./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-ext/tree_parent_ptr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f4b24e32 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/memsafety-ext/tree_parent_ptr.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 6e14aa3eeddc5d261248d26114db1375e0f229d6456e2c7754877a082dc10921 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 06:22:34,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 06:22:34,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 06:22:34,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 06:22:34,212 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 06:22:34,213 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 06:22:34,214 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 06:22:34,219 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 06:22:34,220 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 06:22:34,225 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 06:22:34,226 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 06:22:34,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 06:22:34,228 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 06:22:34,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 06:22:34,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 06:22:34,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 06:22:34,235 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 06:22:34,236 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 06:22:34,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 06:22:34,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 06:22:34,243 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 06:22:34,243 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 06:22:34,244 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 06:22:34,245 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 06:22:34,246 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 06:22:34,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 06:22:34,250 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 06:22:34,250 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 06:22:34,251 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 06:22:34,252 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 06:22:34,252 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 06:22:34,253 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 06:22:34,254 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 06:22:34,254 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 06:22:34,255 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 06:22:34,255 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 06:22:34,255 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 06:22:34,256 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 06:22:34,256 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 06:22:34,256 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 06:22:34,257 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 06:22:34,258 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 06:22:34,259 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-14 06:22:34,287 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 06:22:34,288 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 06:22:34,288 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 06:22:34,288 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 06:22:34,289 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 06:22:34,289 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 06:22:34,289 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 06:22:34,289 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 06:22:34,289 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 06:22:34,290 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 06:22:34,290 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 06:22:34,291 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 06:22:34,291 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 06:22:34,291 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 06:22:34,291 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 06:22:34,291 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 06:22:34,291 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 06:22:34,292 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 06:22:34,292 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 06:22:34,293 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 06:22:34,293 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 06:22:34,293 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 06:22:34,294 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 06:22:34,294 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 06:22:34,294 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 06:22:34,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:22:34,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 06:22:34,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 06:22:34,295 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 06:22:34,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-14 06:22:34,295 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e14aa3eeddc5d261248d26114db1375e0f229d6456e2c7754877a082dc10921 [2022-07-14 06:22:34,454 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 06:22:34,478 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 06:22:34,480 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 06:22:34,481 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 06:22:34,482 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 06:22:34,482 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext/tree_parent_ptr.i [2022-07-14 06:22:34,543 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abb512641/43bb4c8235a64bce9eb1d3596551362a/FLAG79b36c7c8 [2022-07-14 06:22:34,939 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 06:22:34,940 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext/tree_parent_ptr.i [2022-07-14 06:22:34,949 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abb512641/43bb4c8235a64bce9eb1d3596551362a/FLAG79b36c7c8 [2022-07-14 06:22:34,958 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abb512641/43bb4c8235a64bce9eb1d3596551362a [2022-07-14 06:22:34,959 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 06:22:34,960 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 06:22:34,961 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 06:22:34,961 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 06:22:34,964 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 06:22:34,964 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:22:34" (1/1) ... [2022-07-14 06:22:34,965 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43f28931 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:22:34, skipping insertion in model container [2022-07-14 06:22:34,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:22:34" (1/1) ... [2022-07-14 06:22:34,969 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 06:22:35,004 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:22:35,201 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:22:35,213 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 06:22:35,248 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:22:35,274 INFO L208 MainTranslator]: Completed translation [2022-07-14 06:22:35,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:22:35 WrapperNode [2022-07-14 06:22:35,274 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 06:22:35,275 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 06:22:35,275 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 06:22:35,275 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 06:22:35,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:22:35" (1/1) ... [2022-07-14 06:22:35,306 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:22:35" (1/1) ... [2022-07-14 06:22:35,326 INFO L137 Inliner]: procedures = 123, calls = 49, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 149 [2022-07-14 06:22:35,326 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 06:22:35,327 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 06:22:35,327 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 06:22:35,327 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 06:22:35,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:22:35" (1/1) ... [2022-07-14 06:22:35,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:22:35" (1/1) ... [2022-07-14 06:22:35,336 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:22:35" (1/1) ... [2022-07-14 06:22:35,336 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:22:35" (1/1) ... [2022-07-14 06:22:35,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:22:35" (1/1) ... [2022-07-14 06:22:35,348 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:22:35" (1/1) ... [2022-07-14 06:22:35,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:22:35" (1/1) ... [2022-07-14 06:22:35,350 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 06:22:35,351 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 06:22:35,351 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 06:22:35,351 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 06:22:35,358 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:22:35" (1/1) ... [2022-07-14 06:22:35,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:22:35,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:22:35,381 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) [2022-07-14 06:22:35,383 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 [2022-07-14 06:22:35,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-14 06:22:35,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-14 06:22:35,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-14 06:22:35,409 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-14 06:22:35,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 06:22:35,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-14 06:22:35,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 06:22:35,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 06:22:35,484 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 06:22:35,485 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 06:22:35,904 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 06:22:35,910 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 06:22:35,910 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-14 06:22:35,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:22:35 BoogieIcfgContainer [2022-07-14 06:22:35,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 06:22:35,915 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 06:22:35,915 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 06:22:35,918 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 06:22:35,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 06:22:34" (1/3) ... [2022-07-14 06:22:35,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@115054ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:22:35, skipping insertion in model container [2022-07-14 06:22:35,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:22:35" (2/3) ... [2022-07-14 06:22:35,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@115054ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:22:35, skipping insertion in model container [2022-07-14 06:22:35,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:22:35" (3/3) ... [2022-07-14 06:22:35,921 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_parent_ptr.i [2022-07-14 06:22:35,936 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 06:22:35,937 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 77 error locations. [2022-07-14 06:22:35,982 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 06:22:35,989 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6b119990, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1ad0738c [2022-07-14 06:22:35,989 INFO L358 AbstractCegarLoop]: Starting to check reachability of 77 error locations. [2022-07-14 06:22:35,994 INFO L276 IsEmpty]: Start isEmpty. Operand has 155 states, 77 states have (on average 2.1818181818181817) internal successors, (168), 154 states have internal predecessors, (168), 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) [2022-07-14 06:22:35,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-14 06:22:36,000 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:36,000 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-14 06:22:36,001 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:36,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:36,005 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2022-07-14 06:22:36,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:36,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209425517] [2022-07-14 06:22:36,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:36,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:36,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:36,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:36,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:36,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209425517] [2022-07-14 06:22:36,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209425517] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:22:36,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:22:36,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:22:36,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029824572] [2022-07-14 06:22:36,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:22:36,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:22:36,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:22:36,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:22:36,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:22:36,190 INFO L87 Difference]: Start difference. First operand has 155 states, 77 states have (on average 2.1818181818181817) internal successors, (168), 154 states have internal predecessors, (168), 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 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2022-07-14 06:22:36,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:22:36,352 INFO L93 Difference]: Finished difference Result 172 states and 182 transitions. [2022-07-14 06:22:36,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:22:36,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2022-07-14 06:22:36,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:22:36,365 INFO L225 Difference]: With dead ends: 172 [2022-07-14 06:22:36,366 INFO L226 Difference]: Without dead ends: 168 [2022-07-14 06:22:36,368 INFO L412 NwaCegarLoop]: 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 [2022-07-14 06:22:36,371 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 120 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:22:36,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 128 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:22:36,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-14 06:22:36,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 150. [2022-07-14 06:22:36,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 149 states have internal predecessors, (160), 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) [2022-07-14 06:22:36,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 160 transitions. [2022-07-14 06:22:36,420 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 160 transitions. Word has length 3 [2022-07-14 06:22:36,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:22:36,421 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 160 transitions. [2022-07-14 06:22:36,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2022-07-14 06:22:36,421 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 160 transitions. [2022-07-14 06:22:36,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-14 06:22:36,426 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:36,426 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-14 06:22:36,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-14 06:22:36,428 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:36,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:36,428 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2022-07-14 06:22:36,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:36,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077047160] [2022-07-14 06:22:36,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:36,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:36,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:36,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:36,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:36,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077047160] [2022-07-14 06:22:36,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077047160] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:22:36,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:22:36,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:22:36,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83284300] [2022-07-14 06:22:36,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:22:36,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:22:36,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:22:36,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:22:36,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:22:36,494 INFO L87 Difference]: Start difference. First operand 150 states and 160 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2022-07-14 06:22:36,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:22:36,584 INFO L93 Difference]: Finished difference Result 147 states and 157 transitions. [2022-07-14 06:22:36,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:22:36,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2022-07-14 06:22:36,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:22:36,587 INFO L225 Difference]: With dead ends: 147 [2022-07-14 06:22:36,587 INFO L226 Difference]: Without dead ends: 147 [2022-07-14 06:22:36,590 INFO L412 NwaCegarLoop]: 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 [2022-07-14 06:22:36,592 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 92 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:22:36,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 144 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:22:36,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-07-14 06:22:36,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-07-14 06:22:36,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 146 states have internal predecessors, (157), 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) [2022-07-14 06:22:36,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 157 transitions. [2022-07-14 06:22:36,608 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 157 transitions. Word has length 3 [2022-07-14 06:22:36,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:22:36,609 