./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrlen_unsafe.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/cstrlen_unsafe.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1fa4bda6bd30ba2cdf5e016e12b6593fa4b1ef45b4dc13eb01e28da7c534ab67 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 16:25:10,223 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 16:25:10,225 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 16:25:10,247 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 16:25:10,250 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 16:25:10,251 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 16:25:10,254 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 16:25:10,257 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 16:25:10,259 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 16:25:10,260 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 16:25:10,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 16:25:10,263 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 16:25:10,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 16:25:10,268 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 16:25:10,269 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 16:25:10,271 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 16:25:10,273 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 16:25:10,274 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 16:25:10,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 16:25:10,281 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 16:25:10,282 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 16:25:10,283 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 16:25:10,284 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 16:25:10,287 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 16:25:10,288 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 16:25:10,289 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 16:25:10,290 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 16:25:10,290 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 16:25:10,291 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 16:25:10,292 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 16:25:10,292 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 16:25:10,292 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 16:25:10,293 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 16:25:10,294 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 16:25:10,295 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 16:25:10,295 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 16:25:10,296 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 16:25:10,296 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 16:25:10,296 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 16:25:10,297 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 16:25:10,297 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 16:25:10,298 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-22 16:25:10,313 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 16:25:10,315 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 16:25:10,316 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 16:25:10,316 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 16:25:10,317 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 16:25:10,317 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 16:25:10,317 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 16:25:10,318 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 16:25:10,318 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 16:25:10,318 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 16:25:10,319 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 16:25:10,319 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 16:25:10,319 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 16:25:10,319 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 16:25:10,319 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 16:25:10,320 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 16:25:10,320 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 16:25:10,320 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 16:25:10,320 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 16:25:10,320 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 16:25:10,320 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 16:25:10,320 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 16:25:10,321 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 16:25:10,321 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 16:25:10,321 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 16:25:10,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:25:10,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 16:25:10,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 16:25:10,323 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 16:25:10,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 16:25:10,323 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 16:25:10,323 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fa4bda6bd30ba2cdf5e016e12b6593fa4b1ef45b4dc13eb01e28da7c534ab67 [2021-12-22 16:25:10,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 16:25:10,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 16:25:10,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 16:25:10,680 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 16:25:10,682 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 16:25:10,683 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrlen_unsafe.i [2021-12-22 16:25:10,746 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab9fea49e/91a2274f926f46ffb49ae99a382afb15/FLAGe938ff5a1 [2021-12-22 16:25:11,123 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 16:25:11,124 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrlen_unsafe.i [2021-12-22 16:25:11,135 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab9fea49e/91a2274f926f46ffb49ae99a382afb15/FLAGe938ff5a1 [2021-12-22 16:25:11,528 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab9fea49e/91a2274f926f46ffb49ae99a382afb15 [2021-12-22 16:25:11,530 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 16:25:11,531 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 16:25:11,534 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 16:25:11,535 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 16:25:11,538 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 16:25:11,538 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:25:11" (1/1) ... [2021-12-22 16:25:11,541 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@226cac73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:11, skipping insertion in model container [2021-12-22 16:25:11,541 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:25:11" (1/1) ... [2021-12-22 16:25:11,547 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 16:25:11,588 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 16:25:11,862 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:25:11,869 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 16:25:11,909 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:25:11,927 INFO L208 MainTranslator]: Completed translation [2021-12-22 16:25:11,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:11 WrapperNode [2021-12-22 16:25:11,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 16:25:11,929 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 16:25:11,929 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 16:25:11,930 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 16:25:11,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:11" (1/1) ... [2021-12-22 16:25:11,950 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:11" (1/1) ... [2021-12-22 16:25:11,969 INFO L137 Inliner]: procedures = 118, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 52 [2021-12-22 16:25:11,970 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 16:25:11,970 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 16:25:11,970 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 16:25:11,971 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 16:25:11,976 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:11" (1/1) ... [2021-12-22 16:25:11,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:11" (1/1) ... [2021-12-22 