/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-memsafety/openbsd_cmemset-alloca-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 16:49:45,103 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 16:49:45,108 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 16:49:45,163 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 16:49:45,164 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 16:49:45,168 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 16:49:45,172 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 16:49:45,178 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 16:49:45,181 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 16:49:45,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 16:49:45,194 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 16:49:45,195 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 16:49:45,195 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 16:49:45,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 16:49:45,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 16:49:45,203 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 16:49:45,204 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 16:49:45,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 16:49:45,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 16:49:45,219 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 16:49:45,226 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 16:49:45,227 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 16:49:45,228 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 16:49:45,232 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 16:49:45,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 16:49:45,254 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 16:49:45,255 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 16:49:45,256 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 16:49:45,256 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 16:49:45,259 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 16:49:45,260 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 16:49:45,261 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 16:49:45,262 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 16:49:45,263 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 16:49:45,265 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 16:49:45,265 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 16:49:45,266 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 16:49:45,266 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 16:49:45,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 16:49:45,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 16:49:45,268 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 16:49:45,273 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-23 16:49:45,322 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 16:49:45,322 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 16:49:45,326 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 16:49:45,327 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 16:49:45,327 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 16:49:45,327 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 16:49:45,328 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-23 16:49:45,328 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 16:49:45,328 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 16:49:45,328 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-23 16:49:45,330 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-23 16:49:45,330 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-23 16:49:45,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 16:49:45,330 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-23 16:49:45,331 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 16:49:45,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 16:49:45,331 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 16:49:45,331 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 16:49:45,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 16:49:45,332 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 16:49:45,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 16:49:45,332 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 16:49:45,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 16:49:45,333 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 16:49:45,333 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 16:49:45,740 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 16:49:45,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 16:49:45,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 16:49:45,782 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 16:49:45,783 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 16:49:45,784 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cmemset-alloca-1.i [2020-12-23 16:49:45,883 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d47937506/d44250dd7c024264b6abe3383147bdf2/FLAGf40fdb30e [2020-12-23 16:49:46,600 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 16:49:46,603 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cmemset-alloca-1.i [2020-12-23 16:49:46,627 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d47937506/d44250dd7c024264b6abe3383147bdf2/FLAGf40fdb30e [2020-12-23 16:49:46,650 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d47937506/d44250dd7c024264b6abe3383147bdf2 [2020-12-23 16:49:46,654 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 16:49:46,657 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 16:49:46,660 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 16:49:46,661 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 16:49:46,666 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 16:49:46,668 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:49:46" (1/1) ... [2020-12-23 16:49:46,671 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54d56412 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:46, skipping insertion in model container [2020-12-23 16:49:46,671 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:49:46" (1/1) ... [2020-12-23 16:49:46,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 16:49:46,740 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: address: IdentifierExpression[#t~post3,] left hand side expression in assignment: lhs: VariableLHS[~length~0,] left hand side expression in assignment: lhs: VariableLHS[~n~0,] [2020-12-23 16:49:47,158 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:49:47,170 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: address: IdentifierExpression[#t~post3,] left hand side expression in assignment: lhs: VariableLHS[~length~0,] left hand side expression in assignment: lhs: VariableLHS[~n~0,] [2020-12-23 16:49:47,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:49:47,298 INFO L208 MainTranslator]: Completed translation [2020-12-23 16:49:47,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:47 WrapperNode [2020-12-23 16:49:47,299 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 16:49:47,300 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 16:49:47,301 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 16:49:47,301 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 16:49:47,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:47" (1/1) ... [2020-12-23 16:49:47,326 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:47" (1/1) ... [2020-12-23 16:49:47,351 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 16:49:47,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 16:49:47,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 16:49:47,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 16:49:47,361 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:47" (1/1) ... [2020-12-23 16:49:47,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:47" (1/1) ... [2020-12-23 16:49:47,368 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:47" (1/1) ... [2020-12-23 16:49:47,368 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:47" (1/1) ... [2020-12-23 16:49:47,373 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:47" (1/1) ... [2020-12-23 16:49:47,377 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:47" (1/1) ... [2020-12-23 