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 157 transitions. [2022-07-14 06:22:36,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2022-07-14 06:22:36,609 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 157 transitions. [2022-07-14 06:22:36,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-14 06:22:36,609 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:36,610 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:22:36,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-14 06:22:36,612 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:36,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:36,613 INFO L85 PathProgramCache]: Analyzing trace with hash 59265651, now seen corresponding path program 1 times [2022-07-14 06:22:36,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:36,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841079644] [2022-07-14 06:22:36,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:36,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:36,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:36,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:36,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:36,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841079644] [2022-07-14 06:22:36,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841079644] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:22:36,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:22:36,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:22:36,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717263057] [2022-07-14 06:22:36,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:22:36,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:22:36,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:22:36,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:22:36,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:22:36,656 INFO L87 Difference]: Start difference. First operand 147 states and 157 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-07-14 06:22:36,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:22:36,791 INFO L93 Difference]: Finished difference Result 153 states and 164 transitions. [2022-07-14 06:22:36,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:22:36,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2022-07-14 06:22:36,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:22:36,793 INFO L225 Difference]: With dead ends: 153 [2022-07-14 06:22:36,793 INFO L226 Difference]: Without dead ends: 153 [2022-07-14 06:22:36,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:22:36,798 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 198 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:22:36,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 100 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:22:36,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-14 06:22:36,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 131. [2022-07-14 06:22:36,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 77 states have (on average 1.844155844155844) internal successors, (142), 130 states have internal predecessors, (142), 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) [2022-07-14 06:22:36,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 142 transitions. [2022-07-14 06:22:36,802 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 142 transitions. Word has length 8 [2022-07-14 06:22:36,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:22:36,803 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 142 transitions. [2022-07-14 06:22:36,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-07-14 06:22:36,803 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 142 transitions. [2022-07-14 06:22:36,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-14 06:22:36,803 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:36,803 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:22:36,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-14 06:22:36,804 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:36,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:36,804 INFO L85 PathProgramCache]: Analyzing trace with hash 59265652, now seen corresponding path program 1 times [2022-07-14 06:22:36,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:36,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185409] [2022-07-14 06:22:36,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:36,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:36,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:36,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:36,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:36,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185409] [2022-07-14 06:22:36,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185409] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:22:36,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:22:36,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:22:36,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950014424] [2022-07-14 06:22:36,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:22:36,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:22:36,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:22:36,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:22:36,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:22:36,875 INFO L87 Difference]: Start difference. First operand 131 states and 142 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-07-14 06:22:37,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:22:37,016 INFO L93 Difference]: Finished difference Result 186 states and 204 transitions. [2022-07-14 06:22:37,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:22:37,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2022-07-14 06:22:37,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:22:37,019 INFO L225 Difference]: With dead ends: 186 [2022-07-14 06:22:37,019 INFO L226 Difference]: Without dead ends: 186 [2022-07-14 06:22:37,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:22:37,020 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 191 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:22:37,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 180 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:22:37,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-07-14 06:22:37,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 167. [2022-07-14 06:22:37,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 113 states have (on average 1.7168141592920354) internal successors, (194), 166 states have internal predecessors, (194), 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) [2022-07-14 06:22:37,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 194 transitions. [2022-07-14 06:22:37,029 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 194 transitions. Word has length 8 [2022-07-14 06:22:37,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:22:37,030 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 194 transitions. [2022-07-14 06:22:37,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-07-14 06:22:37,030 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 194 transitions. [2022-07-14 06:22:37,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-14 06:22:37,030 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:37,030 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:22:37,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-14 06:22:37,031 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:37,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:37,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1837237128, now seen corresponding path program 1 times [2022-07-14 06:22:37,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:37,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113742076] [2022-07-14 06:22:37,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:37,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:37,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:37,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:37,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:37,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113742076] [2022-07-14 06:22:37,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113742076] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:22:37,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:22:37,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:22:37,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336362089] [2022-07-14 06:22:37,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:22:37,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:22:37,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:22:37,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:22:37,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:22:37,093 INFO L87 Difference]: Start difference. First operand 167 states and 194 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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) [2022-07-14 06:22:37,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:22:37,161 INFO L93 Difference]: Finished difference Result 171 states and 198 transitions. [2022-07-14 06:22:37,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:22:37,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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 [2022-07-14 06:22:37,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:22:37,163 INFO L225 Difference]: With dead ends: 171 [2022-07-14 06:22:37,163 INFO L226 Difference]: Without dead ends: 171 [2022-07-14 06:22:37,163 INFO L412 NwaCegarLoop]: 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 [2022-07-14 06:22:37,164 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 10 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:22:37,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 199 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:22:37,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-07-14 06:22:37,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2022-07-14 06:22:37,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 115 states have (on average 1.7043478260869565) internal successors, (196), 166 states have internal predecessors, (196), 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) [2022-07-14 06:22:37,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 196 transitions. [2022-07-14 06:22:37,167 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 196 transitions. Word has length 9 [2022-07-14 06:22:37,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:22:37,167 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 196 transitions. [2022-07-14 06:22:37,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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) [2022-07-14 06:22:37,168 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 196 transitions. [2022-07-14 06:22:37,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-14 06:22:37,168 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:37,168 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:22:37,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-14 06:22:37,169 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:37,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:37,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1837237129, now seen corresponding path program 1 times [2022-07-14 06:22:37,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:37,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229591842] [2022-07-14 06:22:37,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:37,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:37,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:37,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:37,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:37,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229591842] [2022-07-14 06:22:37,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229591842] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:22:37,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:22:37,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:22:37,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562630128] [2022-07-14 06:22:37,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:22:37,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:22:37,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:22:37,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:22:37,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:22:37,222 INFO L87 Difference]: Start difference. First operand 167 states and 196 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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) [2022-07-14 06:22:37,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:22:37,298 INFO L93 Difference]: Finished difference Result 169 states and 196 transitions. [2022-07-14 06:22:37,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:22:37,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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 [2022-07-14 06:22:37,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:22:37,299 INFO L225 Difference]: With dead ends: 169 [2022-07-14 06:22:37,299 INFO L226 Difference]: Without dead ends: 169 [2022-07-14 06:22:37,299 INFO L412 NwaCegarLoop]: 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 [2022-07-14 06:22:37,300 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 7 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:22:37,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 189 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:22:37,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-14 06:22:37,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 165. [2022-07-14 06:22:37,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 115 states have (on average 1.6782608695652175) internal successors, (193), 164 states have internal predecessors, (193), 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) [2022-07-14 06:22:37,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 193 transitions. [2022-07-14 06:22:37,302 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 193 transitions. Word has length 9 [2022-07-14 06:22:37,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:22:37,302 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 193 transitions. [2022-07-14 06:22:37,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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) [2022-07-14 06:22:37,303 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 193 transitions. [2022-07-14 06:22:37,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-14 06:22:37,303 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:37,303 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:22:37,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-14 06:22:37,303 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr76ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:37,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:37,304 INFO L85 PathProgramCache]: Analyzing trace with hash 243138738, now seen corresponding path program 1 times [2022-07-14 06:22:37,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:37,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910462732] [2022-07-14 06:22:37,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:37,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:37,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:37,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:37,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:37,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910462732] [2022-07-14 06:22:37,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910462732] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:22:37,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:22:37,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:22:37,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769043126] [2022-07-14 06:22:37,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:22:37,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:22:37,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:22:37,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:22:37,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:22:37,343 INFO L87 Difference]: Start difference. First operand 165 states and 193 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2022-07-14 06:22:37,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:22:37,355 INFO L93 Difference]: Finished difference Result 166 states and 193 transitions. [2022-07-14 06:22:37,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:22:37,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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 [2022-07-14 06:22:37,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:22:37,356 INFO L225 Difference]: With dead ends: 166 [2022-07-14 06:22:37,356 INFO L226 Difference]: Without dead ends: 166 [2022-07-14 06:22:37,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:22:37,358 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 2 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:22:37,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 254 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:22:37,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-07-14 06:22:37,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2022-07-14 06:22:37,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 115 states have (on average 1.6695652173913043) internal successors, (192), 164 states have internal predecessors, (192), 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) [2022-07-14 06:22:37,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 192 transitions. [2022-07-14 06:22:37,362 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 192 transitions. Word has length 13 [2022-07-14 06:22:37,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:22:37,362 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 192 transitions. [2022-07-14 06:22:37,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2022-07-14 06:22:37,362 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 192 transitions. [2022-07-14 06:22:37,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-14 06:22:37,362 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:37,362 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:22:37,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-14 06:22:37,363 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:37,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:37,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1052634445, now seen corresponding path program 1 times [2022-07-14 06:22:37,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:37,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148381929] [2022-07-14 