16:25:11,980 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:11" (1/1) ... [2021-12-22 16:25:11,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:11" (1/1) ... [2021-12-22 16:25:11,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:11" (1/1) ... [2021-12-22 16:25:11,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:11" (1/1) ... [2021-12-22 16:25:11,998 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:11" (1/1) ... [2021-12-22 16:25:12,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 16:25:12,010 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 16:25:12,010 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 16:25:12,010 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 16:25:12,011 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:11" (1/1) ... [2021-12-22 16:25:12,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:25:12,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:25:12,051 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 16:25:12,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 16:25:12,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 16:25:12,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 16:25:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 16:25:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 16:25:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 16:25:12,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 16:25:12,161 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 16:25:12,162 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 16:25:12,268 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 16:25:12,272 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 16:25:12,272 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-22 16:25:12,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:25:12 BoogieIcfgContainer [2021-12-22 16:25:12,273 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 16:25:12,275 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 16:25:12,275 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 16:25:12,277 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 16:25:12,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:25:11" (1/3) ... [2021-12-22 16:25:12,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@380bf811 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:25:12, skipping insertion in model container [2021-12-22 16:25:12,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:11" (2/3) ... [2021-12-22 16:25:12,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@380bf811 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:25:12, skipping insertion in model container [2021-12-22 16:25:12,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:25:12" (3/3) ... [2021-12-22 16:25:12,279 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrlen_unsafe.i [2021-12-22 16:25:12,282 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 16:25:12,283 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-12-22 16:25:12,310 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 16:25:12,314 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 16:25:12,315 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-12-22 16:25:12,324 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 20 states have (on average 1.75) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:12,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 16:25:12,328 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:12,329 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 16:25:12,329 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-12-22 16:25:12,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:12,333 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-12-22 16:25:12,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:25:12,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901230130] [2021-12-22 16:25:12,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:25:12,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:25:12,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:25:12,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:25:12,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:25:12,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901230130] [2021-12-22 16:25:12,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901230130] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:25:12,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:25:12,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:25:12,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233917444] [2021-12-22 16:25:12,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:25:12,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:25:12,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:25:12,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:25:12,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:25:12,492 INFO L87 Difference]: Start difference. First operand has 31 states, 20 states have (on average 1.75) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:12,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:12,526 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2021-12-22 16:25:12,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:25:12,529 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-22 16:25:12,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:12,534 INFO L225 Difference]: With dead ends: 54 [2021-12-22 16:25:12,535 INFO L226 Difference]: Without dead ends: 50 [2021-12-22 16:25:12,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:25:12,539 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 23 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:12,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 76 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:25:12,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-22 16:25:12,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 31. [2021-12-22 16:25:12,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:12,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-12-22 16:25:12,563 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 6 [2021-12-22 16:25:12,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:12,564 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-12-22 16:25:12,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:12,564 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-12-22 16:25:12,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 16:25:12,564 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:12,565 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 16:25:12,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 16:25:12,565 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-12-22 16:25:12,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:12,566 INFO L85 PathProgramCache]: Analyzing trace with hash 889508820, now seen corresponding path program 1 times [2021-12-22 16:25:12,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:25:12,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392591755] [2021-12-22 16:25:12,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:25:12,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:25:12,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:25:12,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:25:12,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:25:12,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392591755] [2021-12-22 16:25:12,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392591755] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:25:12,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:25:12,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 16:25:12,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291302044] [2021-12-22 16:25:12,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:25:12,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:25:12,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:25:12,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:25:12,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:25:12,597 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:12,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:12,612 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-12-22 16:25:12,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:25:12,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-22 