16:49:47,379 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:47" (1/1) ... [2020-12-23 16:49:47,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 16:49:47,383 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 16:49:47,383 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 16:49:47,383 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 16:49:47,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:47" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 16:49:47,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 16:49:47,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 16:49:47,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 16:49:47,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 16:49:47,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 16:49:47,812 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 16:49:47,812 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-23 16:49:47,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:49:47 BoogieIcfgContainer [2020-12-23 16:49:47,814 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 16:49:47,816 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 16:49:47,816 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 16:49:47,819 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 16:49:47,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 04:49:46" (1/3) ... [2020-12-23 16:49:47,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1291179d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:49:47, skipping insertion in model container [2020-12-23 16:49:47,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:47" (2/3) ... [2020-12-23 16:49:47,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1291179d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:49:47, skipping insertion in model container [2020-12-23 16:49:47,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:49:47" (3/3) ... [2020-12-23 16:49:47,823 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cmemset-alloca-1.i [2020-12-23 16:49:47,830 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 16:49:47,835 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-23 16:49:47,858 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-23 16:49:47,884 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 16:49:47,884 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-23 16:49:47,885 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 16:49:47,885 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 16:49:47,885 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 16:49:47,885 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 16:49:47,885 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 16:49:47,886 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 16:49:47,906 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-12-23 16:49:47,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 16:49:47,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:47,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:47,931 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-23 16:49:47,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:47,950 INFO L82 PathProgramCache]: Analyzing trace with hash 121322254, now seen corresponding path program 1 times [2020-12-23 16:49:47,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:47,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086113407] [2020-12-23 16:49:47,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:48,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:48,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:48,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086113407] [2020-12-23 16:49:48,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:49:48,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:49:48,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642238641] [2020-12-23 16:49:48,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:49:48,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:48,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:49:48,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:49:48,243 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2020-12-23 16:49:48,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:48,333 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-12-23 16:49:48,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:49:48,336 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-23 16:49:48,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:48,346 INFO L225 Difference]: With dead ends: 20 [2020-12-23 16:49:48,346 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 16:49:48,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:49:48,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 16:49:48,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-12-23 16:49:48,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 16:49:48,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2020-12-23 16:49:48,386 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 8 [2020-12-23 16:49:48,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:48,387 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-12-23 16:49:48,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:49:48,387 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2020-12-23 16:49:48,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 16:49:48,388 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:48,388 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:48,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 16:49:48,388 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-23 16:49:48,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:48,390 INFO L82 PathProgramCache]: Analyzing trace with hash 121322255, now seen corresponding path program 1 times [2020-12-23 16:49:48,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:48,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068217744] [2020-12-23 16:49:48,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:48,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:48,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:48,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068217744] [2020-12-23 16:49:48,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:49:48,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:49:48,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336733196] [2020-12-23 16:49:48,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:49:48,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:48,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:49:48,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:49:48,506 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 6 states. [2020-12-23 16:49:48,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:48,602 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-12-23 16:49:48,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:49:48,603 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-23 16:49:48,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:48,604 INFO L225 Difference]: With dead ends: 24 [2020-12-23 16:49:48,605 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 16:49:48,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:49:48,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 16:49:48,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2020-12-23 16:49:48,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 16:49:48,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-12-23 16:49:48,611 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 8 [2020-12-23 16:49:48,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:48,612 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-12-23 16:49:48,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:49:48,612 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-12-23 16:49:48,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 16:49:48,613 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:48,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:48,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 16:49:48,614 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-23 16:49:48,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:48,615 INFO L82 PathProgramCache]: Analyzing trace