06:22:37,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:37,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:37,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:37,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:37,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148381929] [2022-07-14 06:22:37,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148381929] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:22:37,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:22:37,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:22:37,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284754800] [2022-07-14 06:22:37,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:22:37,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:22:37,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:22:37,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:22:37,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:22:37,418 INFO L87 Difference]: Start difference. First operand 165 states and 192 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) [2022-07-14 06:22:37,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:22:37,532 INFO L93 Difference]: Finished difference Result 178 states and 206 transitions. [2022-07-14 06:22:37,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:22:37,533 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 [2022-07-14 06:22:37,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:22:37,534 INFO L225 Difference]: With dead ends: 178 [2022-07-14 06:22:37,534 INFO L226 Difference]: Without dead ends: 178 [2022-07-14 06:22:37,534 INFO L412 NwaCegarLoop]: 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 [2022-07-14 06:22:37,534 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 34 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:22:37,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 304 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:22:37,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-07-14 06:22:37,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 162. [2022-07-14 06:22:37,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 117 states have (on average 1.623931623931624) internal successors, (190), 161 states have internal predecessors, (190), 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) [2022-07-14 06:22:37,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 190 transitions. [2022-07-14 06:22:37,537 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 190 transitions. Word has length 14 [2022-07-14 06:22:37,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:22:37,537 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 190 transitions. [2022-07-14 06:22:37,538 INFO L496 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) [2022-07-14 06:22:37,538 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 190 transitions. [2022-07-14 06:22:37,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-14 06:22:37,538 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:37,538 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:22:37,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-14 06:22:37,539 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:37,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:37,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1052634444, now seen corresponding path program 1 times [2022-07-14 06:22:37,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:37,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67066589] [2022-07-14 06:22:37,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:37,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:37,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:37,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:37,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:37,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67066589] [2022-07-14 06:22:37,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67066589] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:22:37,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:22:37,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:22:37,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917487119] [2022-07-14 06:22:37,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:22:37,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:22:37,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:22:37,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:22:37,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:22:37,651 INFO L87 Difference]: Start difference. First operand 162 states and 190 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 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) [2022-07-14 06:22:37,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:22:37,865 INFO L93 Difference]: Finished difference Result 201 states and 231 transitions. [2022-07-14 06:22:37,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:22:37,866 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 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 [2022-07-14 06:22:37,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:22:37,867 INFO L225 Difference]: With dead ends: 201 [2022-07-14 06:22:37,867 INFO L226 Difference]: Without dead ends: 201 [2022-07-14 06:22:37,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:22:37,867 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 54 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:22:37,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 352 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:22:37,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-07-14 06:22:37,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 169. [2022-07-14 06:22:37,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 128 states have (on average 1.5859375) internal successors, (203), 168 states have internal predecessors, (203), 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) [2022-07-14 06:22:37,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 203 transitions. [2022-07-14 06:22:37,870 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 203 transitions. Word has length 14 [2022-07-14 06:22:37,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:22:37,870 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 203 transitions. [2022-07-14 06:22:37,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 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) [2022-07-14 06:22:37,870 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 203 transitions. [2022-07-14 06:22:37,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-14 06:22:37,871 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:37,871 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:22:37,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-14 06:22:37,871 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:37,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:37,872 INFO L85 PathProgramCache]: Analyzing trace with hash 395262676, now seen corresponding path program 1 times [2022-07-14 06:22:37,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:37,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794035687] [2022-07-14 06:22:37,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:37,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:37,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:37,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:37,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:37,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794035687] [2022-07-14 06:22:37,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794035687] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:22:37,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:22:37,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:22:37,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700780388] [2022-07-14 06:22:37,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:22:37,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:22:37,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:22:37,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:22:37,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:22:37,911 INFO L87 Difference]: Start difference. First operand 169 states and 203 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-07-14 06:22:37,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:22:37,917 INFO L93 Difference]: Finished difference Result 171 states and 205 transitions. [2022-07-14 06:22:37,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:22:37,917 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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 [2022-07-14 06:22:37,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:22:37,918 INFO L225 Difference]: With dead ends: 171 [2022-07-14 06:22:37,918 INFO L226 Difference]: Without dead ends: 171 [2022-07-14 06:22:37,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:22:37,919 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 0 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:22:37,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 246 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:22:37,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-07-14 06:22:37,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-07-14 06:22:37,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 130 states have (on average 1.5769230769230769) internal successors, (205), 170 states have internal predecessors, (205), 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) [2022-07-14 06:22:37,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 205 transitions. [2022-07-14 06:22:37,925 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 205 transitions. Word has length 15 [2022-07-14 06:22:37,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:22:37,925 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 205 transitions. [2022-07-14 06:22:37,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-07-14 06:22:37,925 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 205 transitions. [2022-07-14 06:22:37,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-14 06:22:37,927 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:37,927 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:22:37,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-14 06:22:37,927 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:37,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:37,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1476383815, now seen corresponding path program 1 times [2022-07-14 06:22:37,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:37,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457633864] [2022-07-14 06:22:37,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:37,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:37,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:37,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:37,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:37,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457633864] [2022-07-14 06:22:37,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457633864] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:22:37,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:22:37,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:22:37,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442610133] [2022-07-14 06:22:37,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:22:37,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:22:37,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:22:37,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:22:37,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:22:38,000 INFO L87 Difference]: Start difference. First operand 171 states and 205 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 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) [2022-07-14 06:22:38,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:22:38,060 INFO L93 Difference]: Finished difference Result 185 states and 213 transitions. [2022-07-14 06:22:38,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:22:38,061 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 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 17 [2022-07-14 06:22:38,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:22:38,064 INFO L225 Difference]: With dead ends: 185 [2022-07-14 06:22:38,064 INFO L226 Difference]: Without dead ends: 185 [2022-07-14 06:22:38,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:22:38,065 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 60 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:22:38,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 309 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:22:38,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-14 06:22:38,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 172. [2022-07-14 06:22:38,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 131 states have (on average 1.5725190839694656) internal successors, (206), 171 states have internal predecessors, (206), 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) [2022-07-14 06:22:38,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 206 transitions. [2022-07-14 06:22:38,074 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 206 transitions. Word has length 17 [2022-07-14 06:22:38,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:22:38,074 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 206 transitions. [2022-07-14 06:22:38,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 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) [2022-07-14 06:22:38,074 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 206 transitions. [2022-07-14 06:22:38,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-14 06:22:38,077 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:38,077 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:22:38,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-14 06:22:38,077 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:38,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:38,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1645245929, now seen corresponding path program 1 times [2022-07-14 06:22:38,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:38,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268303435] [2022-07-14 06:22:38,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:38,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:38,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:38,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:38,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:38,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268303435] [2022-07-14 06:22:38,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268303435] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:22:38,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:22:38,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:22:38,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497346349] [2022-07-14 06:22:38,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:22:38,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:22:38,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:22:38,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:22:38,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:22:38,161 INFO L87 Difference]: Start difference. First operand 172 states and 206 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 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) [2022-07-14 06:22:38,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:22:38,295 INFO L93 Difference]: Finished difference Result 209 states and 249 transitions. [2022-07-14 06:22:38,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:22:38,295 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 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 17 [2022-07-14 06:22:38,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:22:38,296 INFO L225 Difference]: With dead ends: 209 [2022-07-14 06:22:38,296 INFO L226 Difference]: Without dead ends: 209 [2022-07-14 06:22:38,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:22:38,296 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 50 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:22:38,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 477 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:22:38,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-07-14 06:22:38,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 186. [2022-07-14 06:22:38,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 145 states have (on average 1.5517241379310345) internal successors, (225), 185 states have internal predecessors, (225), 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) [2022-07-14 06:22:38,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 225 transitions. [2022-07-14 06:22:38,299 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 225 transitions. Word has length 17 [2022-07-14 06:22:38,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:22:38,299 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 225 transitions. [2022-07-14 06:22:38,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 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) [2022-07-14 06:22:38,299 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 225 transitions. [2022-07-14 06:22:38,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-14 06:22:38,299 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:38,299 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:22:38,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-14 06:22:38,299 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr57REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:38,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:38,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1465631940, now seen corresponding path program 1 times [2022-07-14 06:22:38,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:38,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364635858] [2022-07-14 06:22:38,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:38,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:38,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:38,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:38,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:38,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364635858] [2022-07-14 06:22:38,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364635858] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:22:38,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:22:38,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-14 06:22:38,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479285167] [2022-07-14 06:22:38,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:22:38,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-14 