,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 17:22:05,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-07-17 17:22:05,327 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 9 states. [2020-07-17 17:22:05,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:05,407 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-17 17:22:05,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 17:22:05,408 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-07-17 17:22:05,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:05,409 INFO L225 Difference]: With dead ends: 49 [2020-07-17 17:22:05,409 INFO L226 Difference]: Without dead ends: 43 [2020-07-17 17:22:05,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-07-17 17:22:05,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-17 17:22:05,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-07-17 17:22:05,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-17 17:22:05,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-07-17 17:22:05,420 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 48 [2020-07-17 17:22:05,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:05,421 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-07-17 17:22:05,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 17:22:05,421 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-07-17 17:22:05,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-17 17:22:05,423 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:05,423 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:05,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-17 17:22:05,423 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:05,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:05,424 INFO L82 PathProgramCache]: Analyzing trace with hash 899977063, now seen corresponding path program 5 times [2020-07-17 17:22:05,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:05,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535553968] [2020-07-17 17:22:05,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:05,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 17:22:05,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 17:22:05,465 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-17 17:22:05,466 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 17:22:05,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-17 17:22:05,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 05:22:05 BoogieIcfgContainer [2020-07-17 17:22:05,499 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 17:22:05,502 INFO L168 Benchmark]: Toolchain (without parser) took 2207.23 ms. Allocated memory was 142.1 MB in the beginning and 231.2 MB in the end (delta: 89.1 MB). Free memory was 100.2 MB in the beginning and 149.4 MB in the end (delta: -49.1 MB). Peak memory consumption was 40.0 MB. Max. memory is 7.1 GB. [2020-07-17 17:22:05,503 INFO L168 Benchmark]: CDTParser took 0.91 ms. Allocated memory is still 142.1 MB. Free memory was 118.8 MB in the beginning and 118.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-17 17:22:05,503 INFO L168 Benchmark]: CACSL2BoogieTranslator took 210.48 ms. Allocated memory is still 142.1 MB. Free memory was 99.8 MB in the beginning and 90.7 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-07-17 17:22:05,504 INFO L168 Benchmark]: Boogie Preprocessor took 25.50 ms. Allocated memory is still 142.1 MB. Free memory was 90.7 MB in the beginning and 89.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-17 17:22:05,505 INFO L168 Benchmark]: RCFGBuilder took 302.11 ms. Allocated memory was 142.1 MB in the beginning and 200.8 MB in the end (delta: 58.7 MB). Free memory was 89.3 MB in the beginning and 169.2 MB in the end (delta: -79.9 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-17 17:22:05,506 INFO L168 Benchmark]: TraceAbstraction took 1662.90 ms. Allocated memory was 200.8 MB in the beginning and 231.2 MB in the end (delta: 30.4 MB). Free memory was 168.5 MB in the beginning and 149.4 MB in the end (delta: 19.2 MB). Peak memory consumption was 49.6 MB. Max. memory is 7.1 GB. [2020-07-17 17:22:05,510 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.91 ms. Allocated memory is still 142.1 MB. Free memory was 118.8 MB in the beginning and 118.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 210.48 ms. Allocated memory is still 142.1 MB. Free memory was 99.8 MB in the beginning and 90.7 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.50 ms. Allocated memory is still 142.1 MB. Free memory was 90.7 MB in the beginning and 89.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 302.11 ms. Allocated memory was 142.1 MB in the beginning and 200.8 MB in the end (delta: 58.7 MB). Free memory was 89.3 MB in the beginning and 169.2 MB in the end (delta: -79.9 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1662.90 ms. Allocated memory was 200.8 MB in the beginning and 231.2 MB in the end (delta: 30.4 MB). Free memory was 168.5 MB in the beginning and 149.4 MB in the end (delta: 19.2 MB). Peak memory consumption was 49.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 5; VAL [input=5] [L11] CALL, EXPR id(input) VAL [\old(x)=5] [L5] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L6] CALL, EXPR id(x-1) VAL [\old(x)=4] [L5] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L6] CALL, EXPR id(x-1) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 VAL [\old(x)=0, x=0] [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; VAL [\old(x)=1, \result=1, id(x-1)=0, x=1] [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; VAL [\old(x)=2, \result=2, id(x-1)=1, x=2] [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; VAL [\old(x)=3, \result=3, id(x-1)=2, x=3] [L6] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] return id(x-1) + 1; VAL [\old(x)=4, \result=4, id(x-1)=3, x=4] [L6] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] return id(x-1) + 1; VAL [\old(x)=5, \result=5, id(x-1)=4, x=5] [L11] RET, EXPR id(input) VAL [id(input)=5, input=5] [L11] int result = id(input); VAL [id(input)=5, input=5, result=5] [L12] COND TRUE result == 5 VAL [input=5, result=5] [L13] __VERIFIER_error() VAL [input=5, result=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.5s, OverallIterations: 6, TraceHistogramMax: 6, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 94 SDtfs, 111 SDslu, 235 SDs, 0 SdLazy, 100 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 216 NumberOfCodeBlocks, 216 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 155 ConstructedInterpolants, 0 QuantifiedInterpolants, 12455 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 50/120 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...