with hash -533363702, now seen corresponding path program 1 times [2020-12-23 16:49:48,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:48,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332619757] [2020-12-23 16:49:48,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:48,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:48,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:48,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332619757] [2020-12-23 16:49:48,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:49:48,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:49:48,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339727938] [2020-12-23 16:49:48,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:49:48,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:48,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:49:48,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:49:48,693 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 4 states. [2020-12-23 16:49:48,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:48,728 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-12-23 16:49:48,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:49:48,729 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-23 16:49:48,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:48,730 INFO L225 Difference]: With dead ends: 34 [2020-12-23 16:49:48,730 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 16:49:48,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:49:48,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 16:49:48,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 20. [2020-12-23 16:49:48,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 16:49:48,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-12-23 16:49:48,736 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 9 [2020-12-23 16:49:48,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:48,736 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-12-23 16:49:48,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:49:48,737 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-12-23 16:49:48,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 16:49:48,737 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:48,738 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:48,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 16:49:48,738 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-23 16:49:48,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:48,739 INFO L82 PathProgramCache]: Analyzing trace with hash -476105400, now seen corresponding path program 1 times [2020-12-23 16:49:48,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:48,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626528800] [2020-12-23 16:49:48,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:48,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:48,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626528800] [2020-12-23 16:49:48,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:49:48,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:49:48,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360976307] [2020-12-23 16:49:48,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:49:48,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:48,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:49:48,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:49:48,815 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 5 states. [2020-12-23 16:49:48,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:48,843 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-12-23 16:49:48,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:49:48,844 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-23 16:49:48,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:48,845 INFO L225 Difference]: With dead ends: 22 [2020-12-23 16:49:48,845 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 16:49:48,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:49:48,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 16:49:48,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2020-12-23 16:49:48,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 16:49:48,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-12-23 16:49:48,849 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 9 [2020-12-23 16:49:48,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:48,849 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-12-23 16:49:48,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:49:48,850 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-12-23 16:49:48,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 16:49:48,850 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:48,851 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:48,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 16:49:48,851 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-23 16:49:48,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:48,852 INFO L82 PathProgramCache]: Analyzing trace with hash 188498229, now seen corresponding path program 1 times [2020-12-23 16:49:48,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:48,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635412838] [2020-12-23 16:49:48,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:48,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:48,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635412838] [2020-12-23 16:49:48,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:49:48,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:49:48,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458323994] [2020-12-23 16:49:48,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:49:48,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:48,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:49:48,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:49:48,965 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 5 states. [2020-12-23 16:49:49,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:49,010 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2020-12-23 16:49:49,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:49:49,011 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-23 16:49:49,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:49,012 INFO L225 Difference]: With dead ends: 29 [2020-12-23 16:49:49,012 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 16:49:49,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:49:49,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 16:49:49,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2020-12-23 16:49:49,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 16:49:49,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-12-23 16:49:49,017 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 13 [2020-12-23 16:49:49,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:49,017 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-12-23 16:49:49,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:49:49,017 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-12-23 16:49:49,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 16:49:49,018 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:49,018 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:49,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 16:49:49,019 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-23 16:49:49,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:49,019 INFO L82 PathProgramCache]: Analyzing trace with hash -204528781, now seen corresponding path program 1 times [2020-12-23 16:49:49,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:49,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886329170] [2020-12-23 16:49:49,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:49,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:49,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:49,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886329170] [2020-12-23 16:49:49,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154751271] [2020-12-23 16:49:49,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:49,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:49,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 