06:22:38,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:22:38,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-14 06:22:38,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:22:38,431 INFO L87 Difference]: Start difference. First operand 186 states and 225 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 11 states have internal predecessors, (19), 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) [2022-07-14 06:22:38,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:22:38,844 INFO L93 Difference]: Finished difference Result 207 states and 246 transitions. [2022-07-14 06:22:38,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-14 06:22:38,844 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 11 states have internal predecessors, (19), 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 19 [2022-07-14 06:22:38,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:22:38,845 INFO L225 Difference]: With dead ends: 207 [2022-07-14 06:22:38,845 INFO L226 Difference]: Without dead ends: 207 [2022-07-14 06:22:38,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-07-14 06:22:38,845 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 207 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:22:38,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 390 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:22:38,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-07-14 06:22:38,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 191. [2022-07-14 06:22:38,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 150 states have (on average 1.54) internal successors, (231), 190 states have internal predecessors, (231), 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) [2022-07-14 06:22:38,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 231 transitions. [2022-07-14 06:22:38,848 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 231 transitions. Word has length 19 [2022-07-14 06:22:38,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:22:38,848 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 231 transitions. [2022-07-14 06:22:38,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 11 states have internal predecessors, (19), 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) [2022-07-14 06:22:38,848 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 231 transitions. [2022-07-14 06:22:38,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-14 06:22:38,849 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:38,849 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:22:38,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-14 06:22:38,849 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr58REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:38,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:38,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1465631939, now seen corresponding path program 1 times [2022-07-14 06:22:38,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:38,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079275089] [2022-07-14 06:22:38,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:38,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:38,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:38,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:38,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079275089] [2022-07-14 06:22:38,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079275089] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:22:38,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:22:38,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-14 06:22:38,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755621256] [2022-07-14 06:22:38,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:22:38,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-14 06:22:38,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:22:38,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-14 06:22:38,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:22:38,983 INFO L87 Difference]: Start difference. First operand 191 states and 231 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 11 states have internal predecessors, (19), 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) [2022-07-14 06:22:39,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:22:39,504 INFO L93 Difference]: Finished difference Result 260 states and 295 transitions. [2022-07-14 06:22:39,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-14 06:22:39,504 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 11 states have internal predecessors, (19), 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 19 [2022-07-14 06:22:39,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:22:39,505 INFO L225 Difference]: With dead ends: 260 [2022-07-14 06:22:39,506 INFO L226 Difference]: Without dead ends: 260 [2022-07-14 06:22:39,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2022-07-14 06:22:39,506 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 295 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:22:39,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 368 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 06:22:39,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-07-14 06:22:39,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 195. [2022-07-14 06:22:39,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 154 states have (on average 1.5324675324675325) internal successors, (236), 194 states have internal predecessors, (236), 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) [2022-07-14 06:22:39,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 236 transitions. [2022-07-14 06:22:39,510 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 236 transitions. Word has length 19 [2022-07-14 06:22:39,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:22:39,510 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 236 transitions. [2022-07-14 06:22:39,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 11 states have internal predecessors, (19), 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) [2022-07-14 06:22:39,510 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 236 transitions. [2022-07-14 06:22:39,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-14 06:22:39,511 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:39,511 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:22:39,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-14 06:22:39,511 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:39,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:39,512 INFO L85 PathProgramCache]: Analyzing trace with hash -825042817, now seen corresponding path program 1 times [2022-07-14 06:22:39,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:39,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143002083] [2022-07-14 06:22:39,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:39,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:39,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:39,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:39,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:39,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143002083] [2022-07-14 06:22:39,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143002083] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:22:39,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:22:39,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:22:39,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437395251] [2022-07-14 06:22:39,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:22:39,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:22:39,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:22:39,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:22:39,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:22:39,545 INFO L87 Difference]: Start difference. First operand 195 states and 236 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 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) [2022-07-14 06:22:39,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:22:39,678 INFO L93 Difference]: Finished difference Result 194 states and 234 transitions. [2022-07-14 06:22:39,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:22:39,679 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 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 19 [2022-07-14 06:22:39,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:22:39,680 INFO L225 Difference]: With dead ends: 194 [2022-07-14 06:22:39,680 INFO L226 Difference]: Without dead ends: 194 [2022-07-14 06:22:39,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:22:39,680 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 6 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:22:39,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 302 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:22:39,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-07-14 06:22:39,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2022-07-14 06:22:39,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 154 states have (on average 1.5194805194805194) internal successors, (234), 193 states have internal predecessors, (234), 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) [2022-07-14 06:22:39,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 234 transitions. [2022-07-14 06:22:39,684 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 234 transitions. Word has length 19 [2022-07-14 06:22:39,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:22:39,684 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 234 transitions. [2022-07-14 06:22:39,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 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) [2022-07-14 06:22:39,684 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 234 transitions. [2022-07-14 06:22:39,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-14 06:22:39,684 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:39,684 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:22:39,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-14 06:22:39,685 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:39,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:39,685 INFO L85 PathProgramCache]: Analyzing trace with hash -825042816, now seen corresponding path program 1 times [2022-07-14 06:22:39,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:39,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82670546] [2022-07-14 06:22:39,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:39,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:39,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:39,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:39,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82670546] [2022-07-14 06:22:39,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82670546] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:22:39,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:22:39,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:22:39,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369845473] [2022-07-14 06:22:39,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:22:39,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:22:39,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:22:39,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:22:39,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:22:39,728 INFO L87 Difference]: Start difference. First operand 194 states and 234 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 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) [2022-07-14 06:22:39,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:22:39,866 INFO L93 Difference]: Finished difference Result 193 states and 232 transitions. [2022-07-14 06:22:39,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:22:39,866 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 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 19 [2022-07-14 06:22:39,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:22:39,867 INFO L225 Difference]: With dead ends: 193 [2022-07-14 06:22:39,867 INFO L226 Difference]: Without dead ends: 193 [2022-07-14 06:22:39,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:22:39,868 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 4 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:22:39,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 280 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:22:39,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-07-14 06:22:39,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2022-07-14 06:22:39,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 154 states have (on average 1.5064935064935066) internal successors, (232), 192 states have internal predecessors, (232), 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) [2022-07-14 06:22:39,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 232 transitions. [2022-07-14 06:22:39,872 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 232 transitions. Word has length 19 [2022-07-14 06:22:39,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:22:39,872 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 232 transitions. [2022-07-14 06:22:39,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 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) [2022-07-14 06:22:39,872 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 232 transitions. [2022-07-14 06:22:39,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-14 06:22:39,873 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:39,873 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:22:39,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-14 06:22:39,873 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:39,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:39,874 INFO L85 PathProgramCache]: Analyzing trace with hash -3442432, now seen corresponding path program 1 times [2022-07-14 06:22:39,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:39,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525644041] [2022-07-14 06:22:39,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:39,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:39,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:39,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:39,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:39,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525644041] [2022-07-14 06:22:39,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525644041] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:22:39,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:22:39,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:22:39,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720749279] [2022-07-14 06:22:39,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:22:39,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:22:39,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:22:39,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:22:39,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:22:39,916 INFO L87 Difference]: Start difference. First operand 193 states and 232 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 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) [2022-07-14 06:22:40,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:22:40,008 INFO L93 Difference]: Finished difference Result 189 states and 229 transitions. [2022-07-14 06:22:40,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:22:40,008 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 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 22 [2022-07-14 06:22:40,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:22:40,009 INFO L225 Difference]: With dead ends: 189 [2022-07-14 06:22:40,009 INFO L226 Difference]: Without dead ends: 189 [2022-07-14 06:22:40,009 INFO L412 NwaCegarLoop]: 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 [2022-07-14 06:22:40,011 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 168 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:22:40,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 81 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:22:40,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-07-14 06:22:40,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 185. [2022-07-14 06:22:40,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 153 states have (on average 1.4640522875816993) internal successors, (224), 184 states have internal predecessors, (224), 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) [2022-07-14 06:22:40,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 224 transitions. [2022-07-14 06:22:40,015 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 224 transitions. Word has length 22 [2022-07-14 06:22:40,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:22:40,015 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 224 transitions. [2022-07-14 06:22:40,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 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) [2022-07-14 06:22:40,015 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 224 transitions. [2022-07-14 06:22:40,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-14 06:22:40,016 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:40,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:22:40,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-14 06:22:40,016 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:40,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:40,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1247328411, now seen corresponding path program 1 times [2022-07-14 06:22:40,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:40,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651757757] [2022-07-14 06:22:40,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:40,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:40,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:40,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:40,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:40,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651757757] [2022-07-14 06:22:40,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651757757] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:22:40,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:22:40,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-14 06:22:40,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322310764] [2022-07-14 06:22:40,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:22:40,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 06:22:40,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:22:40,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 06:22:40,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:22:40,097 INFO L87 Difference]: Start difference. First operand 185 states and 224 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 