16:25:12,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:12,613 INFO L225 Difference]: With dead ends: 29 [2021-12-22 16:25:12,614 INFO L226 Difference]: Without dead ends: 29 [2021-12-22 16:25:12,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:25:12,615 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:12,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 22 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:25:12,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-22 16:25:12,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-22 16:25:12,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:12,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-12-22 16:25:12,618 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 6 [2021-12-22 16:25:12,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:12,619 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-12-22 16:25:12,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:12,619 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-12-22 16:25:12,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 16:25:12,619 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:12,620 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 16:25:12,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 16:25:12,620 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-12-22 16:25:12,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:12,621 INFO L85 PathProgramCache]: Analyzing trace with hash 889508821, now seen corresponding path program 1 times [2021-12-22 16:25:12,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:25:12,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493823380] [2021-12-22 16:25:12,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:25:12,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:25:12,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:25:12,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:25:12,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:25:12,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493823380] [2021-12-22 16:25:12,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493823380] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:25:12,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:25:12,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:25:12,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904695841] [2021-12-22 16:25:12,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:25:12,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:25:12,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:25:12,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:25:12,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:25:12,660 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:12,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:12,701 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-12-22 16:25:12,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:25:12,702 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-22 16:25:12,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:12,703 INFO L225 Difference]: With dead ends: 28 [2021-12-22 16:25:12,703 INFO L226 Difference]: Without dead ends: 28 [2021-12-22 16:25:12,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:25:12,707 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 46 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:12,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 20 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:25:12,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-22 16:25:12,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-22 16:25:12,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:12,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-12-22 16:25:12,715 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 6 [2021-12-22 16:25:12,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:12,715 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-12-22 16:25:12,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:12,716 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-12-22 16:25:12,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 16:25:12,716 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:12,717 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 16:25:12,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 16:25:12,717 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-12-22 16:25:12,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:12,718 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2021-12-22 16:25:12,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:25:12,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104138938] [2021-12-22 16:25:12,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:25:12,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:25:12,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:25:12,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:25:12,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:25:12,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104138938] [2021-12-22 16:25:12,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104138938] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:25:12,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:25:12,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:25:12,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630210551] [2021-12-22 16:25:12,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:25:12,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:25:12,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:25:12,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:25:12,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:25:12,812 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:12,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:12,836 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2021-12-22 16:25:12,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:25:12,837 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-22 16:25:12,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:12,837 INFO L225 Difference]: With dead ends: 49 [2021-12-22 16:25:12,837 INFO L226 Difference]: Without dead ends: 49 [2021-12-22 16:25:12,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:25:12,839 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 65 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:12,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 37 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:25:12,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-22 16:25:12,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2021-12-22 16:25:12,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.434782608695652) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:12,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-12-22 16:25:12,842 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 6 [2021-12-22 16:25:12,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:12,842 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-12-22 16:25:12,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:12,843 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-12-22 16:25:12,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-22 16:25:12,843 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:12,843 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:25:12,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 16:25:12,844 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-12-22 16:25:12,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:12,845 INFO L85 PathProgramCache]: Analyzing trace with hash -590959631, now seen corresponding path program 1 times [2021-12-22 16:25:12,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:25:12,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487571771] [2021-12-22 16:25:12,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:25:12,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:25:12,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:25:12,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:25:12,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:25:12,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487571771] [2021-12-22 