16:49:49,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:49,417 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 16:49:49,418 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:49,425 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:49,426 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:49,426 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 16:49:49,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:49,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:49,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-12-23 16:49:49,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648857793] [2020-12-23 16:49:49,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 16:49:49,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:49,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 16:49:49,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-12-23 16:49:49,653 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 16 states. [2020-12-23 16:49:49,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:49,911 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-12-23 16:49:49,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 16:49:49,912 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 16:49:49,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:49,914 INFO L225 Difference]: With dead ends: 31 [2020-12-23 16:49:49,914 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 16:49:49,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2020-12-23 16:49:49,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 16:49:49,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-12-23 16:49:49,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 16:49:49,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-12-23 16:49:49,924 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 13 [2020-12-23 16:49:49,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:49,926 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-12-23 16:49:49,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 16:49:49,926 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-12-23 16:49:49,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 16:49:49,927 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:49,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:50,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 16:49:50,149 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-23 16:49:50,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:50,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1548436090, now seen corresponding path program 1 times [2020-12-23 16:49:50,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:50,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313439460] [2020-12-23 16:49:50,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:50,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:50,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:50,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313439460] [2020-12-23 16:49:50,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:49:50,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:49:50,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127110775] [2020-12-23 16:49:50,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:49:50,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:50,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:49:50,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:49:50,270 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 4 states. [2020-12-23 16:49:50,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:50,287 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-12-23 16:49:50,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:49:50,288 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-23 16:49:50,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:50,289 INFO L225 Difference]: With dead ends: 29 [2020-12-23 16:49:50,289 INFO L226 Difference]: Without dead ends: 19 [2020-12-23 16:49:50,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:49:50,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-23 16:49:50,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-23 16:49:50,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 16:49:50,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-12-23 16:49:50,297 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2020-12-23 16:49:50,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:50,297 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-12-23 16:49:50,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:49:50,297 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-12-23 16:49:50,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 16:49:50,299 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:50,299 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:50,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 16:49:50,299 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-23 16:49:50,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:50,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1854015663, now seen corresponding path program 2 times [2020-12-23 16:49:50,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:50,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557321758] [2020-12-23 16:49:50,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:50,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:50,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:50,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557321758] [2020-12-23 16:49:50,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831642891] [2020-12-23 16:49:50,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:50,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:49:50,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:50,766 WARN L261 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 16:49:50,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:50,788 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 16:49:50,789 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:50,793 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:50,794 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:50,795 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-23 16:49:51,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:51,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:51,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2020-12-23 16:49:51,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730451338] [2020-12-23 16:49:51,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 16:49:51,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:51,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 16:49:51,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-12-23 16:49:51,066 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 19 states. [2020-12-23 16:49:51,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:51,720 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2020-12-23 16:49:51,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 16:49:51,720 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2020-12-23 16:49:51,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:51,721 INFO L225 Difference]: With dead ends: 30 [2020-12-23 16:49:51,721 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 16:49:51,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2020-12-23 16:49:51,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 16:49:51,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-12-23 16:49:51,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 16:49:51,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-12-23 16:49:51,725 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 18 [2020-12-23 16:49:51,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:51,726 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-12-23 16:49:51,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 16:49:51,726 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-12-23 16:49:51,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 16:49:51,727 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:51,727 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:51,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:51,944 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-23 