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) [2022-07-14 06:22:40,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:22:40,333 INFO L93 Difference]: Finished difference Result 187 states and 226 transitions. [2022-07-14 06:22:40,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-14 06:22:40,334 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 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 22 [2022-07-14 06:22:40,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:22:40,335 INFO L225 Difference]: With dead ends: 187 [2022-07-14 06:22:40,335 INFO L226 Difference]: Without dead ends: 187 [2022-07-14 06:22:40,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-07-14 06:22:40,336 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 154 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:22:40,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 234 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:22:40,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-07-14 06:22:40,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 184. [2022-07-14 06:22:40,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 153 states have (on average 1.4509803921568627) internal successors, (222), 183 states have internal predecessors, (222), 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) [2022-07-14 06:22:40,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 222 transitions. [2022-07-14 06:22:40,340 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 222 transitions. Word has length 22 [2022-07-14 06:22:40,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:22:40,340 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 222 transitions. [2022-07-14 06:22:40,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 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) [2022-07-14 06:22:40,341 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 222 transitions. [2022-07-14 06:22:40,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-14 06:22:40,341 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:40,341 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:22:40,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-14 06:22:40,342 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:40,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:40,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1247328412, now seen corresponding path program 1 times [2022-07-14 06:22:40,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:40,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471427871] [2022-07-14 06:22:40,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:40,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:40,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:40,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:40,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471427871] [2022-07-14 06:22:40,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471427871] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:22:40,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:22:40,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-14 06:22:40,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922523168] [2022-07-14 06:22:40,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:22:40,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 06:22:40,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:22:40,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 06:22:40,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:22:40,415 INFO L87 Difference]: Start difference. First operand 184 states and 222 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 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) [2022-07-14 06:22:40,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:22:40,709 INFO L93 Difference]: Finished difference Result 186 states and 224 transitions. [2022-07-14 06:22:40,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-14 06:22:40,710 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 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 22 [2022-07-14 06:22:40,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:22:40,710 INFO L225 Difference]: With dead ends: 186 [2022-07-14 06:22:40,710 INFO L226 Difference]: Without dead ends: 186 [2022-07-14 06:22:40,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-07-14 06:22:40,711 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 147 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:22:40,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 306 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:22:40,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-07-14 06:22:40,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 183. [2022-07-14 06:22:40,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 153 states have (on average 1.4379084967320261) internal successors, (220), 182 states have internal predecessors, (220), 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) [2022-07-14 06:22:40,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 220 transitions. [2022-07-14 06:22:40,716 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 220 transitions. Word has length 22 [2022-07-14 06:22:40,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:22:40,716 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 220 transitions. [2022-07-14 06:22:40,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 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) [2022-07-14 06:22:40,716 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 220 transitions. [2022-07-14 06:22:40,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-14 06:22:40,717 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:40,717 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:22:40,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-14 06:22:40,717 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:40,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:40,718 INFO L85 PathProgramCache]: Analyzing trace with hash -19499741, now seen corresponding path program 1 times [2022-07-14 06:22:40,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:40,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745484346] [2022-07-14 06:22:40,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:40,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:40,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:40,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:40,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:40,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745484346] [2022-07-14 06:22:40,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745484346] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:22:40,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:22:40,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:22:40,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300516572] [2022-07-14 06:22:40,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:22:40,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:22:40,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:22:40,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:22:40,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:22:40,753 INFO L87 Difference]: Start difference. First operand 183 states and 220 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 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) [2022-07-14 06:22:40,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:22:40,847 INFO L93 Difference]: Finished difference Result 182 states and 218 transitions. [2022-07-14 06:22:40,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:22:40,848 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 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 23 [2022-07-14 06:22:40,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:22:40,848 INFO L225 Difference]: With dead ends: 182 [2022-07-14 06:22:40,848 INFO L226 Difference]: Without dead ends: 182 [2022-07-14 06:22:40,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:22:40,849 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 6 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:22:40,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 271 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:22:40,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-07-14 06:22:40,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2022-07-14 06:22:40,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 153 states have (on average 1.4248366013071896) internal successors, (218), 181 states have internal predecessors, (218), 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) [2022-07-14 06:22:40,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 218 transitions. [2022-07-14 06:22:40,852 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 218 transitions. Word has length 23 [2022-07-14 06:22:40,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:22:40,852 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 218 transitions. [2022-07-14 06:22:40,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 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) [2022-07-14 06:22:40,852 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 218 transitions. [2022-07-14 06:22:40,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-14 06:22:40,852 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:40,853 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:22:40,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-14 06:22:40,853 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:40,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:40,853 INFO L85 PathProgramCache]: Analyzing trace with hash -19499740, now seen corresponding path program 1 times [2022-07-14 06:22:40,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:40,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978858746] [2022-07-14 06:22:40,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:40,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:40,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:40,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:40,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:40,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978858746] [2022-07-14 06:22:40,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978858746] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:22:40,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:22:40,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:22:40,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872108917] [2022-07-14 06:22:40,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:22:40,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:22:40,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:22:40,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:22:40,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:22:40,894 INFO L87 Difference]: Start difference. First operand 182 states and 218 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 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) [2022-07-14 06:22:41,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:22:41,017 INFO L93 Difference]: Finished difference Result 181 states and 216 transitions. [2022-07-14 06:22:41,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:22:41,017 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 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 23 [2022-07-14 06:22:41,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:22:41,018 INFO L225 Difference]: With dead ends: 181 [2022-07-14 06:22:41,018 INFO L226 Difference]: Without dead ends: 181 [2022-07-14 06:22:41,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:22:41,019 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 4 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:22:41,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 263 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:22:41,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-07-14 06:22:41,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2022-07-14 06:22:41,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 153 states have (on average 1.411764705882353) internal successors, (216), 180 states have internal predecessors, (216), 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) [2022-07-14 06:22:41,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 216 transitions. [2022-07-14 06:22:41,022 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 216 transitions. Word has length 23 [2022-07-14 06:22:41,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:22:41,035 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 216 transitions. [2022-07-14 06:22:41,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 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) [2022-07-14 06:22:41,035 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 216 transitions. [2022-07-14 06:22:41,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-14 06:22:41,036 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:41,036 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:22:41,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-14 06:22:41,036 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr74ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:41,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:41,036 INFO L85 PathProgramCache]: Analyzing trace with hash 998290617, now seen corresponding path program 1 times [2022-07-14 06:22:41,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:41,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110168343] [2022-07-14 06:22:41,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:41,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:41,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:41,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:41,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:41,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110168343] [2022-07-14 06:22:41,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110168343] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:22:41,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:22:41,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-14 06:22:41,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718183572] [2022-07-14 06:22:41,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:22:41,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 06:22:41,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:22:41,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 06:22:41,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:22:41,154 INFO L87 Difference]: Start difference. First operand 181 states and 216 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 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) [2022-07-14 06:22:41,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:22:41,527 INFO L93 Difference]: Finished difference Result 234 states and 268 transitions. [2022-07-14 06:22:41,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-14 06:22:41,527 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 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 24 [2022-07-14 06:22:41,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:22:41,528 INFO L225 Difference]: With dead ends: 234 [2022-07-14 06:22:41,528 INFO L226 Difference]: Without dead ends: 234 [2022-07-14 06:22:41,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-07-14 06:22:41,529 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 341 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:22:41,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 484 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:22:41,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-07-14 06:22:41,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 194. [2022-07-14 06:22:41,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 166 states have (on average 1.4036144578313252) internal successors, (233), 193 states have internal predecessors, (233), 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) [2022-07-14 06:22:41,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 233 transitions. [2022-07-14 06:22:41,532 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 233 transitions. Word has length 24 [2022-07-14 06:22:41,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:22:41,532 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 233 transitions. [2022-07-14 06:22:41,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 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) [2022-07-14 06:22:41,532 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 233 transitions. [2022-07-14 06:22:41,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-14 06:22:41,533 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:41,533 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:22:41,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-14 06:22:41,533 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:41,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:41,534 INFO L85 PathProgramCache]: Analyzing trace with hash 998278641, now seen corresponding path program 1 times [2022-07-14 06:22:41,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:41,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337728669] [2022-07-14 06:22:41,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:41,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:41,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:41,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:41,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:41,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337728669] [2022-07-14 06:22:41,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337728669] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:22:41,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:22:41,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:22:41,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576603211] [2022-07-14 06:22:41,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:22:41,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:22:41,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:22:41,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:22:41,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:22:41,583 INFO L87 Difference]: Start difference. First operand 194 states and 233 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 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) [2022-07-14 06:22:41,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:22:41,724 INFO L93 Difference]: Finished difference Result 225 states and 270 transitions. [2022-07-14 06:22:41,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:22:41,725 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 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 24 [2022-07-14 06:22:41,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:22:41,726 