16:25:12,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487571771] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:25:12,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:25:12,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:25:12,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149959315] [2021-12-22 16:25:12,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:25:12,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:25:12,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:25:12,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:25:12,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:25:12,937 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:12,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:12,983 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-12-22 16:25:12,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:25:12,983 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-22 16:25:12,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:12,984 INFO L225 Difference]: With dead ends: 29 [2021-12-22 16:25:12,984 INFO L226 Difference]: Without dead ends: 29 [2021-12-22 16:25:12,984 INFO L932 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 [2021-12-22 16:25:12,986 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 39 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:12,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 31 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:25:12,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-22 16:25:12,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-22 16:25:12,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.391304347826087) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:12,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-12-22 16:25:12,992 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 9 [2021-12-22 16:25:12,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:12,993 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-12-22 16:25:12,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:12,993 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-12-22 16:25:12,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-22 16:25:12,993 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:12,994 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:25:12,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 16:25:12,994 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-12-22 16:25:12,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:12,995 INFO L85 PathProgramCache]: Analyzing trace with hash -590959630, now seen corresponding path program 1 times [2021-12-22 16:25:12,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:25:12,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612000672] [2021-12-22 16:25:12,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:25:12,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:25:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:25:13,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:25:13,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:25:13,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612000672] [2021-12-22 16:25:13,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612000672] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:25:13,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:25:13,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 16:25:13,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223241840] [2021-12-22 16:25:13,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:25:13,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 16:25:13,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:25:13,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 16:25:13,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:25:13,091 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:13,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:13,140 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-12-22 16:25:13,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 16:25:13,141 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-22 16:25:13,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:13,141 INFO L225 Difference]: With dead ends: 41 [2021-12-22 16:25:13,142 INFO L226 Difference]: Without dead ends: 41 [2021-12-22 16:25:13,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-22 16:25:13,142 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 101 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:13,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 39 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:25:13,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-22 16:25:13,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2021-12-22 16:25:13,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.375) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:13,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-12-22 16:25:13,145 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 9 [2021-12-22 16:25:13,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:13,146 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-12-22 16:25:13,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:13,146 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-12-22 16:25:13,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 16:25:13,146 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:13,146 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:25:13,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 16:25:13,147 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-12-22 16:25:13,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:13,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-12-22 16:25:13,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:25:13,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860819163] [2021-12-22 16:25:13,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:25:13,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:25:13,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:25:13,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:25:13,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:25:13,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860819163] [2021-12-22 16:25:13,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860819163] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:25:13,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365044888] [2021-12-22 16:25:13,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:25:13,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:25:13,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:25:13,239 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:25:13,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 16:25:13,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:25:13,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 16:25:13,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:25:13,356 INFO L387 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 [2021-12-22 16:25:13,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:25:13,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:25:13,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:25:13,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365044888] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:25:13,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:25:13,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-12-22 16:25:13,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754204454] [2021-12-22 16:25:13,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:25:13,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 16:25:13,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:25:13,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 16:25:13,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-22 16:25:13,599 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:13,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:13,703 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2021-12-22 16:25:13,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 16:25:13,705 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-22 16:25:13,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:13,707 INFO L225 Difference]: With dead ends: 66 [2021-12-22 16:25:13,707 INFO L226 Difference]: Without dead ends: 66 [2021-12-22 16:25:13,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-12-22 