16:49:51,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:51,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1405416593, now seen corresponding path program 3 times [2020-12-23 16:49:51,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:51,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542393160] [2020-12-23 16:49:51,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:51,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:52,448 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:52,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542393160] [2020-12-23 16:49:52,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731538071] [2020-12-23 16:49:52,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:52,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 16:49:52,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:52,604 WARN L261 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-23 16:49:52,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:52,622 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 16:49:52,623 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:52,628 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:52,629 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:52,629 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-23 16:49:53,193 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:53,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:53,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2020-12-23 16:49:53,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605362665] [2020-12-23 16:49:53,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 16:49:53,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:53,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 16:49:53,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2020-12-23 16:49:53,202 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 27 states. [2020-12-23 16:49:54,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:54,307 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-12-23 16:49:54,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 16:49:54,312 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 28 [2020-12-23 16:49:54,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:54,313 INFO L225 Difference]: With dead ends: 34 [2020-12-23 16:49:54,313 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 16:49:54,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=166, Invalid=1474, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 16:49:54,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 16:49:54,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 16:49:54,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 16:49:54,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 16:49:54,315 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2020-12-23 16:49:54,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:54,316 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 16:49:54,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 16:49:54,316 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 16:49:54,316 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 16:49:54,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:54,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 04:49:54 BoogieIcfgContainer [2020-12-23 16:49:54,537 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 16:49:54,537 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 16:49:54,537 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 16:49:54,537 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 16:49:54,538 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:49:47" (3/4) ... [2020-12-23 16:49:54,542 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 16:49:54,554 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-12-23 16:49:54,554 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-23 16:49:54,554 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-23 16:49:54,607 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/array-memsafety/openbsd_cmemset-alloca-1.i-witness.graphml [2020-12-23 16:49:54,607 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 16:49:54,612 INFO L168 Benchmark]: Toolchain (without parser) took 7951.55 ms. Allocated memory was 155.2 MB in the beginning and 224.4 MB in the end (delta: 69.2 MB). Free memory was 129.3 MB in the beginning and 190.6 MB in the end (delta: -61.3 MB). Peak memory consumption was 8.7 MB. Max. memory is 8.0 GB. [2020-12-23 16:49:54,612 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 155.2 MB. Free memory was 128.8 MB in the beginning and 128.7 MB in the end (delta: 84.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 16:49:54,613 INFO L168 Benchmark]: CACSL2BoogieTranslator took 639.24 ms. Allocated memory is still 155.2 MB. Free memory was 129.0 MB in the beginning and 108.8 MB in the end (delta: 20.3 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2020-12-23 16:49:54,614 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.47 ms. Allocated memory is still 155.2 MB. Free memory was 108.8 MB in the beginning and 107.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 16:49:54,616 INFO L168 Benchmark]: Boogie Preprocessor took 30.39 ms. Allocated memory is still 155.2 MB. Free memory was 107.1 MB in the beginning and 106.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 16:49:54,616 INFO L168 Benchmark]: RCFGBuilder took 431.23 ms. Allocated memory is still 155.2 MB. Free memory was 105.8 MB in the beginning and 125.4 MB in the end (delta: -19.6 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. [2020-12-23 16:49:54,617 INFO L168 Benchmark]: TraceAbstraction took 6721.05 ms. Allocated memory was 155.2 MB in the beginning and 224.4 MB in the end (delta: 69.2 MB). Free memory was 124.9 MB in the beginning and 193.3 MB in the end (delta: -68.5 MB). Peak memory consumption was 1.3 MB. Max. memory is 8.0 GB. [2020-12-23 16:49:54,617 INFO L168 Benchmark]: Witness Printer took 70.26 ms. Allocated memory is still 224.4 MB. Free memory was 193.3 MB in the beginning and 190.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 16:49:54,625 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 155.2 MB. Free memory was 128.8 MB in the beginning and 128.7 MB in the end (delta: 84.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 639.24 ms. Allocated memory is still 155.2 MB. Free memory was 129.0 MB in the beginning and 108.8 MB in the end (delta: 20.3 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 50.47 ms. Allocated memory is still 155.2 MB. Free memory was 108.8 MB in the beginning and 107.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.39 ms. Allocated memory is still 155.2 MB. Free memory was 107.1 MB in the beginning and 106.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 431.23 ms. Allocated memory is still 155.2 MB. Free memory was 105.8 MB in the beginning and 125.4 MB in the end (delta: -19.6 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6721.05 ms. Allocated memory was 155.2 MB in the beginning and 224.4 MB in the end (delta: 69.2 MB). Free memory was 124.9 MB in the beginning and 193.3 MB in the end (delta: -68.5 MB). Peak memory consumption was 1.3 MB. Max. memory is 8.0 GB. * Witness Printer took 70.26 ms. Allocated memory is still 224.4 MB. Free memory was 193.3 MB in the beginning and 190.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 523]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.6s, OverallIterations: 9, TraceHistogramMax: 5, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 122 SDtfs, 154 SDslu, 546 SDs, 0 SdLazy, 751 SolverSat, 38 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 160 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=6, 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, 9 MinimizatonAttempts, 32 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 179 NumberOfCodeBlocks, 179 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 167 ConstructedInterpolants, 0 QuantifiedInterpolants, 34547 SizeOfPredicates, 44 NumberOfNonLiveVariables, 316 ConjunctsInSsa, 157 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 PerfectInterpolantSequences, 7/100 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 correct! Received shutdown request...