INFO L225 Difference]: With dead ends: 225 [2022-07-14 06:22:41,726 INFO L226 Difference]: Without dead ends: 225 [2022-07-14 06:22:41,726 INFO L412 NwaCegarLoop]: 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 [2022-07-14 06:22:41,726 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 96 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:22:41,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 139 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:22:41,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-07-14 06:22:41,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 172. [2022-07-14 06:22:41,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 150 states have (on average 1.36) internal successors, (204), 171 states have internal predecessors, (204), 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) [2022-07-14 06:22:41,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 204 transitions. [2022-07-14 06:22:41,730 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 204 transitions. Word has length 24 [2022-07-14 06:22:41,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:22:41,730 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 204 transitions. [2022-07-14 06:22:41,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 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) [2022-07-14 06:22:41,731 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 204 transitions. [2022-07-14 06:22:41,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-14 06:22:41,731 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:41,731 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:22:41,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-14 06:22:41,731 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr66REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:41,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:41,732 INFO L85 PathProgramCache]: Analyzing trace with hash 525851589, now seen corresponding path program 1 times [2022-07-14 06:22:41,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:41,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431569917] [2022-07-14 06:22:41,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:41,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:41,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:41,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:41,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:41,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431569917] [2022-07-14 06:22:41,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431569917] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:22:41,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:22:41,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-14 06:22:41,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185410388] [2022-07-14 06:22:41,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:22:41,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-14 06:22:41,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:22:41,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-14 06:22:41,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-07-14 06:22:41,984 INFO L87 Difference]: Start difference. First operand 172 states and 204 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 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) [2022-07-14 06:22:42,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:22:42,387 INFO L93 Difference]: Finished difference Result 242 states and 282 transitions. [2022-07-14 06:22:42,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-14 06:22:42,388 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 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 25 [2022-07-14 06:22:42,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:22:42,388 INFO L225 Difference]: With dead ends: 242 [2022-07-14 06:22:42,388 INFO L226 Difference]: Without dead ends: 242 [2022-07-14 06:22:42,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-07-14 06:22:42,389 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 316 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:22:42,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 318 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:22:42,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-07-14 06:22:42,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 172. [2022-07-14 06:22:42,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 150 states have (on average 1.3466666666666667) internal successors, (202), 171 states have internal predecessors, (202), 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) [2022-07-14 06:22:42,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 202 transitions. [2022-07-14 06:22:42,392 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 202 transitions. Word has length 25 [2022-07-14 06:22:42,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:22:42,392 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 202 transitions. [2022-07-14 06:22:42,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 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) [2022-07-14 06:22:42,392 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 202 transitions. [2022-07-14 06:22:42,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-14 06:22:42,392 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:42,392 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:22:42,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-14 06:22:42,392 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:42,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:42,393 INFO L85 PathProgramCache]: Analyzing trace with hash -896291290, now seen corresponding path program 1 times [2022-07-14 06:22:42,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:42,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278713778] [2022-07-14 06:22:42,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:42,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:42,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:42,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:42,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278713778] [2022-07-14 06:22:42,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278713778] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:22:42,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:22:42,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-14 06:22:42,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182047588] [2022-07-14 06:22:42,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:22:42,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 06:22:42,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:22:42,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 06:22:42,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:22:42,461 INFO L87 Difference]: Start difference. First operand 172 states and 202 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 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) [2022-07-14 06:22:42,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:22:42,655 INFO L93 Difference]: Finished difference Result 187 states and 220 transitions. [2022-07-14 06:22:42,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-14 06:22:42,656 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 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 25 [2022-07-14 06:22:42,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:22:42,656 INFO L225 Difference]: With dead ends: 187 [2022-07-14 06:22:42,656 INFO L226 Difference]: Without dead ends: 187 [2022-07-14 06:22:42,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-07-14 06:22:42,657 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 147 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:22:42,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 264 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:22:42,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-07-14 06:22:42,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 171. [2022-07-14 06:22:42,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 150 states have (on average 1.3333333333333333) internal successors, (200), 170 states have internal predecessors, (200), 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) [2022-07-14 06:22:42,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 200 transitions. [2022-07-14 06:22:42,659 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 200 transitions. Word has length 25 [2022-07-14 06:22:42,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:22:42,659 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 200 transitions. [2022-07-14 06:22:42,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 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) [2022-07-14 06:22:42,660 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 200 transitions. [2022-07-14 06:22:42,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-14 06:22:42,660 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:42,660 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:22:42,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-14 06:22:42,660 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:42,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:42,660 INFO L85 PathProgramCache]: Analyzing trace with hash -896291289, now seen corresponding path program 1 times [2022-07-14 06:22:42,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:42,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351409725] [2022-07-14 06:22:42,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:42,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:42,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:42,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:42,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:42,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351409725] [2022-07-14 06:22:42,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351409725] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:22:42,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:22:42,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-14 06:22:42,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751357637] [2022-07-14 06:22:42,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:22:42,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 06:22:42,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:22:42,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 06:22:42,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:22:42,774 INFO L87 Difference]: Start difference. First operand 171 states and 200 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 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) [2022-07-14 06:22:42,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:22:42,983 INFO L93 Difference]: Finished difference Result 173 states and 202 transitions. [2022-07-14 06:22:42,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 06:22:42,983 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 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 25 [2022-07-14 06:22:42,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:22:42,984 INFO L225 Difference]: With dead ends: 173 [2022-07-14 06:22:42,984 INFO L226 Difference]: Without dead ends: 173 [2022-07-14 06:22:42,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-07-14 06:22:42,985 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 131 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:22:42,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 224 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:22:42,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-07-14 06:22:42,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 170. [2022-07-14 06:22:42,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 150 states have (on average 1.32) internal successors, (198), 169 states have internal predecessors, (198), 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) [2022-07-14 06:22:42,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 198 transitions. [2022-07-14 06:22:42,987 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 198 transitions. Word has length 25 [2022-07-14 06:22:42,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:22:42,987 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 198 transitions. [2022-07-14 06:22:42,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 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) [2022-07-14 06:22:42,987 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 198 transitions. [2022-07-14 06:22:42,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-14 06:22:42,987 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:42,988 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:22:42,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-14 06:22:42,988 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:42,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:42,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1096103808, now seen corresponding path program 1 times [2022-07-14 06:22:42,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:42,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862389476] [2022-07-14 06:22:42,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:42,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:42,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:43,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:43,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:43,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862389476] [2022-07-14 06:22:43,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862389476] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:22:43,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:22:43,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-14 06:22:43,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637064062] [2022-07-14 06:22:43,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:22:43,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 06:22:43,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:22:43,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 06:22:43,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:22:43,054 INFO L87 Difference]: Start difference. First operand 170 states and 198 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 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) [2022-07-14 06:22:43,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:22:43,251 INFO L93 Difference]: Finished difference Result 172 states and 201 transitions. [2022-07-14 06:22:43,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-14 06:22:43,251 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 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 26 [2022-07-14 06:22:43,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:22:43,252 INFO L225 Difference]: With dead ends: 172 [2022-07-14 06:22:43,252 INFO L226 Difference]: Without dead ends: 172 [2022-07-14 06:22:43,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-07-14 06:22:43,253 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 127 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:22:43,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 222 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:22:43,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-07-14 06:22:43,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 169. [2022-07-14 06:22:43,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 150 states have (on average 1.3133333333333332) internal successors, (197), 168 states have internal predecessors, (197), 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) [2022-07-14 06:22:43,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 197 transitions. [2022-07-14 06:22:43,255 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 197 transitions. Word has length 26 [2022-07-14 06:22:43,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:22:43,255 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 197 transitions. [2022-07-14 06:22:43,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 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) [2022-07-14 06:22:43,255 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 197 transitions. [2022-07-14 06:22:43,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-14 06:22:43,255 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:43,255 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:22:43,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-14 06:22:43,255 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr41REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:43,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:43,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1096103807, now seen corresponding path program 1 times [2022-07-14 06:22:43,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:43,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447417528] [2022-07-14 06:22:43,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:43,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:43,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:43,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:43,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:43,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447417528] [2022-07-14 06:22:43,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447417528] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:22:43,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:22:43,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-14 06:22:43,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667936625] [2022-07-14 06:22:43,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:22:43,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 06:22:43,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:22:43,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 06:22:43,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:22:43,326 INFO L87 Difference]: Start difference. First operand 169 states and 197 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 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) [2022-07-14 06:22:43,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:22:43,571 INFO L93 Difference]: Finished difference Result 171 states and 200 transitions. [2022-07-14 06:22:43,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-14 06:22:43,571 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 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 26 [2022-07-14 06:22:43,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:22:43,572 INFO L225 Difference]: With dead ends: 171 [2022-07-14 06:22:43,572 INFO L226 Difference]: Without dead ends: 171 [2022-07-14 06:22:43,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-07-14 06:22:43,573 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 120 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:22:43,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 303 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:22:43,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-07-14 06:22:43,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2022-07-14 06:22:43,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 150 states have (on average 1.3066666666666666) internal successors, (196), 167 states have internal predecessors, (196), 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) [2022-07-14 06:22:43,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 196 transitions. [2022-07-14 06:22:43,575 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 196 transitions. Word has length 26 [2022-07-14 06:22:43,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:22:43,575 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 196 transitions. [2022-07-14 06:22:43,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 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) [2022-07-14 06:22:43,575 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 196 transitions. [2022-07-14 06:22:43,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-14 06:22:43,576 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:43,576 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:22:43,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-14 06:22:43,576 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:43,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:43,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1722459940, now seen corresponding path program 1 times [2022-07-14 06:22:43,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:43,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888274532] [2022-07-14 06:22:43,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:43,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:43,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:43,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:43,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888274532] [2022-07-14 06:22:43,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888274532] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:22:43,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895239675] [2022-07-14 06:22:43,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:43,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:22:43,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:22:43,665 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) [2022-07-14 06:22:43,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-14 06:22:43,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:43,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-14 06:22:43,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:22:43,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-14 06:22:43,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-14 06:22:43,843 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-07-14 06:22:43,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-07-14 06:22:43,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:22:43,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-14 06:22:43,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:22:43,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:22:43,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:43,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:22:43,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:43,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895239675] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:22:43,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:22:43,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-07-14 06:22:43,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712929513] [2022-07-14 06:22:43,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:22:43,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:22:43,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:22:43,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:22:43,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:22:43,977 INFO L87 Difference]: Start difference. First operand 168 states and 196 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 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) [2022-07-14 06:22:44,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:22:44,045 INFO L93 Difference]: Finished difference Result 174 states and 202 transitions. [2022-07-14 06:22:44,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:22:44,046 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 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 27 [2022-07-14 06:22:44,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:22:44,046 INFO L225 Difference]: With dead ends: 174 [2022-07-14 06:22:44,046 INFO L226 Difference]: Without dead ends: 174 [2022-07-14 06:22:44,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:22:44,049 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 12 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:22:44,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 341 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:22:44,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-07-14 06:22:44,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 170. [2022-07-14 06:22:44,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 152 states have (on average 1.3026315789473684) internal successors, (198), 169 states have internal predecessors, (198), 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) [2022-07-14 06:22:44,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 198 transitions. [2022-07-14 06:22:44,052 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 198 transitions. Word has length 27 [2022-07-14 06:22:44,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:22:44,052 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 198 transitions. [2022-07-14 06:22:44,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 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) [2022-07-14 06:22:44,052 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 198 transitions. [2022-07-14 06:22:44,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-14 06:22:44,052 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:44,053 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:22:44,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-14 06:22:44,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-14 06:22:44,264 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr76ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:44,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:44,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1856650752, now seen corresponding path program 1 times [2022-07-14 06:22:44,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:44,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038374512] [2022-07-14 06:22:44,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:44,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:44,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:44,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:44,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038374512] [2022-07-14 06:22:44,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038374512] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:22:44,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604853737] [2022-07-14 06:22:44,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:44,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:22:44,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:22:44,471 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:22:44,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-14 06:22:44,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:44,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-14 06:22:44,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:22:44,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-14 06:22:44,736 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:22:44,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2022-07-14 06:22:45,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:45,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:22:45,183 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2022-07-14 06:22:45,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 72 [2022-07-14 06:22:45,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:45,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604853737] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:22:45,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:22:45,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2022-07-14 06:22:45,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478607482] [2022-07-14 06:22:45,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:22:45,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-14 06:22:45,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:22:45,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-14 06:22:45,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2022-07-14 06:22:45,522 INFO L87 Difference]: Start difference. First operand 170 states and 198 transitions. Second operand has 31 states, 30 states have (on average 2.433333333333333) internal successors, (73), 31 states have internal predecessors, (73), 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) [2022-07-14 06:22:45,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:22:45,923 INFO L93 Difference]: Finished difference Result 191 states and 220 transitions. [2022-07-14 06:22:45,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-14 06:22:45,924 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.433333333333333) internal successors, (73), 31 states have internal predecessors, (73), 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 28 [2022-07-14 06:22:45,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:22:45,924 INFO L225 Difference]: With dead ends: 191 [2022-07-14 06:22:45,924 INFO L226 Difference]: Without dead ends: 185 [2022-07-14 06:22:45,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2022-07-14 06:22:45,925 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 138 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 307 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:22:45,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 811 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 380 Invalid, 0 Unknown, 307 Unchecked, 0.2s Time] [2022-07-14 06:22:45,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-14 06:22:45,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-07-14 06:22:45,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 167 states have (on average 1.281437125748503) internal successors, (214), 184 states have internal predecessors, (214), 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) [2022-07-14 06:22:45,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 214 transitions. [2022-07-14 06:22:45,927 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 214 transitions. Word has length 28 [2022-07-14 06:22:45,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:22:45,928 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 214 transitions. [2022-07-14 06:22:45,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.433333333333333) internal successors, (73), 31 states have internal predecessors, (73), 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) [2022-07-14 06:22:45,928 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 214 transitions. [2022-07-14 06:22:45,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-14 06:22:45,928 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:45,928 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:22:45,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-14 06:22:46,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:22:46,137 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:46,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:46,138 INFO L85 PathProgramCache]: Analyzing trace with hash 607909674, now seen corresponding path program 1 times [2022-07-14 06:22:46,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:46,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924248445] [2022-07-14 06:22:46,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:46,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:46,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:46,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:46,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:46,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924248445] [2022-07-14 06:22:46,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924248445] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:22:46,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:22:46,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-14 06:22:46,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248856935] [2022-07-14 06:22:46,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:22:46,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 06:22:46,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:22:46,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 06:22:46,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:22:46,230 INFO L87 Difference]: Start difference. First operand 185 states and 214 transitions. Second operand has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 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) [2022-07-14 06:22:46,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:22:46,467 INFO L93 Difference]: Finished difference Result 190 states and 221 transitions. [2022-07-14 06:22:46,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-14 06:22:46,468 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 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) Word has length 29 [2022-07-14 06:22:46,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:22:46,468 INFO L225 Difference]: With dead ends: 190 [2022-07-14 06:22:46,468 INFO L226 Difference]: Without dead ends: 190 [2022-07-14 06:22:46,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-07-14 06:22:46,469 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 123 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:22:46,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 269 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:22:46,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-07-14 06:22:46,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 184. [2022-07-14 06:22:46,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 167 states have (on average 1.2754491017964071) internal successors, (213), 183 states have internal predecessors, (213), 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) [2022-07-14 06:22:46,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 213 transitions. [2022-07-14 06:22:46,471 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 213 transitions. Word has length 29 [2022-07-14 06:22:46,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:22:46,471 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 213 transitions. [2022-07-14 06:22:46,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 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) [2022-07-14 06:22:46,471 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 213 transitions. [2022-07-14 06:22:46,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-14 06:22:46,472 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:46,472 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:22:46,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-14 06:22:46,472 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr45REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:46,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:46,472 INFO L85 PathProgramCache]: Analyzing trace with hash 607909675, now seen corresponding path program 1 times [2022-07-14 06:22:46,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:46,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449550863] [2022-07-14 06:22:46,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:46,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:46,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:46,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:46,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:46,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449550863] [2022-07-14 06:22:46,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449550863] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:22:46,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:22:46,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-14 06:22:46,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963293174] [2022-07-14 06:22:46,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:22:46,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-14 06:22:46,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:22:46,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-14 06:22:46,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:22:46,625 INFO L87 Difference]: Start difference. First operand 184 states and 213 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 11 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) [2022-07-14 06:22:47,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:22:47,051 INFO L93 Difference]: Finished difference Result 230 states and 266 transitions. [2022-07-14 06:22:47,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 06:22:47,052 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 11 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) Word has length 29 [2022-07-14 06:22:47,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:22:47,052 INFO L225 Difference]: With dead ends: 230 [2022-07-14 06:22:47,052 INFO L226 Difference]: Without dead ends: 230 [2022-07-14 06:22:47,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-07-14 06:22:47,053 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 263 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:22:47,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 437 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:22:47,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-07-14 06:22:47,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 215. [2022-07-14 06:22:47,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 198 states have (on average 1.2575757575757576) internal successors, (249), 214 states have internal predecessors, (249), 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) [2022-07-14 06:22:47,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 249 transitions. [2022-07-14 06:22:47,056 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 249 transitions. Word has length 29 [2022-07-14 06:22:47,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:22:47,056 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 249 transitions. [2022-07-14 06:22:47,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 11 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) [2022-07-14 06:22:47,056 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 249 transitions. [2022-07-14 06:22:47,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-14 06:22:47,057 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:47,057 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:22:47,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-14 06:22:47,057 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:47,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:47,057 INFO L85 PathProgramCache]: Analyzing trace with hash 997305066, now seen corresponding path program 1 times [2022-07-14 06:22:47,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:47,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533948854] [2022-07-14 06:22:47,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:47,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:47,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:47,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:47,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:47,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533948854] [2022-07-14 06:22:47,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533948854] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:22:47,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:22:47,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:22:47,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885221600] [2022-07-14 06:22:47,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:22:47,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:22:47,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:22:47,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:22:47,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:22:47,101 INFO L87 Difference]: Start difference. First operand 215 states and 249 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 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) [2022-07-14 06:22:47,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:22:47,250 INFO L93 Difference]: Finished difference Result 232 states and 261 transitions. [2022-07-14 06:22:47,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 06:22:47,253 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 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) Word has length 31 [2022-07-14 06:22:47,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:22:47,253 INFO L225 Difference]: With dead ends: 232 [2022-07-14 06:22:47,253 INFO L226 Difference]: Without dead ends: 232 [2022-07-14 06:22:47,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:22:47,254 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 103 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:22:47,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 242 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:22:47,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-07-14 06:22:47,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 215. [2022-07-14 06:22:47,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 198 states have (on average 1.2474747474747474) internal successors, (247), 214 states have internal predecessors, (247), 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) [2022-07-14 06:22:47,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 247 transitions. [2022-07-14 06:22:47,256 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 247 transitions. Word has length 31 [2022-07-14 06:22:47,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:22:47,256 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 247 transitions. [2022-07-14 06:22:47,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 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) [2022-07-14 06:22:47,257 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 247 transitions. [2022-07-14 06:22:47,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-14 06:22:47,257 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:47,257 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:22:47,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-14 06:22:47,257 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr76ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:47,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:47,257 INFO L85 PathProgramCache]: Analyzing trace with hash 851686138, now seen corresponding path program 1 times [2022-07-14 06:22:47,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:47,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13920774] [2022-07-14 06:22:47,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:47,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:47,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:47,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:47,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13920774] [2022-07-14 06:22:47,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13920774] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:22:47,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:22:47,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:22:47,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685079103] [2022-07-14 06:22:47,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:22:47,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:22:47,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:22:47,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:22:47,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:22:47,300 INFO L87 Difference]: Start difference. First operand 215 states and 247 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 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) [2022-07-14 06:22:47,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:22:47,332 INFO L93 Difference]: Finished difference Result 243 states and 273 transitions. [2022-07-14 06:22:47,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:22:47,332 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 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) Word has length 32 [2022-07-14 06:22:47,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:22:47,333 INFO L225 Difference]: With dead ends: 243 [2022-07-14 06:22:47,333 INFO L226 Difference]: Without dead ends: 243 [2022-07-14 06:22:47,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:22:47,333 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 44 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:22:47,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 262 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:22:47,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-07-14 06:22:47,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 215. [2022-07-14 06:22:47,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 198 states have (on average 1.2424242424242424) internal successors, (246), 214 states have internal predecessors, (246), 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) [2022-07-14 06:22:47,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 246 transitions. [2022-07-14 06:22:47,336 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 246 transitions. Word has length 32 [2022-07-14 06:22:47,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:22:47,336 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 246 transitions. [2022-07-14 06:22:47,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 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) [2022-07-14 06:22:47,336 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 246 transitions. [2022-07-14 06:22:47,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-14 06:22:47,337 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:47,337 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:22:47,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-14 06:22:47,337 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr57REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:47,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:47,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1155721340, now seen corresponding path program 1 times [2022-07-14 06:22:47,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:47,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104953544] [2022-07-14 06:22:47,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:47,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:47,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:47,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:47,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:47,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104953544] [2022-07-14 06:22:47,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104953544] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:22:47,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:22:47,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-14 06:22:47,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260260638] [2022-07-14 06:22:47,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:22:47,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-14 06:22:47,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:22:47,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-14 06:22:47,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-07-14 06:22:47,558 INFO L87 Difference]: Start difference. First operand 215 states and 246 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 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) [2022-07-14 06:22:48,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:22:48,176 INFO L93 Difference]: Finished difference Result 237 states and 268 transitions. [2022-07-14 06:22:48,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-14 06:22:48,176 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 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 38 [2022-07-14 06:22:48,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:22:48,177 INFO L225 Difference]: With dead ends: 237 [2022-07-14 06:22:48,177 INFO L226 Difference]: Without dead ends: 230 [2022-07-14 06:22:48,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2022-07-14 06:22:48,178 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 218 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:22:48,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 539 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:22:48,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-07-14 06:22:48,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 213. [2022-07-14 06:22:48,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 196 states have (on average 1.239795918367347) internal successors, (243), 212 states have internal predecessors, (243), 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) [2022-07-14 06:22:48,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 243 transitions. [2022-07-14 06:22:48,182 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 243 transitions. Word has length 38 [2022-07-14 06:22:48,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:22:48,182 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 243 transitions. [2022-07-14 06:22:48,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 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) [2022-07-14 06:22:48,182 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 243 transitions. [2022-07-14 06:22:48,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-14 06:22:48,182 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:48,183 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:22:48,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-14 06:22:48,183 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr57REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:48,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:48,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1546128188, now seen corresponding path program 1 times [2022-07-14 06:22:48,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:48,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450079002] [2022-07-14 06:22:48,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:48,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:48,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:48,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:48,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:48,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450079002] [2022-07-14 06:22:48,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450079002] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:22:48,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:22:48,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-14 06:22:48,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094705683] [2022-07-14 06:22:48,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:22:48,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-14 06:22:48,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:22:48,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-14 06:22:48,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-07-14 06:22:48,408 INFO L87 Difference]: Start difference. First operand 213 states and 243 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 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) [2022-07-14 06:22:48,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:22:48,875 INFO L93 Difference]: Finished difference Result 238 states and 269 transitions. [2022-07-14 06:22:48,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-14 06:22:48,876 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 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 38 [2022-07-14 06:22:48,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:22:48,877 INFO L225 Difference]: With dead ends: 238 [2022-07-14 06:22:48,877 INFO L226 Difference]: Without dead ends: 213 [2022-07-14 06:22:48,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-07-14 06:22:48,877 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 197 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:22:48,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 539 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:22:48,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-07-14 06:22:48,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 200. [2022-07-14 06:22:48,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 183 states have (on average 1.2513661202185793) internal successors, (229), 199 states have internal predecessors, (229), 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) [2022-07-14 06:22:48,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 229 transitions. [2022-07-14 06:22:48,881 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 229 transitions. Word has length 38 [2022-07-14 06:22:48,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:22:48,881 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 229 transitions. [2022-07-14 06:22:48,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 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) [2022-07-14 06:22:48,881 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 229 transitions. [2022-07-14 06:22:48,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-14 06:22:48,881 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:22:48,881 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:22:48,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-14 06:22:48,882 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-07-14 06:22:48,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:22:48,882 INFO L85 PathProgramCache]: Analyzing trace with hash -936117449, now seen corresponding path program 1 times [2022-07-14 06:22:48,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:22:48,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567374114] [2022-07-14 06:22:48,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:48,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:22:48,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:49,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:49,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:22:49,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567374114] [2022-07-14 06:22:49,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567374114] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:22:49,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137323071] [2022-07-14 06:22:49,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:22:49,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:22:49,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:22:49,126 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:22:49,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-14 06:22:49,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:22:49,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-14 06:22:49,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:22:49,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-14 06:22:49,708 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-14 06:22:49,709 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 29 [2022-07-14 06:22:49,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:22:49,768 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-14 06:22:49,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:22:49,784 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-14 06:22:49,916 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:22:49,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 49 [2022-07-14 06:22:49,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-14 06:22:50,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:22:50,039 INFO L356 Elim1Store]: treesize reduction 62, result has 21.5 percent of original size [2022-07-14 06:22:50,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 46 [2022-07-14 06:22:50,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-14 06:22:50,215 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-14 06:22:50,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 65 [2022-07-14 06:22:50,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-14 06:22:50,226 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:22:50,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2022-07-14 06:22:50,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-07-14 06:22:50,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:22:50,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:22:50,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:22:51,893 INFO L356 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-07-14 06:22:51,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 388 treesize of output 232 [2022-07-14 06:22:51,959 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:22:51,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 8843 treesize of output 7719 [2022-07-14 06:22:52,024 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:22:52,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8349 treesize of output 7305