16:25:13,708 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 183 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:13,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 133 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:25:13,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-22 16:25:13,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 27. [2021-12-22 16:25:13,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:13,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-12-22 16:25:13,717 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 10 [2021-12-22 16:25:13,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:13,718 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-12-22 16:25:13,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:13,718 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-12-22 16:25:13,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-22 16:25:13,718 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:13,718 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:25:13,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 16:25:13,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:25:13,935 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-12-22 16:25:13,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:13,936 INFO L85 PathProgramCache]: Analyzing trace with hash -976521877, now seen corresponding path program 1 times [2021-12-22 16:25:13,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:25:13,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222308518] [2021-12-22 16:25:13,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:25:13,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:25:13,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:25:14,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:25:14,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:25:14,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222308518] [2021-12-22 16:25:14,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222308518] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:25:14,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:25:14,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 16:25:14,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252815075] [2021-12-22 16:25:14,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:25:14,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 16:25:14,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:25:14,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 16:25:14,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-22 16:25:14,107 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:14,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:14,219 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-12-22 16:25:14,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 16:25:14,220 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-22 16:25:14,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:14,221 INFO L225 Difference]: With dead ends: 42 [2021-12-22 16:25:14,221 INFO L226 Difference]: Without dead ends: 42 [2021-12-22 16:25:14,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-12-22 16:25:14,222 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 48 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:14,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 124 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:25:14,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-22 16:25:14,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2021-12-22 16:25:14,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:14,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-12-22 16:25:14,231 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 11 [2021-12-22 16:25:14,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:14,231 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-12-22 16:25:14,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:14,231 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-12-22 16:25:14,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-22 16:25:14,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:14,232 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:25:14,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 16:25:14,233 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-12-22 16:25:14,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:14,233 INFO L85 PathProgramCache]: Analyzing trace with hash -296463507, now seen corresponding path program 1 times [2021-12-22 16:25:14,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:25:14,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017678216] [2021-12-22 16:25:14,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:25:14,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:25:14,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:25:14,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:25:14,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:25:14,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017678216] [2021-12-22 16:25:14,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017678216] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:25:14,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:25:14,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 16:25:14,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346827570] [2021-12-22 16:25:14,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:25:14,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 16:25:14,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:25:14,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 16:25:14,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-22 16:25:14,334 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:14,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:14,446 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-12-22 16:25:14,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 16:25:14,447 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-22 16:25:14,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:14,447 INFO L225 Difference]: With dead ends: 51 [2021-12-22 16:25:14,447 INFO L226 Difference]: Without dead ends: 51 [2021-12-22 16:25:14,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-12-22 16:25:14,448 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 85 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:14,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 109 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:25:14,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-22 16:25:14,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 33. [2021-12-22 16:25:14,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:14,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-12-22 16:25:14,451 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 11 [2021-12-22 16:25:14,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:14,452 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-12-22 16:25:14,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:14,452 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-12-22 16:25:14,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-22 16:25:14,452 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:14,453 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:25:14,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 16:25:14,453 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-12-22 16:25:14,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:14,454 INFO L85 PathProgramCache]: Analyzing trace with hash -2134702601, now seen corresponding path program 1 times [2021-12-22 16:25:14,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:25:14,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523404255] [2021-12-22 16:25:14,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:25:14,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:25:14,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:25:14,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:25:14,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:25:14,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523404255] [2021-12-22 16:25:14,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523404255] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:25:14,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:25:14,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:25:14,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136139311] [2021-12-22 16:25:14,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:25:14,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:25:14,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:25:14,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:25:14,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:25:14,483 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:14,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:14,501 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-12-22 16:25:14,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:25:14,502 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-22 16:25:14,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:14,503 INFO L225 Difference]: With dead ends: 32 [2021-12-22 16:25:14,503 INFO L226 Difference]: Without dead ends: 32 [2021-12-22 16:25:14,503 INFO L932 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 [2021-12-22 16:25:14,503 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 39 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:14,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 39 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:25:14,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-22 16:25:14,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-12-22 16:25:14,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.25) internal successors, (35), 31 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:14,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-12-22 16:25:14,506 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 13 [2021-12-22 16:25:14,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:14,506 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-12-22 16:25:14,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:14,506 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-12-22 16:25:14,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-22 16:25:14,507 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:14,507 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:25:14,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 16:25:14,507 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-12-22 16:25:14,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:14,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1751271107, now seen corresponding path program 1 times [2021-12-22 16:25:14,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:25:14,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299722773] [2021-12-22 16:25:14,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:25:14,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:25:14,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:25:14,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:25:14,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:25:14,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299722773] [2021-12-22 16:25:14,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299722773] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:25:14,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:25:14,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:25:14,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873147303] [2021-12-22 16:25:14,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:25:14,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:25:14,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:25:14,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:25:14,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:25:14,542 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:14,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:14,562 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-12-22 16:25:14,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:25:14,563 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-22 16:25:14,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:14,563 INFO L225 Difference]: With dead ends: 31 [2021-12-22 16:25:14,563 INFO L226 Difference]: Without dead ends: 31 [2021-12-22 16:25:14,563 INFO L932 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 [2021-12-22 16:25:14,564 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 35 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:14,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 31 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:25:14,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-22 16:25:14,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-22 16:25:14,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:14,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-12-22 16:25:14,566 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 14 [2021-12-22 16:25:14,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:14,566 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-12-22 16:25:14,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:14,566 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-12-22 16:25:14,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-22 16:25:14,567 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:14,567 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:25:14,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 16:25:14,567 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-12-22 16:25:14,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:14,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1545170617, now seen corresponding path program 1 times [2021-12-22 16:25:14,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:25:14,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466899673] [2021-12-22 16:25:14,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:25:14,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:25:14,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:25:14,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:25:14,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:25:14,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466899673] [2021-12-22 16:25:14,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466899673] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:25:14,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:25:14,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:25:14,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249112150] [2021-12-22 16:25:14,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:25:14,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:25:14,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:25:14,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:25:14,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:25:14,608 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:14,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:25:14,645 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-12-22 16:25:14,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:25:14,646 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-22 16:25:14,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:25:14,646 INFO L225 Difference]: With dead ends: 30 [2021-12-22 16:25:14,646 INFO L226 Difference]: Without dead ends: 30 [2021-12-22 16:25:14,646 INFO L932 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 [2021-12-22 16:25:14,647 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:25:14,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 30 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:25:14,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-22 16:25:14,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-22 16:25:14,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:14,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-12-22 16:25:14,652 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 15 [2021-12-22 16:25:14,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:25:14,652 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-12-22 16:25:14,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:25:14,653 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-12-22 16:25:14,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-22 16:25:14,653 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:25:14,653 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:25:14,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 16:25:14,654 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-12-22 16:25:14,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:25:14,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1218024458, now seen corresponding path program 1 times [2021-12-22 16:25:14,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:25:14,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389523110] [2021-12-22 16:25:14,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:25:14,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:25:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 16:25:14,665 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 16:25:14,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 16:25:14,681 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 16:25:14,681 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-22 16:25:14,682 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (9 of 10 remaining) [2021-12-22 16:25:14,683 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (8 of 10 remaining) [2021-12-22 16:25:14,684 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (7 of 10 remaining) [2021-12-22 16:25:14,684 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (6 of 10 remaining) [2021-12-22 16:25:14,684 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (5 of 10 remaining) [2021-12-22 16:25:14,684 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (4 of 10 remaining) [2021-12-22 16:25:14,684 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE (3 of 10 remaining) [2021-12-22 16:25:14,684 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE (2 of 10 remaining) [2021-12-22 16:25:14,685 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE (1 of 10 remaining) [2021-12-22 16:25:14,685 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2021-12-22 16:25:14,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 16:25:14,687 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:25:14,690 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-22 16:25:14,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 04:25:14 BoogieIcfgContainer [2021-12-22 16:25:14,706 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-22 16:25:14,707 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-22 16:25:14,707 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-22 16:25:14,707 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-22 16:25:14,707 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:25:12" (3/4) ... [2021-12-22 16:25:14,708 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-22 16:25:14,735 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-22 16:25:14,735 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-22 16:25:14,736 INFO L158 Benchmark]: Toolchain (without parser) took 3204.27ms. Allocated memory was 130.0MB in the beginning and 159.4MB in the end (delta: 29.4MB). Free memory was 93.4MB in the beginning and 70.1MB in the end (delta: 23.2MB). Peak memory consumption was 53.6MB. Max. memory is 16.1GB. [2021-12-22 16:25:14,736 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 130.0MB. Free memory was 103.1MB in the beginning and 103.1MB in the end (delta: 29.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 16:25:14,736 INFO L158 Benchmark]: CACSL2BoogieTranslator took 394.21ms. Allocated memory is still 130.0MB. Free memory was 93.4MB in the beginning and 99.0MB in the end (delta: -5.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-22 16:25:14,736 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.77ms. Allocated memory is still 130.0MB. Free memory was 99.0MB in the beginning and 97.0MB in the end (delta: 2.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-22 16:25:14,737 INFO L158 Benchmark]: Boogie Preprocessor took 38.78ms. Allocated memory is still 130.0MB. Free memory was 97.0MB in the beginning and 96.3MB in the end (delta: 678.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 16:25:14,737 INFO L158 Benchmark]: RCFGBuilder took 263.95ms. Allocated memory is still 130.0MB. Free memory was 95.7MB in the beginning and 84.4MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-22 16:25:14,737 INFO L158 Benchmark]: TraceAbstraction took 2431.60ms. Allocated memory was 130.0MB in the beginning and 159.4MB in the end (delta: 29.4MB). Free memory was 83.8MB in the beginning and 72.2MB in the end (delta: 11.5MB). Peak memory consumption was 41.2MB. Max. memory is 16.1GB. [2021-12-22 16:25:14,738 INFO L158 Benchmark]: Witness Printer took 28.61ms. Allocated memory is still 159.4MB. Free memory was 72.2MB in the beginning and 70.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 16:25:14,739 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 130.0MB. Free memory was 103.1MB in the beginning and 103.1MB in the end (delta: 29.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 394.21ms. Allocated memory is still 130.0MB. Free memory was 93.4MB in the beginning and 99.0MB in the end (delta: -5.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.77ms. Allocated memory is still 130.0MB. Free memory was 99.0MB in the beginning and 97.0MB in the end (delta: 2.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.78ms. Allocated memory is still 130.0MB. Free memory was 97.0MB in the beginning and 96.3MB in the end (delta: 678.6kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 263.95ms. Allocated memory is still 130.0MB. Free memory was 95.7MB in the beginning and 84.4MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 2431.60ms. Allocated memory was 130.0MB in the beginning and 159.4MB in the end (delta: 29.4MB). Free memory was 83.8MB in the beginning and 72.2MB in the end (delta: 11.5MB). Peak memory consumption was 41.2MB. Max. memory is 16.1GB. * Witness Printer took 28.61ms. Allocated memory is still 159.4MB. Free memory was 72.2MB in the beginning and 70.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 532]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L537] CALL, EXPR build_nondet_String() [L515] int length = __VERIFIER_nondet_int(); [L516] COND FALSE !(length < 1) VAL [length=2] [L519] char* nondetString = (char*) malloc(length * sizeof(char)); [L521] int i = 0; VAL [i=0, length=2, nondetString={-1:0}] [L521] COND TRUE i < length - 1 [L523] nondetString[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-2, i=0, length=2, nondetString={-1:0}] [L521] i++ VAL [i=1, length=2, nondetString={-1:0}] [L521] COND FALSE !(i < length - 1) VAL [i=1, length=2, nondetString={-1:0}] [L526] nondetString[length-1] = '\0' VAL [i=1, length=2, nondetString={-1:0}] [L527] return nondetString; VAL [\result={-1:0}, i=1, length=2, nondetString={-1:0}] [L537] RET, EXPR build_nondet_String() [L537] char* p = build_nondet_String(); [L538] CALL cstrlen(p) [L531] const char *p = s; VAL [p={-1:0}, s={-1:0}, s={-1:0}] [L532] EXPR \read(*p) VAL [\read(*p)=-2, p={-1:0}, s={-1:0}, s={-1:0}] [L532] COND TRUE *p != '\0' [L533] p = p+2 VAL [p={-1:2}, s={-1:0}, s={-1:0}] [L532] \read(*p) - UnprovableResult [Line: 523]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 523]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 526]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 526]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 536]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 31 locations, 10 error locations. Started 1 CEGAR loops. OverallTime: 2.4s, OverallIterations: 13, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 711 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 711 mSDsluCounter, 691 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 443 mSDsCounter, 33 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 399 IncrementalHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 33 mSolverCounterUnsat, 248 mSDtfsCounter, 399 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=9, InterpolantAutomatonStates: 65, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 116 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 141 NumberOfCodeBlocks, 141 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 122 ConstructedInterpolants, 0 QuantifiedInterpolants, 730 SizeOfPredicates, 1 NumberOfNonLiveVariables, 45 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 14 InterpolantComputations, 11 PerfectInterpolantSequences, 3/8 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! [2021-12-22 16:25:14,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref)